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N·m (25 ft. lbs.) torque.
(13) Install a new oil filter.
DR
(14) Fill engine crankcase with the specified amount and grade of oil. (Refer to LUBRICATION & MAINTENANCE - SPECIFICATIONS).
(15) Connect the negative cable(s) to the battery. (16) Start the engine and check for any leaks.
REMOVAL
(1) Disconnect the battery negative cable. (2) Remove the air cleaner resonator and duct
work as an assembly.
(3) Drain cooling system (Refer to 7 - COOLING -
STANDARD PROCEDURE).
(4) Remove the accessory drive belt (Refer to 7 - COOLING/ACCESSORY DRIVE/DRIVE BELTS - REMOVAL).
(5) Remove the viscous fan/drive (Refer to 7 - COOLING/ENGINE/RADIATOR FAN - REMOVAL). (6) Remove radiator (Refer to 7 - COOLING/EN-
GINE/RADIATOR - REMOVAL).
(7) Remove the upper crossmember and top core
support.
NOTE: It is not necessary to drain A/C system for engine removal.
(8) Remove the A/C compressor with the lines
attached. Secure compressor out of the way. (9) Remove generator assembly (Refer
to 8 - ELECTRICAL/CHARGING/GENERATOR - REMOV- AL).
(10) Perform the Fuel System Pressure Release procedure (Refer to 14 - FUEL SYSTEM/FUEL DELIVERY - STANDARD PROCEDURE).
(11) Remove the intake manifold and IAFM as an assembly(Refer to 9 - ENGINE/MANIFOLDS/IN- TAKE MANIFOLD - REMOVAL).
(12) Disconnect the heater hoses.
NOTE: It is not necessary to disconnect P/S hoses from pump, for P/S pump removal.
aside.
(14) Disconnect the fuel supply line (Refer to 14 - FUEL SYSTEM/FUEL DELIVERY/QUICK CON- NECT FITTING - STANDARD PROCEDURE).
(15) Raise and support the vehicle on a hoist and
drain the engine oil.
(16) Remove engine front mount thru-bolt nuts. (17) Disconnect the transmission oil cooler lines
from their retainers at the oil pan bolts.
(18) Disconnect exhaust pipe at manifolds. (19) Disconnect the starter wires. Remove starter to 8 - ELECTRICAL/STARTING/
motor STARTER MOTOR - REMOVAL).
(Refer
(7) Be sure all fluid has been removed from the
(13) Remove the power steering pump and set
DR ENGINE - 5.7L (Continued)
ENGINE - 5.7L
9 - 187
(20) Remove the structural dust cover and trans- mission inspection cover,(Refer to 9 - ENGINE/EN- GINE BLOCK/STRUCTURAL COVER - REMOVAL). (21) Remove drive plate to converter bolts (Auto-
matic transmission equipped vehicles).
(22) Remove transmission bell housing to engine
block bolts.
(23) Lower the vehicle. (24) Install engine lift fixture, special tool # 8984. (25) Separate engine from transmission, remove engine from vehicle, and install engine assembly on a repair stand.
INSTALLATION
(1) Install engine lift fixture Special tool # 8984. (2) Position the engine in the engine compartment. (3) Lower engine into compartment and align engine with transmission: † Manual Transmission: Align clutch disc assem- bly (if disturbed). Install transmission input shaft into clutch disc while mating engine and transmis- sion surfaces. Install two transmission to engine block mounting bolts finger tight. † Automatic Transmission: Mate engine and trans- mission and install two transmission to engine block mounting bolts finger tight.
(4) Position the thru-bolt into the support cushion
brackets.
(12) Lower the vehicle. (13) Remove engine lift fixture, special tool # 8984. (14) Connect the fuel supply line (Refer to 14 - FUEL SYSTEM/FUEL DELIVERY/QUICK CON- NECT FITTING - STANDARD PROCEDURE).
(15) Reinstall the power steering pump. (16) Connect the heater hoses. (17) Install the intake manifold. (18) Using a new gasket,
install
throttle body (Refer to 14 - FUEL SYSTEM/FUEL INJECTION/ THROTTLE BODY - INSTALLATION).
(19) Install the generator and wire connections (Refer to 8 - ELECTRICAL/CHARGING/GENERA- TOR - INSTALLATION).
(20) Install a/c compressor and lines (Refer to 24 - HEATING & AIR CONDITIONING/PLUMBING/A/C COMPRESSOR - INSTALLATION).
(21) Install the accessory drive belt (Refer to 7 - COOLING/ACCESSORY DRIVE/DRIVE BELTS - INSTALLATION).
(22) Install upper radiator support crossmember. (23) Install radiator (Refer to 7 - COOLING/EN-
GINE/RADIATOR - INSTALLATION).
(24) Connect the radiator lower hose. (25) Connect the transmission oil cooler lines to
the radiator.
(26) Install the fan shroud. (27) Install the fan (Refer to 7 - COOLING/EN-
(5) Lower engine assembly until engine mount
GINE/RADIATOR FAN - INSTALLATION).
through bolts rest in mount perches.
(6) Install remaining transmission to engine block
mounting bolts and tighten.
(7) Tighten engine mount through bolts. (8) Install drive plate to torque converter bolts.
work..
(28) Connect the radiator upper hose. (29) Install the washer bottle. (30) Connect the transmission cooler lines. (31) Install the air cleaner resonator and duct
(Automatic transmission models)
(9) Install the structural dust cover and transmis- sion dust cover,(Refer to 9 - ENGINE/ENGINE BLOCK/STRUCTURAL COVER - INSTALLATION) . (10) Install the starter and connect the starter to 8 - ELECTRICAL/STARTING/
wires STARTER MOTOR - INSTALLATION). (11) Install exhaust pipe to manifold.
(Refer
(32) Add engine oil to crankcase (Refer to LUBRI- CATION & MAINTENANCE/FLUID TYPES - SPEC- IFICATIONS).
(33) Fill cooling system (Refer to 7 - COOLING -
STANDARD PROCEDURE).
(34) Connect battery negative cable. (35) Start engine and inspect for leaks. (36) Road test vehicle.
ENGINE - 5.7L
9 - 188
ENGINE - 5.7L (Continued) SPECIFICATIONS5.7L ENGINE
DESCRIPTION
SPECIFICATION
GENERAL SPECIFICATIONS
Engine Type
Bore and Stroke
90° V-8 OHV
99.5 x 90.9 mm (3.91 x 3.58 in.)
Displacement
5.7L (345 c.i.)
Compression Ratio
9.6:1
Firing Order
Lubrication
1–8–4–3–6–5–7–2
Pressure Feed – Full
Flow
Filtration
DR
DESCRIPTION
SPECIFICATION
Bearing to Journal Clearance Standard
No. 1
No. 2
No. 3
No. 4
No. 5
Camshaft End Play
0.040 – 0.080 mm (.0015 – .003 in.) 0.050 – 0.090 mm (0.0019 – .0035 in.) 0.040 – 0.080 mm (.0015 – .003 in.) 0.050 – 0.090 mm (0.0019 – .0035 in.) 0.040 – 0.080 mm (.0015 – .003 in.)
0.080 - 0.290 mm (0.0031 - 0.0114 in.)
CONNECTING RODS
Cooling System
Liquid Cooled – Forced
Piston Pin bore Diameter
Cylinder Block
Cylinder Head
Crankshaft
Camshaft
Circulation
Cast Iron
Aluminum
Nodular Iron
Hollow assembled
camshaft
Pistons
Aluminum Alloy w/strut
Connecting Rods
Powdered metal
CAMSHAFT
Bearing Journal Diameter No. 1
No. 2
No. 3
No. 4
No. 5
58.2 mm (2.29 in.) 57.8 mm (2.27 in.) 57.4 mm (2.26 in.) 57.0 mm (2.24 in.) 43.633 mm (1.72 in.)
Side Clearance
23.955 – 23.975 mm (0.9431 – 0.9438 in.)
0.10 - 0.35mm
( 0.003 - 0.0137 in.)
CRANKSHAFT
Rod Journal
Diameter
Out of Round (Max.) Taper (Max.) Bearing Clearance
53.992 – 54.008 mm (2.125 – 2.126 in.)
0.005 mm (0.0002 in.) 0.003 mm ( 0.0001 in.)
0.020 – 0.060 mm
(0.0007 – 0.0023 in.)
Main Bearing Journal
Diameter
64.988 – 65.012 mm (2.5585 – 2.5595 in.)
Out of Round (Max.)
0.005 mm (0.0002 in.)
Taper (Max.)
0.003 mm (0.0001 in.)
Bearing Clearance
Crankshaft End Play
0.023 – 0.051mm (0.0009 – 0.002 in.)
0.052 – 0.282 mm (0.002 – 0.011 in.)
Service Limit
0.282 mm ( 0.011 in.)
DR ENGINE - 5.7L (Continued)
ENGINE - 5.7L
9 - 189
DESCRIPTION
SPECIFICATION
DESCRIPTION
SPECIFICATION
CYLINDER BLOCK
Exhaust
Cylinder Bore
Diameter
Out of Round (Max.)
Taper (Max.)
Lifter Bore
Diameter
99.50 – mm (3.917 – in.) 0.00762 – mm
.0003 ( in.) 0.0127 – mm
0005 ( in.)
21.45 – 21.425 mm (0.8444 – 0.8435 in.)
CYLINDER HEAD AND VALVES
Valve Seat
Angle
44.50° – 45.00°
Runout (Max.)
0.05 mm (0.0019 in.)
Width (Finish)
Intake
1.018 – 1.62 mm
(0.0464 – 0.0637 in.)
Exhaust
1.48 – 1.92 mm
(0.0582 – 0.0755 in.)
Valves
Face Angle
Head Diameter
45.0° – 45.5°
Intake
Exhaust
50.67 mm – 50.93 mm (1.99 in.) – (2.00 in.) 39.27mm – 39.53mm (1.54 in.) – (1.55 in.)
Length (Overall)
Intake
Exhaust
123.38 – 123.76 mm (4.857 in. – 4.872 in.) 120.475 – 120.855 mm (4.743 in. – 4.758 in.)
Guide Bore
Stem to Guide Clearance Intake
7.905 - 7.925 mm (0.311 - 0.312 in.)
7.975 - 8.000 mm (0.313 - 0.314 on.)
0.022 - 0.065 mm
(0.0008 - 0.0025 in.)
Exhaust
0.050 - 0.095 mm
(0.0019 - 0.0037 in.)
Valve Springs Spring Tension
Valve closed
422 N @ 46.0 mm (95 lbs. @ 1.81 in.)
Valve open
@ 33.5 mm
Number of Coils
7.4
Installed Height
46.0 mm (1.81 in.)
Wire Diameter
5.39 x 4.52mm
(0.212 – 0.177in.)
HYDRAULIC TAPPETS
Body Diameter
Clearance (to bore)
21.387 - 21.405 mm (0.8420 - 0.8427 in.)
0.020 - 0.063 mm
(0.0007 - 0.0024 in.)
Dry Lash
3.0 mm (at the valve)
(0.1181 in.)
OIL PRESSURE
Curb Idle (Min.*)
25 kPa ( 4 psi)
@ 3000 rpm
170-758 kPa ( 25-110
psi)
* If oil pressure is zero at curb idle, DO NOT RUN ENGINE.
Valve Lift (@ zero lash) Intake Exhaust
Stem Diameter
12 mm (0.472 in.) 11.7 mm (0.460 in.)
OIL PUMP
Clearance over Rotors
.095 mm ( 0.0038 in.)
Intake
7.935 - 7.953 mm (0.312 - 0.313 in.)
(Max.)
Outer Rotor to pump
body
ENGINE - 5.7L
9 - 190
ENGINE - 5.7L (Continued)DR
DESCRIPTION
SPECIFICATION
DESCRIPTION
SPECIFICATION
Clearance (Max.)
0.235 mm ( 0.009 in.)
Compression Ring (2nd)
0.35 - 0.60 mm
Tip Clearance between
(0.0137 - 0.0236 in.)
Rotors (Max.)
.150 mm (0.006 in.)
Oil Control (Steel Rails)
0.15 - 0.66 mm
Ring Side Clearance
Compression Rings Top
(0.0059 - 0.0259 in.)
0.02 - 0.068 mm
(0.0007 - 0.0026 in.)
2nd
0.02 - 0.058 mm
(0.0007 - 0.0022 in.)
Ring Width Compression rings
Oil Ring (Steel Rails) & Max.
1.472 - 1.490 mm
(0.05795 - 0.0586 in.)
0.447 - 0.473 mm
(0.0175 - 0.0186 in.)
VALVE TIMING
Exhaust Valve
Closes (ATDC) Opens (BTDC)
Intake Valve
Closes (ATDC) Opens (BTDC)
Valve Overlap
27° 233°
253° 7°
34°
PISTONS
Clearance at Top of Skirt
0.0215 - 0.0485 mm
measured at 45.0 mm (1.77 in.) below deck
Land Clearance (Diam.) Groove #1
(0.0008 - 0.0019 in.)
0.6715 - 0.7105 mm (0.0264 - 0.0279 in.)
Groove #2
.5455 - .6245
(0.0214 - 0.0245 in.)
54.70 – 55.30mm (2.153 – 2.177 in.)
Piston Length
Piston Ring Groove
Width
Groove #1
1.51 - 1.54 mm
(0.0594 - 0.0606 in.)
Groove #2
1.51 - 1.53 mm
(0.0594 - 0.0602 in.)
Groove #3
3.030 - 3.055 mm (0.1192 - 0.1202 in.)
Weight
413 grams (14.56 oz.)
PISTON PINS
Clearance in Piston
0.009 - 0.018 mm
(0.00035 - 0.00070 in.)
24.0 - 24.003 mm
(0.9448 - 0.9449 in.)
69.75 - 70.25 mm (2.74 - 2.76 in.)
PISTON RINGS
Diameter
Length
Ring Gap
Compression Ring (Top)
0.23 - 0.38 mm
(0.0090 - 0.0149 in.)
DR ENGINE - 5.7L (Continued) TORQUE
TORQUE CHART 5.7L ENGINE
DESCRIPTION
N·m
Ft. Lbs. —
— 90
——
In. Lbs. 177
240
— 250250
40 — 15
plus 90° Turn ——
—
20
27
122
2828
55
21
plus 90° Turn 27
plus 90° Turn 28 —Block Pipe Plugs (1/4 NPT)
(3/8 NPT)
Camshaft Sprocket—Bolt Camshaft Tensioner Plate—Bolts Timing Chain Case Cover— Bolts
Lifting Stud
Connecting Rod Cap—Bolts
Main Bearing Cap—Bolts M-12
Crossbolts M-8
Cylinder Head—Bolts M-12 Bolts—
— —
—
— —
— — —
Step 1
Step 2
Step 334
54
Turn 90°25
40
Turn 90°M-8 Bolts Step 1
Step 2Cylinder Head Cover—Bolts Exhaust Manifold to Cylinder Head Flywheel—Bolts Front Insulator—Through bolt/nut Front Insulator to Support Bracket
—Stud Nut (4WD) —Through Bolt/Nut (4WD)
Front Insulator to Block— Bolts (2WD) Generator—Mounting Bolt Intake Manifold—Bolts
— 15 — 25 — —
70
22020
34
2595
9541
102
95—
70
7030
75
7040
— 55
Refer to ProcedureENGINE - 5.7L
9 - 191
DESCRIPTION
Oil Pan—Bolts Oil Dipstick Tube Oil Pan—Drain Plug Oil Pump—Attaching Bolts Oil Pump Pickup Tube – Bolt and Nut Rear Seal Retainer Attaching Bolts Rear Insulator to Bracket— Through-Bolt (2WD) Rear Insulator to Crossmember Support Bracket—Nut (2WD) Rear Insulator to Crossmember— Nuts (4WD) Rear Insulator to Transmission— Bolts (4WD) Rear Insulator Bracket—Bolts (4WD Automatic) Rear Support Bracket to Crossmember Flange—Nuts Rear Support Plate to Transfer Case—Bolts Rocker Arm—Bolts Spark Plugs Thermostat Housing—Bolts Throttle Body—Bolts Transfer Case to Insulator Mounting Plate—Nuts Transmission Support Bracket— Bolts (2WD) Vibration Damper—Bolt Water Pump to Timing Chain Case Cover—Bolts
N·m 12
12
34
28
2815
68
41
Ft. — — 25
— ——
50
30
In. 105
105
— 250
250132
—
—
68
50
—
68
50
—
68
41
41
22
— 28
12
20450
30
30
— — — — 105
—
—
—
195
— 250
105
—68
50
—
176
28129
—— 250
ENGINE - 5.7L
9 - 192
ENGINE - 5.7L (Continued) SPECIAL TOOLS5.7L ENGINE
DR
Bloc–Chek–KitC-3685–A
DialIndicatorC-3339
BoreSizeIndicatorC-119
Puller8454
CrankshaftDamperInstaller8512
CrankshaftDamperRemovalInsert8513-A
HandleC-4171
OilPressureGaugeC-3292
PistonRingCompressorC-385
DR ENGINE - 5.7L (Continued)
ENGINE - 5.7L
9 - 193
PressureTesterKit7700
RearCrankshaftSealInstaller8349
RearCrankshaftSealRemover8506
Adapter,ValveSpringCompressorOff-vehicle8464
ENGINESUPPORTFIXTURE8534
ValveSpringCompressorC-3422-B
ENGINELIFTFIXTURE8984
ValveSpringTesterC-647
REARCAMPLUGINSTALLER9048
9 - 194
ENGINE - 5.7L
AIR INTAKE SYSTEM REMOVAL
Filter Element Only
DR
Housing removal is not necessary for element (fil-
ter) replacement.
at air cleaner cover.
(1) Loosen clamp (Fig. 2) and disconnect air duct
(2) Pry over 4 spring clips (Fig. 2) from housing
cover (spring clips retain cover to housing).
(3) Release housing cover from locating tabs on
housing (Fig. 2) and remove cover.
(4) Remove air cleaner element (filter) from hous-
(5) Clean inside of housing before replacing ele-
ing.
ment.
Fig.3AIRCLEANERHOUSING
1 - AIR CLEANER HOUSING ASSEMBLY 2 - LOCATING PINS (4)
(3) Pry up 4 spring clips (Fig. 2) and lock cover to
housing.
(4) Install air duct to air cleaner cover and tighten
hose clamp to 3 N·m (30 in. lbs.) torque.
(5) If any other hose clamps were removed from air intake system, tighten them to 3.4 N·m (30 in. lbs.) torque.
(6) If any bolts were removed from air resonator housing or air intake tubing, tighten them to 4.5 N·m (40 in. lbs.) torque.
CYLINDER HEAD OPERATION—CYLINDER HEAD
The cylinder head closes the combustion chamber allowing the pistons to compress the air fuel mixture to the correct ratio for ignition. The valves located in the cylinder head open and close to either allow clean air into the combustion chamber or to allow the exhaust gases out, depending on the stroke of the engine.
DIAGNOSIS AND TESTING—CYLINDER HEAD GASKET FAILURE
A cylinder head gasket leak can be located between adjacent cylinders or between a cylinder and the adjacent water jacket. † Possible indications of the cylinder head gasket
leaking between adjacent cylinders are:
Fig.2AIRCLEANERHOUSINGCOVER
1 - CLAMP 2 - AIR DUCT 3 - AIR CLEANER COVER 4 - LOCATING TABS 5 - CLIPS (4)
Housing Assembly
(1) Loosen clamp (Fig. 2) and disconnect air duct
at air cleaner cover.
pins (Fig. 3).
(2) Lift entire housing assembly from 4 locating
INSTALLATION
(1) Install filter element into housing. (2) Position housing cover into housing locating
tabs (Fig. 2).
DR CYLINDER HEAD (Continued)
ENGINE - 5.7L
9 - 195
− Loss of engine power − Engine misfiring − Poor fuel economy † Possible indications of the cylinder head gasket leaking between a cylinder and an adjacent water jacket are:
− Engine overheating − Loss of coolant − Excessive steam (white smoke) emitting from
exhaust
− Coolant foaming
CYLINDER-TO-CYLINDER LEAKAGE TEST
To determine if an engine cylinder head gasket is leaking between adjacent cylinders, follow the proce- dures in Cylinder Compression Pressure Test in this section. An engine cylinder head gasket leaking between adjacent cylinders will result in approxi- mately a 50–70% reduction in compression pressure.
CYLINDER-TO-WATER JACKET LEAKAGE TEST
WARNING: USE EXTREME CAUTION WHEN THE ENGINE IS OPERATING WITH COOLANT PRES- SURE CAP REMOVED.
VISUAL TEST METHOD
With the engine cool, remove the coolant pressure cap. Start the engine and allow it to warm up until thermostat opens.
If a large combustion/compression pressure leak
exists, bubbles will be visible in the coolant.
COOLING SYSTEM TESTER METHOD
WARNING: WITH COOLING SYSTEM TESTER IN PLACE, PRESSURE WILL BUILD UP FAST. EXCES- SIVE PRESSURE BUILT UP, BY CONTINUOUS ENGINE OPERATION, MUST BE RELEASED TO A SAFE PRESSURE POINT. NEVER PERMIT PRES- SURE TO EXCEED 138 kPa (20 psi).
Install Cooling System Tester 7700 or equivalent to pressure cap neck. Start the engine and observe the tester’s pressure gauge. If gauge pulsates with every power stroke of a cylinder a combustion pressure leak is evident.
CHEMICAL TEST METHOD
Combustion leaks into the cooling system can also be checked by using Bloc-Chek Kit C-3685-A or equivalent. Perform test following the procedures supplied with the tool kit.
REMOVAL
work.
(1) Disconnect the battery negative cable. (2) Drain cooling system. (3) Remove the air cleaner resonator and duct
(4) Remove the generator. (5) Remove closed crankcase ventilation system. (6) Disconnect the evaporation control system. (7) Perform the Fuel System Pressure Release pro- cedure (Refer to 14 - FUEL SYSTEM/FUEL DELIV- ERY - STANDARD PROCEDURE). Disconnect the fuel supply line (Refer to 14 - FUEL SYSTEM/FUEL DELIVERY/QUICK CONNECT FITTING - STAN- DARD PROCEDURE).
(8) Disconnect heater hoses. (9) Remove cylinder head covers and gaskets. (10) Remove intake manifold and throttle body as
an assembly.
(11) Remove rocker arm assemblies and push rods.
Identify to ensure installation in original locations.
(12) Remove the head bolts from each cylinder head and remove cylinder heads. Discard the cylin- der head gasket.
Clean all surfaces of cylinder block and cylinder
Clean cylinder block front and rear gasket surfaces
using a suitable solvent.
CLEANING
heads.
INSPECTION
(1) Inspect the cylinder head for out-of-flatness, using a straightedge and a feeler gauge. If tolerances exceed 0.0508 mm (0.002 in.) replace the cylinder head.
(2) Inspect the valve seats for damage. Service the
valve seats as necessary.
(3) Inspect the valve guides for wear, cracks or looseness. If either condition exist, replace the cylin- der head.
(4) Inspect pushrods. Replace worn or bent push-
rods.
INSTALLATION
der heads.
(1) Clean all surfaces of cylinder block and cylin-
(2) Clean cylinder block front and rear gasket sur-
faces using a suitable solvent.
CAUTION: The head gaskets are not interchange- able between left and right sides. They are marked “L” and “R” to indicate left and right sides.
(3) Position new cylinder head gaskets onto the
cylinder block.
ENGINE - 5.7L
9 - 196
CYLINDER HEAD (Continued)CAUTION: The head gaskets are marked “TOP” to indicate which side goes up.
(4) Position cylinder heads onto head gaskets and
cylinder block.
(5) Tighten the cylinder head bolts in three steps (Fig. 4): † Step 1— Snug tighten M12 cylinder head bolts, in sequence, to 34 N·m (25 ft. lbs.) and M8 bolts to 20 N·m (15 ft. lbs.) torque. † Step 2— Tighten M12 cylinder head bolts, in sequence, to 54 N·m (40 ft. lbs.) and verify M8 bolts to 20 N·m (15 ft. lbs.) torque.. † Step 3— Turn M12 cylinder head bolts, in sequence, 90 degrees and tighten M8 bolts to 34 N·m (25 ft. lbs.) torque.
Fig.4CYLINDERHEADTIGHTENINGSEQUENCE (6) Install push rods and rocker arm assemblies in
their original position.
(7) Install the intake manifold and throttle body
(8) If required, adjust spark plugs to specifications.
assembly.
Install the plugs.
(9) Connect the heater hoses. (10) Install the fuel supply line. (11) Install the generator and drive belt. (12) Install cylinder head covers(Refer
to 9 - ENGINE/CYLINDER HEAD/CYLINDER HEAD COVER(S) - INSTALLATION).
(13) Connect the evaporation control system. (14) Install the air cleaner. (15) Fill cooling system. (16) Connect the negative cable to the battery. (17) Start engine check for leaks.
DR
CYLINDER HEAD COVER(S) REMOVAL
(1) Disconnect battery negative cable. (2) Disconnect coil on plug connectors.
CAUTION: The ground straps must be installed in the same location as removed. The covers are machined to accept the ground straps in those locations only.
(3) Remove cylinder head cover retaining bolts,
and ground straps.
(4) Remove cylinder head cover.
NOTE: The gasket may be used again, provided no cuts, tears, or deformation has occurred.
INSTALLATION
CAUTION: Do not use harsh cleaners to clean the cylinder head covers. Severe damage to covers may occur.
CAUTION: DO NOT allow other components includ- ing the wire harness to rest on or against the engine cylinder head cover. Prolonged contact with other objects may wear a hole in the cylinder head cover.
(1) Clean cylinder head cover and both sealing sur-
faces. Inspect and replace gasket as necessary.
(2) Install cylinder head cover and hand start all fas- teners. Verify that all double ended studs are in the cor- rect location and install left and right ground straps.
CAUTION: The ground straps must be installed in the same location as removed. The covers are machined to accept the ground straps in those locations only.
NOTE: The right hand ground strap is located on the front inboard stud. The left hand ground strap is located on the rear inboard stud.
(3) Tighten cylinder head cover bolts and double ended studs to 8 N·m (70 in. lbs). Begin torque sequence in the middle of head cover and torque bolts moving outward in a crisscross pattern from top to bottom.
(4) Install ignition coil on plug, and torque fasten-
ers to 12 N·m (105 in. lbs)
(5) Connect, ignition coil electrical connectors. (6) Install PCV hose. (7) Connect battery negative cable.
DR
ENGINE - 5.7L
9 - 197
INTAKE/EXHAUST VALVES & SEATS
DESCRIPTION
DESCRIPTION - VALVE GUIDES
The valve guides are made of powered metal and are pressed into the cylinder head. The guides are not replaceable or serviceable, and valve guide ream- ing is not recommended. If the guides are worn beyond acceptable limits, replace the cylinder heads.
DESCRIPTION
Both the intake and exhaust valves are made of steel. The intake valve is 50.93 mm (2.00 inches) in diameter and the exhaust valve is 39.53 mm (1.55
inches) in diameter. All valves use three bead lock keepers to retain the springs and promote valve rota- tion.STANDARD PROCEDURE - REFACING
NOTE: Valve seats that are worn or burned can be reworked, provided that correct angle and seat width are maintained. Otherwise the cylinder head must be replaced.
NOTE: When refacing valves and valve seats, it is important that the correct size valve guide pilot be used for reseating stones. A true and complete sur- face must be obtained.
(1) Using a suitable dial
indicator measure the center of the valve seat Total run out must not exceed 0.051 mm (0.002 in).
(2) Apply a small amount of Prussian blue to the valve seat, insert the valve into the cylinder head, while applying light pressure on the valve rotate the valve. Remove the valve and examine the valve face. If the blue is transferred below the top edge of the valve face, lower the valve seat using a 15 degree stone. If the blue is transferred to the bottom edge of the valve face, raise the valve seat using a 65 degree stone.
(3) When the seat is properly positioned the width of the intake seat must be 1.018 - 1.62 mm (0.0464 - 0.0637 in.) and the exhaust seat must be 1.48 - 1.92
mm (0.058 - 0.075 in.).(4) Check the valve spring installed height after refacing the valve and seat. The installed height for both intake and exhaust valve springs must not exceed 46.0 mm (1.81 in.).
VALVE FACE AND VALVE SEAT ANGLE CHART
DESCRIPTION
SPECIFICATION
SEAT WIDTH
INTAKE
1.018 - 1.62 mm
EXHAUST
(0.0464 - 0.0637 in.)
1.48 - 1.92 mm
(0.058 - 0.075 in.)
FACE ANGLE (INT. AND EXT.)
SEAT ANGLE (INT. AND EXT.)
45° - 451⁄2°
441⁄2° - 45°
(5) The valve seat must maintain an angle of 44.5
– 45.0 degrees angle.
(6) The valve face must maintain a face angle of
45.0 – 45.5 degrees angle (Fig. 5).
Fig.5ValveAssemblyConfiguration
1 - VALVE LOCKS (3–BEAD) 2 - RETAINER 3 - VALVE STEM OIL SEAL 4 - INTAKE VALVE 5 - EXHAUST VALVE 6 - VALVE SPRING
ENGINE - 5.7L
9 - 198
INTAKE/EXHAUST VALVES & SEATS (Continued) REMOVAL(3) Remove the rocker shafts. Note location for
to 9 -
reassembly.
DR
(1) Remove the cylinder head (Refer ENGINE/CYLINDER HEAD - REMOVAL).
(2) Compress valve springs using Valve Spring Compressor Tool special tool # C-3422and adapter 8464.
(3) Remove valve retaining locks, valve spring
retainers, valve stem seals and valve springs.
(4) Before removing valves, remove any burrs from valve stem lock grooves to prevent damage to the valve guides. Identify valves to ensure installation in original location.
INSTALLATION
(1) Clean valves
thoroughly. Discard burned,
warped and cracked valves.
(2) Remove carbon and varnish deposits from inside of valve guides with a reliable guide cleaner. (3) Measure valve stems for wear. If wear exceeds
0.051 mm (0.002 inch), replace the valve.
(4) Coat valve stems with lubrication oil and insert
them in cylinder head.
(5) If valves or seats are reground, check valve stem height. If valve is too long, replace cylinder head.
(6) Install new seals on all valve guides. Install
valve springs and valve retainers.
(7) Compress valve springs with Valve Spring Compressor Tool special tool # C- 3422and adapter 8464, install locks and release tool. If valves and/or seats are ground, measure the installed height of springs. Make sure the measurement is taken from bottom of spring seat in cylinder head to the bottom surface of spring retainer.
(8) Install cylinder head (Refer to 9 - ENGINE/
CYLINDER HEAD - INSTALLATION).
ROCKER ARM / ADJUSTER ASSY REMOVAL
(1) Remove cylinder head cover.(Refer
to 9 - ENGINE/CYLINDER HEAD/CYLINDER HEAD COVER(S) - REMOVAL)
(2) Loosen the rocker shafts using the following sequence: Center, center-left, center-right, left, right,.
CAUTION: The rocker shaft assemblies are not interchangeable between intake and exhaust. The intake rocker arms are marked with an “I”.
CAUTION: The longer push rods are for the exhaust side, and the shorter push rods are for intake side.
(4) Remove the pushrods. Note pushrod location
for reassembly.
INSTALLATION
CAUTION: The longer push rods are for the exhaust side, and the shorter push rods are for intake side.
(1) Install the push rods in the same order as
removed.
CAUTION: Verify that pushrod is installed into rocker arm and lifter correctly while installing rocker shaft assembly. Recheck after rocker shaft has been torqued to specification.
CAUTION: The rocker shaft assemblies are not interchangeable between intake and exhaust. The intake rocker arms are marked with the letter “I”.
(2) Install rocker shaft assemblies in the same
order as removed.
CAUTION: Ensure that hold downs and rocker arms are not overlapped when torquing bolts.
(3) Tighten the rocker shaft bolts to 22 N·m (195
in. lbs.) torque,using the following sequence: Center, center-right, center-left, right, left.CAUTION: DO NOT rotate or crank the engine dur- ing or immediately after rocker arm installation. Allow the hydraulic roller tappets adequate time to bleed down (about 5 minutes).
(4) Install
cylinder head cover
to 9 - ENGINE/CYLINDER HEAD/CYLINDER HEAD COVER(S) - INSTALLATION).
(Refer
VALVE STEM SEALS DESCRIPTION
The valve guide seals are made of rubber and incorporate an integral steel valve spring seat. The integral garter spring maintains consistent lubrica- tion control to the valve stems.
DR
ENGINE - 5.7L
9 - 199
VALVE SPRINGS REMOVAL
(1) Disconnect negative battery cable. (2) Remove air cleaner assembly. (3) Remove air intake resonator. (4) Remove spark plug cables. (5) Remove ignition coil connectors (Fig. 6).
Fig.6IGNITIONCOILR/I—5.7LV-8
1 - SLIDE LOCK (SLIDE OUTWARD TO UNLOCK) 2 - SPARK PLUG CABLE (TO OPPOSITE CYLINDER BANK SPARK PLUG) 3 - RELEASE LOCK / TAB (PUSH HERE) 4 - ELEC. CONNECTOR 5 - IGNITION COIL 6 - COIL MOUNTING BOLTS (2) 7 - SPARK PLUG CABLE (TO OPPOSITE CYLINDER BANK IGNITION COIL)
(6) Remove ignition coils. (7) Remove one spark plug. (8) Remove valve cover.
CAUTION: The piston must be at TDC, and both valves closed on the cylinder to be serviced.
(9) Remove exhaust/intake rocker arm shafts. (10) Install spring compressor, special tool# 9065.
NOTE: All valve springs and seals are removed in the same manner.
(11) Charge cylinder with air.
NOTE: Tap the top of the valve spring retainer to loosen the spring retainers locks.
(12) Compress valve spring and remove valve
(13) Release spring compressor and remove valve
retainer locks.
spring.
NOTE: The valve springs are interchangeable between intake and exhaust.
(14) Remove valve seal.
INSTALLATION
(1) Install valve seal. (2) Install valve spring. (3) Using special tool# 9065, compress valve spring
and install valve spring retainer and locks.
(4) Release air charge in cylinder. (5) Remove spring compressor tool # 9065.
CAUTION: Verify that the pushrods are fully seated into lifter and rocker arm. Recheck after rocker arm shaft has been torqued to specification.
(6) Install rocker arm shaft and pushrods(Refer to 9 - ENGINE/CYLINDER HEAD/ROCKER ARM / ADJUSTER ASSY - INSTALLATION).
(7) Tighten the rocker shaft bolts to 22 N·m (195
in. lbs.) torque,using the following sequence: Center, center-right, center-left, right, left.(8) Install cylinder head cover. (9) Tighten cylinder head cover bolts and double ended studs(Refer to 9 - ENGINE/CYLINDER HEAD/CYLINDER HEAD COVER(S) - INSTALLA- TION) .
(10) Install spark plugs. (11) Install ignition coil on plug, and torque fasten-
ers to 12 N·m (105 in. lbs)
(12) Install ignition coil connectors. (13) Install spark plug cables. (14) Install air intake resonator. (15) Install air cleaner assembly. (16) Connect negative battery cable.
9 - 200
ENGINE - 5.7L
ENGINE BLOCK CLEANING
Thoroughly clean the oil pan and engine block gas-
ket surfaces. Use compressed air to clean out: † The galley at the oil filter adaptor hole. † The front and rear oil galley holes. † The feed holes for the crankshaft main bearings. Once the block has been completely cleaned, apply Loctite PST pipe sealant with Teflon 592 to the threads of the front and rear oil galley plugs. Tighten the 1/4 inch NPT plugs to 20 N·m (177 in. lbs.) torque. Tighten the 3/8 inch NPT plugs to 27 N·m (240 in. lbs.) torque.
INSPECTION
(1) It is mandatory to use a dial bore gauge to measure each cylinder bore diameter. To correctly select the proper size piston, a cylinder bore gauge, capable of reading in 0.003 mm (.0001 in.) INCRE- MENTS is required. If a bore gauge is not available, do not use an inside micrometer (Fig. 7).
Fig.7BOREGAUGE-TYPICAL
1 - FRONT 2 - BORE GAUGE 3 - CYLINDER BORE 4 - 38 MM (1.5 in)
(2) Measure the inside diameter of the cylinder bore at three levels below top of bore. Start perpen- dicular (across or at 90 degrees) to the axis of the crankshaft and then take two additional reading.
DR
(3) Measure the cylinder bore diameter crosswise to the cylinder block near the top of the bore. Repeat the measurement near the middle of the bore, then repeat the measurement near the bottom of the bore. (4) Determine taper by subtracting the smaller
diameter from the larger diameter.
(5) Rotate measuring device 90° and repeat steps
above.
(6) Determine out-of-roundness by comparing the
difference between each measurement.
(7) If cylinder bore taper does not exceed 0.025
mm (0.001 inch) and out-of-roundness does not exceed 0.025 mm (0.001 inch), the cylinder bore can be honed. If the cylinder bore taper or out- of-round condition exceeds these maximum limits, the cylinder block must be replaced. A slight amount of taper always exists in the cylinder bore after the engine has been in use for a period of time.CAMSHAFT & BEARINGS (IN BLOCK)
REMOVAL
REMOVAL - CAMSHAFT CORE HOLE PLUG
CAUTION: Do not damage the rear surface of the camshaft or the core plug sealing surface, when removing the core plug.
(1) Remove the rear cam bearing core plug.
REMOVAL - CAMSHAFT
(1) Remove the battery negative cable. (2) Remove the air cleaner assembly. (3) Drain coolant. (4) Remove the accessory drive belt. (5) Remove the generator. (6) Remove the A/C compressor, and set aside (7) Remove the radiator (Refer to 7 - COOLING/
ENGINE/RADIATOR - REMOVAL).
(8) Remove intake manifold(Refer to 9 - ENGINE/
MANIFOLDS/INTAKE MANIFOLD - REMOVAL).
(9) Remove cylinder head covers(Refer to 9 - ENGINE/CYLINDER HEAD/CYLINDER HEAD COVER(S) - REMOVAL).
(10) Remove both left and right cylinder heads(Re- fer to 9 - ENGINE/CYLINDER HEAD - REMOVAL). (11) Remove the oil pan(Refer to 9 - ENGINE/LU-
BRICATION/OIL PAN - REMOVAL).
(12) Remove
to 9 - ENGINE/VALVE TIMING/TIMING BELT / CHAIN COVER(S) - REMOVAL).
timing case
cover(Refer
(13) Remove the oil pick up tube.
DR CAMSHAFT & BEARINGS (IN BLOCK) (Continued)
ENGINE - 5.7L
9 - 201
(14) Remove the oil pump(Refer to 9 - ENGINE/
LUBRICATION/OIL PUMP - REMOVAL).
(15) Remove timing chain(Refer to 9 - ENGINE/ BELT/CHAIN AND
VALVE TIMING/TIMING SPROCKETS - REMOVAL).
(16) Remove
camshaft
tensioner/thrust
plate
assembly.
NOTE: Identify lifters to ensure installation in origi- nal location.
(17) Remove the lifters and retainer assembly. (18) Install a long bolt into front of camshaft to aid in removal of the camshaft. Remove camshaft, being careful not to damage cam bearings with the cam lobes.
INSPECTION
(1) The cam bearings are not serviceable. Do not
attempt to replace cam bearings for any reason.
INSTALLATION
INSTALLATION - CAMSHAFT CORE HOLE PLUG
CAUTION: The new core hole plug must be installed to the proper depth or camshaft damage could develope. The plug must be installed squarely in the bore.
(1) Install a new core hole plug at the rear of cam- shaft, using special tool # 9048. Clean plug and apply mopart lock and seal adhesive to the edge of the plug, before installing. The plug must be installed to a depth of + / - 0.25mm from the end of the machined bevel, that is the end of the bevel that is closest to the cam bearing.
INSTALLATION - CAMSHAFT
(1) Lubricate camshaft lobes and camshaft bearing
journals and insert the camshaft
(2) Install
camshaft Tensioner plate assembly.
Tighten bolts to 28 N·m (250 in. lbs.) torque.
(3) Install timing chain and sprockets(Refer to 9 - ENGINE/VALVE TIMING/TIMING BELT/CHAIN AND SPROCKETS - INSTALLATION).
(4) Measure camshaft end play(Refer
to 9 - ENGINE - SPECIFICATIONS). If not within limits install a new thrust plate.
(5) Install the oil pump(Refer to 9 - ENGINE/LU-
BRICATION/OIL PUMP - INSTALLATION).
(6) Install the oil pick up tube. (7) Each lifter reused must be installed in the same position from which it was removed. When camshaft is replaced, all of the lifters must be replaced.
(8) Install lifters and retainer assembly. (9) Install both left and right cylinder heads(Refer to 9 - ENGINE/CYLINDER HEAD - INSTALLA- TION).
(10) Install pushrods (11) Install rocker arms(Refer to 9 - ENGINE/CYL- INDER HEAD/ROCKER ARM / ADJUSTER ASSY - INSTALLATION).
(12) Install
ENGINE/VALVE TIMING/TIMING BELT / CHAIN COVER(S) - INSTALLATION).
cover(Refer
timing
case
to
(13) Install the oil pan(Refer to 9 - ENGINE/LU-
(14) Install
BRICATION/OIL PAN - INSTALLATION). cylinder head covers(Refer
to 9 - ENGINE/CYLINDER HEAD/CYLINDER HEAD COVER(S) - INSTALLATION).
(15) Install intake manifold(Refer to 9 - ENGINE/ INSTALLA-
MANIFOLDS/INTAKE MANIFOLD - TION).
(16) Install the A/C compressor, and set aside (17) Install the generator. (18) Install the accessory drive belt. (19) Install the radiator (Refer to 7 - COOLING/
ENGINE/RADIATOR - INSTALLATION).
(20) Install the air cleaner assembly. (21) Install the battery negative cable. (22) Refill coolant. (23) Refill engine oil. (24) Start engine and check for leaks.
CRANKSHAFT REMOVAL
(1) Remove the vibration damper (Refer to 9 - ENGINE/ENGINE BLOCK/VIBRATION DAMPER - REMOVAL).
(2) Remove the timing chain cover(Refer to 9 - ENGINE/VALVE TIMING/TIMING BELT / CHAIN COVER(S) - REMOVAL).
(3) Remove the oil pan(Refer to 9 - ENGINE/LU-
BRICATION/OIL PAN - REMOVAL).
(4) Remove the oil pump pickup. (5) Remove the oil pump(Refer to 9 - ENGINE/LU-
BRICATION/OIL PUMP - REMOVAL).
(6) Remove the timing drive(Refer to 9 - ENGINE/ BELT/CHAIN AND
TIMING/TIMING VALVE SPROCKETS - REMOVAL).
(7) Identify rod bearing caps before removal.
Remove rod bearing caps with bearings.
(8) Identify main bearing caps before removal. Remove main bearing caps and bearings one at a time.
(9) Remove the thrust washers. (10) Remove the crankshaft out of the block.
ENGINE - 5.7L
9 - 202
CRANKSHAFT (Continued)DR
(11) Remove the rear oil seal retainer(Refer to 9 - ENGINE/ENGINE BLOCK/CRANKSHAFT REAR OIL SEAL RETAINE - REMOVAL).
(12) Remove and discard the crankshaft rear oil
(13) Remove and discard the front crankshaft oil
seal.
seal.
INSTALLATION
(1) Select the proper main bearings(Refer to 9 - ENGINE/ENGINE BLOCK/CRANKSHAFT MAIN BEARINGS - STANDARD PROCEDURE).
(2) Install main bearings in block and caps, and
lubricate bearings.
(3) Position the crankshaft into the cylinder block. (4) Install the thrust washers.
NOTE: The main cap crossbolts are torqued after final torque of the main cap bolts. Always use a new washer/seal on crossbolts.
(5) Clean and oil all cap bolts. Install all main bearing caps. Install all cap bolts and alternately tighten in two steps using the following sequence (Fig. 8). † Step 1 – 27 N·m ( 20ft. lbs.) torque. † Step 2 – Turn main cap bolts an additional 90°. (6) Install the crossbolts with new washer/gasket.
Fig.8MAINCAPTIGHTENINGSEQUENCE
1 - Stud Location
Starting with crossbolt A (Fig. 8) torque each cross- bolt to 28 N·m torque.
(7) Repeat crossbolt torque procedure.
(8) Measure crankshaft end play(Refer to 9 - ENGINE/ENGINE BLOCK/CRANKSHAFT MAIN BEARINGS - STANDARD PROCEDURE).
(9) Position the connecting rods onto the crank- shaft and install the rod bearing caps(Refer to 9 - ENGINE/ENGINE BLOCK/PISTON & CONNECT- ING ROD - INSTALLATION).
(10) Install timing drive(Refer to 9 - ENGINE/ BELT/CHAIN AND
TIMING/TIMING
VALVE SPROCKETS - INSTALLATION).
(11) Install oil pump and pickup(Refer to 9 - ENGINE/LUBRICATION/OIL PUMP - INSTALLA- TION).
(12) Install the timing chain cover(Refer to 9 - ENGINE/VALVE TIMING/TIMING BELT / CHAIN COVER(S) - INSTALLATION).
(13) Install the oil pan(Refer to 9 - ENGINE/LU-
BRICATION/OIL PAN - INSTALLATION).
(14) Install the rear main seal and retainer. (15) Install the vibration damper. (16) Install the engine(Refer to 9 - ENGINE -
INSTALLATION).
CRANKSHAFT MAIN BEARINGS STANDARD PROCEDURE - CRANKSHAFT MAIN BEARING - FITTING
MAIN BEARING JOURNAL DIAMETER (CRANKSHAFT REMOVED)
Crankshaft removed from the cylinder block. Clean the oil off the main bearing journal. Determine the maximum diameter of the journal with a micrometer. Measure at two locations 90° apart at each end of the journal.
The maximum allowable taper is 0.008mm (0.0004
inch.) and maximum out of round is 0.005mm (0.0002
inch). Compare the measured diameter with the jour- nal diameter specification (Main Bearing Fitting Chart). Select inserts required to obtain the specified bearing-to-journal clearance.CRANKSHAFT MAIN BEARING SELECTION
The main bearings are “select fit” to achieve proper oil clearances. For main bearing selection, the crank- shaft counterweight has grade identification marks stamped into it. These marks are read from left to right, corresponding with journal number 1, 2, 3, 4
and 5.NOTE: Service main bearings are coded. These codes identify what size (grade) the bearing is.
DR CRANKSHAFT MAIN BEARINGS (Continued)
MAIN BEARING SELECTION CHART - 5.7L
GRADE
MARKING
SIZE mm
(in.)
FOR USE WITH
JOURNAL SIZE
0.008 mm
64.988–64.995 mm
U/S
(0.0004 in.)
(2.5585– 2.5588in.)
U/S
NOMINAL
64.996–65.004 mm (2.5588–2.5592 in.)
0.008 mm
65.005–65.012 mm
O/S
(0.0004 in.)
(2.5592–2.5595 in.)
O/S
INSPECTION
Wipe the inserts clean and inspect for abnormal wear patterns and for metal or other foreign material imbedded in the lining. Normal main bearing insert wear patterns are illustrated (Fig. 9).
Fig.9MainBearingWearPatterns
1 - UPPER INSERT 2 - NO WEAR IN THIS AREA 3 - LOW AREA IN BEARING LINING 4 - LOWER INSERT
NOTE: If any of the crankshaft journals are scored, the crankshaft must be repaired or replaced.
Inspect the back of the inserts for fractures, scrap-
ings or irregular wear patterns.
Inspect the upper insert locking tabs for damage. Replace all damaged or worn bearing inserts.
ENGINE - 5.7L
9 - 203
CRANKSHAFT OIL SEAL - FRONT REMOVAL
(1) Disconnect negative cable from battery. (2) Remove accessory drive belt
(Refer to 7 - COOLING/ACCESSORY DRIVE/DRIVE BELTS - REMOVAL).
(3) Drain cooling system (Refer to 7 - COOLING -
STANDARD PROCEDURE).
(4) Remove upper radiator hose. (5) Remove radiator shroud attaching fasteners. (6) Remove radiator cooling fan and shroud (Refer - COOLING/ENGINE/RADIATOR FAN -
to REMOVAL).
(7) Remove crankshaft damper bolt. (8) Remove damper using Special Tools 8513A
Insert and 8454 Three Jaw Puller.
(9) Using Special Tool 9071, remove crankshaft
front seal.
INSTALLATION
CAUTION: The front crankshaft seal must be installed dry. Do not apply lubricant to sealing lip or to outer edge.
(1) Using Special Tool 8348 and 8512A,
crankshaft front seal.
install
CAUTION: To prevent severe damage to the Crank- shaft or Damper, thoroughly clean the damper bore and the crankshaft nose before installing Damper.
(2) Install vibration damper (Refer to 9 - ENGINE/ ENGINE BLOCK/VIBRATION DAMPER - INSTAL- LATION).
(3) Install radiator cooling fan and shroud (Refer - COOLING/ENGINE/RADIATOR FAN -
to INSTALLATION).
(4) Install upper radiator hose. (5) Install accessory drive belt refer (Refer to 7 - COOLING/ACCESSORY DRIVE/DRIVE BELTS - INSTALLATION).
(6) Refill cooling system (Refer to 7 - COOLING -
STANDARD PROCEDURE).
(7) Connect negative cable to battery.
9 - 204
ENGINE - 5.7L
DR
CRANKSHAFT OIL SEAL - REAR DIAGNOSIS AND TESTING - REAR SEAL AREA LEAKS
Since it is sometimes difficult to determine the source of an oil leak in the rear seal area of the engine, a more involved inspection is necessary. The following steps should be followed to help pinpoint the source of the leak.
If the leakage occurs at the crankshaft rear oil seal
area:
(1) Disconnect the battery. (2) Raise the vehicle. (3) Remove torque converter or clutch housing cover and inspect rear of block for evidence of oil. Use a black light to check for the oil leak:
