GMC 1989 Light Duty Truck Repair Manual page 357

SUBJECT
D escription.................................................................................................................................................................................... 6 A 1 - 2
Engine Lubrication.................................................................................................................................................................. 6 A 1 - 2
Disassembly of the E ngine...................................................................................................................................................... 6 A 1 - 4
Tools and Shop Equipm ent.................................................................................................................................................. 6 A 1 - 4
Accessory R em o val................................................................................................................................................................6 A 1 - 4
C le a n in g .................................................................................................................................................................................... 6 A 1 - 4
Parts Identification.................................................................................................................................................................. 6 A 1 - 4
Draining the En g in e................................................................................................................................................................6 A 1 - 4
Intake Manifold R em oval...................................................................................................................................................... 6 A 1 - 6
Exhaust Manifold R e m o v a l.................................................................................................................................................. 6 A 1 - 6
Thermostat Housing R e m o v a l........................................................................................................................................... 6 A 1 - 6
Water Pump R e m o v a l........................................................................................................................................................... 6 A 1 - 6
Valve Train Component R em oval...................................................................................................................................... 6 A 1 - 9
Cylinder Head R em oval.........................................................................................................................................................6A 1 -1 0
Crankshaft Pulley Hub R em oval.........................................................................................................................................6A 1 -1 0
Oil Pan Removal...................................................................................................................................................................... 6A1-11
Oil Pump Driveshaft R em oval............................................................................................................................................. 6A1-11
Oil Pump R em oval.................................................................................................................................................................. 6A1-11
Front Cover Rem oval............................................................................................................................................................. 6A1-11
Piston and Connecting Rod R e m o v a l............................................................................................................................. 6A1-11
Flywheel R e m o v a l.................................................................................................................................................................. 6A 1 -1 2
Crankshaft Removal................................................................................................................................................................6A 1 -1 2
Crankshaft Rear Oil Seal Removal (Without Removing C rankshaft).......................................................................6 A 1 -1 2
Main Bearing Removal (Without Removing the C ran k sh a ft).................................................................................... 6A 1-13
Camshaft Rem oval.................................................................................................................................................................. 6A 1-13
Cleaning, Inspection, and Repair........................................................................................................................................... 6A 1-14
B lo ck ........................................................................................................................................................................................... 6 A 1-14
Cylinder B o re s .........................................................................................................................................................................6A 1-14
Piston and Connecting Rod A ssem blies......................................................................................................................... 6 A 1-15
Piston Selection.......................................................................................................................................................................6A 1-15
Intake and Exhaust Manifold................................................................................................................................................6A 1-15
Cam shaft.................................................................................................................................................................................... 6A1 -1 6
Camshaft Bearings.................................................................................................................................................................. 6A 1 -1 7
Front Cover................................................................................................................................................................................6A 1 -1 7
Water P u m p ............................................................................................................................................................................. 6A 1 -1 8
Oil Pan and Rocker Arm Covers............................................................................................. ...........................................6A 1-18
Oil P u m p .................................................................................................................................................................................... 6A 1 -1 8
Valve Train Com ponents...................................................................................................................................................... 6 A 1-19
Cylinder H ead........................................................................................................................................................................... 6 A 1-19
Thermostat and Housing...................................................................................................................................................... 6A1-21
Crankshaft and Bearings...................................................................................................................................................... 6A1-21
Assembly of E n g in e ..................................................................................................................................................................6A 1-22
Prior to A s s e m b ly ..................................................................................................................................................................6A 1-22
Crankshaft and Main Bearing In stallatio n .......................................................................................................................6 A 1-22
Crankshaft Rear Oil Seal and Retainer In s ta lla tio n .................................................................................................... 6 A 1-23
Main Bearing Installation (Without Removing the C ran kshaft)................................................................................6 A 1-24
Camshaft Installation............................................................................................................................................................. 6 A 1-24
Front Cover Installation.........................................................................................................................................................6 A 1-24
Crankshaft Pulley Hub Installation.................................................................................................................................... 6A 1-25
Piston and Connecting Rod In s ta lla tio n .........................................................................................................................6 A 1-25
Oil Pump Installation............................................................................................................................................................. 6A 1-26
V -
SECTION 6A1
2.5 LITER L4 ENGINE
CONTENTS
6A1-1
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