GMC 1989 Light Duty Truck Repair Manual page 455

S U B J E C T
Description....................................................................................................................................................................................6 A 4 - 2
Disassembly.................................................................................................................................................................................. 6 A 4- 4
Tools and Shop Equipm ent..................................................................................................................................................6 A 4- 4
Accessory R em oval................................................................................................................................................................6 A 4 - 4
C le a n in g .................................................................................................................................................................................... 6 A 4 - 4
Parts Identification..................................................................................................................................................................6 A 4 - 4
Draining the Engine................................................................................................................................................................6 A 4 - 8
Air Manifold and Injection Tube R em oval.......................................................................................................................6 A 4 - 8
Manifold R e m o v a l..................................................................................................................................................................6 A 4- 8
Thermostat Housing R e m o v a l........................................................................................................................................... 6 A 4 - 9
Water Pump R e m o v a l........................................................................................................................................................... 6 A 4 - 9
Valve Train Component R em oval...................................................................................................................................... 6 A 4 - 9
Cylinder Head R em oval.........................................................................................................................................................6A 4-10
Torsional Damper Rem oval..................................................................................................................................................6 A 4-10
Oil Pan Removal...................................................................................................................................................................... 6A 4 -1 0
Oil Pump R em oval..................................................................................................................................................................6A 4 -1 0
Timing Gear Cover R em oval................................................................................................................................................6A4-11
Piston and Connecting Rod R e m o v a l............................................................................................................................. 6A4-11
Flywheel R e m o v a l..................................................................................................................................................................6A4-11
Crankshaft Removal................................................................................................................................................................6 A 4-12
Crankshaft Rear Oil Seal Removal (Without Removing Crankshaft).......................................................................6 A 4-12
Main Bearing Removal (Without Removing C ra n k s h a ft)........................................................................................... 6 A 4-12
Camshaft Rem oval..................................................................................................................................................................6 A 4-13
Cleaning, Inspection, and Repair........................................................................................................................................... 6A 4 -1 4
B lo ck...........................................................................................................................................................................................6A 4 -1 4
Main Bearing Cap R eplacem ent.........................................................................................................................................6 A 4-14
Cylinder B o re s ........................................................................................................................................................................ 6 A 4-15
Piston and Connecting Rod A ssem blies......................................................................................................................... 6 A 4-15
Intake and Exhaust Manifolds............................................................................................................................................. 6A 4-15
Cam shaft....................................................................................................................................................................................6 A 4-16
Camshaft Bearings..................................................................................................................................................................6A 4 -1 7
Timing Gear Cover..................................................................................................................................................................6 A 4-17
Water P u m p ............................................................................................................................................................................. 6A 4 -1 7
Oil Pan and Rocker Arm Cover........................................................................................................................................... 6 A 4-18
Oil P u m p ....................................................................................................................................................................................6A 4-18
Valve Train Com ponents...................................................................................................................................................... 6 A 4-19
Cylinder H ead ...........................................................................................................................................................................6A 4 -1 9
Thermostat and Housing...................................................................................................................................................... 6A4-21
Torsional Damper....................................................................................................................................................................6A 4-22
Crankshaft and Bearings......................................................................................................................................................6A 4-22
Oil Filter Relief Valve R eplacem ent..................................................................................................................................6 A 4-23
Assembly of E n g in e ................................................................................................................................................................. 6A 4 -2 3
Prior to A s s e m b ly ..................................................................................................................................................................6 A 4-23
Crankshaft Rear Oil Seal Installation............................................................................................................................... 6A 4 -2 3
Main Bearing Installation (With Crankshaft In s ta lle d )................................................................................................6A 4 -2 5
Crankshaft and Main Bearing In s ta lla tio n ...................................................................................................................... 6 A 4-25
Camshaft Installation............................................................................................................................................................. 6 A 4-26
Timing Gear Cover Installation...........................................................................................................................................6 A 4-26
Torsional Damper Installation.......................................................................
Piston and Connecting Rod In s ta lla tio n .........................................................................................................................6 A 4-27
Oil Pump Installation............................................................................................................................................................. 6A 4-28
SECTION 6A4
4.8 LITER L6
CONTENTS
.................................................................. 6A 4 -2 7
6A4-1
P A G E