Chevrolet 1991 Light Duty Truck Repair Manual page 453

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 must be used when installing fasteners that require it. If the above conditions are not
followed, parts or system damage could result.
SUBJECT
Description ................................................................................................................................................................ 6A5- 2
Engine id e n tific a tio n ............................................................................................................................................ 6A5- 2
Disassembly .............................................................................................................................................................. 6A5- 5
Tools and Shop Equipm ent................................................................................................................................ 6A5- 5
Accessory Rem oval.............................................................................................................................................. 6A5- 5
Cleaning ................................................................................................................................................................. 6A5- 5
Draining the Engine.............................................................................................................................................. 6A5- 5
Exhaust Manifold Rem oval..................................................................................................................................6A5- 6
Coolant Pump R em oval.......................................................................................................................................6A5- 7
Intake Manifold Removal......................................................................................................................................6A5- 7
Rocker Arm Cover Rem oval...............................................................................................................................6A5- 8
Valve Train Component Removal........................................................................................................... ........... 6A5- 8
Cylinder Head Removal................................................................................................................................ .
Torsional Damper Removal................................................................................................................................. 6A5-10
Oil Pan Removal.....................................................................................................................................................6A5-10
Oil Pump Removal................................................................................................................................................ 6A5-10
Front Cover Removal............................................................................................................................................ 6A5-10
Tim ing Chain and Camshaft Sprocket R em oval........................................................................................... 6A5-11
Camshaft Removal................................................................................................................................................ 6A5-11
Piston and Connecting Rod Removal.............................................................................................................. 6A5-11
Flywheel Removal................................................................................................................................................. 6A5-13
Rear Crankshaft Oil Seal Retainer Removal (5.0L and 5.7L E ngines).................................................... 6A5-13
Crankshaft Removal.............................................................................................................................................. 6A5-14
Cleaning, Inspection, and R e p air......................................................................................................................... 6A5-14
Block ....................................................................................................................................................................... 6A5-14
Piston and Connecting Rod Assem blies......................................................................................................... 6A5-15
Intake and Exhaust M anifold.............................................................................................................................. 6A5-16
Camshaft ................................................................................................................................................................ 6A5-16
Camshaft B ea ring s............................................................................................................................................... 6A5-16
Tim ing Chain and Sprockets.............................................................................................................................. 6A5-16
Front C o ve r.............................................................................................................................................................6A5-17
Coolant Pum p.........................................................................................................................................................6A5-18
Oil Pan and Rocker Arm C overs...................................................................................................................... 6A5-18
Oil P u m p ................................................................................................................................................................. 6A5-18
Valve Ttain C om ponents......................................................................................................................................6A5-19
Cylinder Head.........................................................................................................................................................6A5-20
Therm ostat and Water O u tle t............................................................................................................................. 6A5-23
SECTION 6A5
V8 ENGINES
5.0L (305 CID)
S.7L (350 CID)
7.4L (454 CID)
CONTENTS
V8 ENGINES 6A5-1
PAGE
6A5- 9