GMC 1990 Light Truck Repair Manual page 443

SUBJECT
Description.................................................................................................................................................................... 6A3- 2
Engine Lubrication....................................................................................................................................................6A3- 2
Disassembly.................................................................................................................................................................. 6A3- 5
Tools and Shop Equipment..................................................................................................................................... 6A3- 5
Accessory Removal..................................................................................................................................................6A3- 5
Cleaning.................................................................................................................................................................... 6A3- 5
Draining The Engine................................................................................................................................................6A3- 5
EGR Valve Removal..................................................................................................................................................6A3- 5
Exhaust Manifold Removal..................................................................................................................................... 6A3- 5
Rocker Arm Cover Removal................................................................................................................................... 6A3- 6
Intake Manifold Removal......................................................................................................................................... 6A3- 6
Valve Train Component Removal...........................................................................................................................6A3- 6
Cylinder Head Removal........................................................................................................................................... 6A3- 7
Torsional Damper Removal..................................................................................................................................... 6A3- 7
Oil Pan Removal........................................................................................................................................................6A3- 7
Oil Pump Removal....................................................................................................................................................6A3- 7
Front Cover Removal................................................................................................................................................6A3- 7
Camshaft Removal....................................................................................................................................................6A3- 7
Piston and Connecting Rod R em oval.................................................................................................................. 6A3- 8
Flywheel Removal....................................................................................................................................................6A3- 9
Rear Crankshaft Oil Seal Removal.........................................................................................................................6A3- 9
Rear Crankshaft Oil Seal Retainer Removal........................................................................................................ 6A3- 9
Crankshaft Removal..................................................................................................................................................6A3- 9
Main Bearing Removal (Without Removing Crankshaft)................................................................................... 6A3-10
Cleaning, Inspection, and Repair...............................................................................................................................6A3-10
Block...........................................................................................................................................................................6A3-10
Piston and Connecting Rod A ssem bly................................................................................................................ 6A3-10
Intake and Exhaust Manifolds.................................................................................................................................6A3-11
Camshaft.................................................................................................................................................................... 6A3-11
Camshaft Bearings....................................................................................................................................................6A3-11
Timing Chain and Sprockets................................................................................................................................... 6A3-11
Front Cover................................................................................................................................................................ 6A3-12
Water P um p.............................................................................................................................................................. 6A3-12
Oil Pan and Rocker Arm Covers.............................................................................................................................6A3-12
Oil Pump.................................................................................................................................................................... 6A3-12
Valve Train Components......................................................................................................................................... 6A3-13
Hydraulic Lifters........................................................................................................................................................6A3-13
Cylinder Head............................................................................................................................................................ 6A3-13
Thermostat and Water O utlet.................................................................................................................................6A3-16
Crankshaft and Bearings......................................................................................................................................... 6A3-16
Assembly of E n g in e....................................................................................................................................................6A3-17
Prior to Assem bly....................................................................................................................................................6A3-17
Crankshaft and Main Bearing Installation............................................................................................................ 6A3-17
Rear Crankshaft Oil Seal Retainer Installation.................................................................................................... 6A3-17
Rear Crankshaft Oil Seal Installation.................................................................................................................... 6A3-18
Camshaft, Timing Chain and Sprocket Installation............................................................................................6A3-18
SECTION 6A3
4.3 LITER V-6
CONTENTS
6A3-1
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