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NOTICE: When fasteners are removed, always reinstall them at the same location from which they were
removed. If a fastener needs to be replaced, use the correct part number fastener for that application. If
the correct part number fastener is not available, a fastener of equal size and strength (or stronger) may
be used. Fasteners that are not reused and those requiring thread locking compound will be called out.
The correct torque value m ust be used when installing fasteners that require it. If the above conditions
are not followed, parts or system damage could result.
SUBJECT
General D escription......................................................................................................................................................6A3- 3
Engine C onstruction................................................................................................................................................ 6A3- 3
Cylinder B lock........................................................................................................................................................6A3- 3
Cylinder H eads................................................................... ...................................................................................6A3- 3
Crankshaft............................................................................................................................................................... 6A3- 3
C am sh aft..................................................................................................................................................................6A3- 3
Pistons and Connecting R o d s.......................................................................................................................... 6A3- 3
Balance S h a ft.........................................................................................................................................................6A3- 3
Valve T ra in .............................................................................................................................................................. 6A3- 3
Intake M anifold.......................................................................................................................................................6A3- 3
Engine Lubrication............................................. ..................................................................................................... 6A3- 3
Disassembly of the Engine................................. ...................................................................................................... 6A3-14
Tools and Shop Equipment................................................. ................................................................................. 6A3-14
Accessory Removal.................................................................................................................................................. 6A3-14
C leaning....................................................................................................................................................................... 6A3-14
Draining the E n g in e................................................................................................................................................. 6A3-14
EGR Valve R em oval................................................................................................................................................. 6A3-14
Exhaust Manifold Removal..................................................................................................................................... 6A3-14
Rocker Arm Cover R em oval..................................................................................................................................6A3-14
Intake Manifold R em oval........................................................ ............................................................................... 6A3-14
Valve Train Component R em oval......................................................................................................................... 6A3-15
Cylinder Head R em oval...........................................................................................................................................6A3-15
Torsional Damper R em oval................................................................... ................................................................ 6A3-15
Oil Pan Rem oval........................................................................................................................................................6A3-15
Oil Pump Removal.................................................................................................................................................... 6A3-16
Front Cover Rem oval............................................................................................................................................... 6A3-16
Camshaft R em oval................................................................................................................................................... 6A3-16
Balance Shaft Removal........................................................................................................................................... 6A3-16
Piston And Connecting Rod Rem oval................................................................................................................ 6A3-16
Flywheel Removal......................................................................................................................................................6A3-18
Crankshaft Rear Oil Seal R em o val......................................................................................................................6A3-18
Crankshaft Rear Oil Seal Retainer R e m o val............................................................................................. ...... 6A3-19
Crankshaft R em oval................................................................................................................................................. 6A3-19
Main Bearing Removal (Without Removing C rankshaft).............................................................................. 6A3-20
Cleaning, Inspection, and Repair............................................................................................................................. 6A3-20
B lo c k ............................................... ...................................... ......................................................................................6A3-20
Cylinder Bore.......................................................................................................................................................... 6A3-20
Piston And Connecting Rod Assem bly..............................................................................................................6A3-21
Intake and Exhaust M anifolds.............................................................................................................................. 6A3-21
C am shaft...................................................................................................................................................................... 6A3-22
Camshaft Bearings................................................................................................................................................... 6A3-22
SECTION 6A3
4.3L V6
RPO LB4, VIN Z
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