General Engine Mechanical - GMC 1989 Light Duty Truck Repair Manual

S U B J E C T
General Engine M e c h a n ic a l.........................................................................................................................................................6A- 1
2.5 Liter L 4 .....................................................................................................................................................................................6A1- 1
2.8 Liter V 6 .....................................................................................................................................................................................6A2- 1
4.3 Liter V 6 .....................................................................................................................................................................................6A3- 1
4.8 Liter L 6 .....................................................................................................................................................................................6A4- 1
V8 E n g in e ....................................................................................................................................................................................... 6A5- 1
6.2 Liter D ie s e l.............................................................................................................................................................................. 6A7- 1
Model IMEF Carburetor................................................................................................................................................................ 6C1- 1
Model M4MEF Carburetor............................................................................................................................................................6C2- 1
TBI Unit Model 200 ....................................................................................................................................................................... 6C3- 1
TBI Unit Model 700 ....................................................................................................................................................................... 6C4- 1
SI Series Generators.....................................................................................................................................................................6D1- 1
CS-144 G enerators....................................................................................................................................................................... 6D2- 1
5MT, 10MT and 27MT Starting M otors................................................
Distributors.....................................................................................................................................................................................6D4- 1

GENERAL ENGINE MECHANICAL

S U B J E C T
General In fo rm a tio n ................................................................................................................................................................... 6 A - 1
S tatem ent on Cleanliness and C a r e ............................................................................................................................... 6 A - 1
Use of RTV Sealer and A naerobic Gasket E lim in a to r..............................................................................................6 A - 2
Replacing Engine G a s k e ts .................................................................................................................................................. 6 A - 2
Cylinder Bores, Pistons, Rings, and Connecting R o d s ..............................................................................................6 A - 2
M easuring C ylinder Bore T ap er and O ut-of-R ound (All M o d e ls )........................................................................ 6 A - 2
Cylinder Bore R econditioning (2.5 L E n g in e s ) ..........................................................................................................6 A - 3
Cylinder Bore R econditioning (2.8 L E n g in e s ) ..........................................................................................................6 A - 4
Cylinder Bore R econditioning (All Except 2.5 L and 2.8 L E n g in es)................................................................. 6 A - 4
B o r in g .........................................................................................................................................................................................6 A - 4
H o n in g ........................................................................................................................................................................................ 6 A - 5
Piston and Connecting Rod A s s e m b lie s ......................................................................................................................6 A - 5
Piston Selection (2.5 L and 2.8 L E n g in e s ).................................................................................................................6 A - 8
Piston Selection (All Except 2.5 L and 2.8 L E n g in e s )........................................................................................... 6 A - 8
C am shaft B earings..................................................................................................................................................................... 6 A -1 2
C am shaft Bearing Replacem ent (2.5 L and 6.2 L E n g in e s )..................................................................................6 A -1 2
C am shaft Bearing Replacem ent (All Except 2.5 L and 6.2 L E n g in e s )............................................................ 6 A -1 2
Hydraulic L ifte rs .......................................................................................................................................................................... 6 A -1 3
Inspection Before D isassem bly.........................................................................................................................................6 A -1 3
Hydraulic Lifter O v erh a u l.....................................................................................................................................................6 A -1 3
Valve Lifter Leak-Down Rate Test (Flat Type Lifters O n ly ) ..................................................................................6 A -1 5
C ylinder H e a d ...............................................................................................................................................................................6 A -1 6
D is a s s e m b ly ............................................................................................................................................................................ 6 A -1 6
Cleaning and In s p e c tio n .....................................................................................................................................................6 A -1 6
R e p a ir ........................................................................................................................................................................................ 6 A -1 7
A ss em b ly ................................................................................................................................................................................... 6 A -1 8
Measuring Main Bearing C le a ra n c e ....................................................................................................................................6 A -1 9
M easuring Connecting Rod Bearing C le a r a n c e ............................................................................................................6 A -2 0
Special T o o ls ...............................................................................................................................................................................6 A -2 2
SECTION 6
ENGINE
CONTENTS
................................................................................ 6D3- 1
SECTION 6A
CONTENTS
A
6 -1
P A G E
P A G E