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4.3 LITER V-6 6A3-21
Locate the piston ring end gaps as shown in
figure 33. Lubricate the piston and rings with
engine oil.
W ithout disturbing the ring end gap location,
install J 8037 over the piston (figure 34).
The piston must be installed so that the notch
in the piston faces the front of the engine
(figure 33).
Place the piston in its matching bore. The
connecting rod bearing tang slots must be on
the side opposite the camshaft. Using light
blows with a hammer handle, tap the piston
down into its bore (figure 34). At the same
tim e, from beneath the vehicle guide the
connecting rod to the crankpin with J 5239
(figure 35). Hold the ring compressor against
the block until all rings have entered the
cylinder bore.
Remove J 5239 from the connecting rod bolts.
Im p o rtan t
• Each connecting rod and bearing cap should
be m arked, beg in nin g at the front of the
engine. Cylinders 1, 3 and 5 are at the left
bank and 2, 4 and
6
are the right bank. The
numbers on the connecting rod and bearing
cap must be on the same side when installed
in the cylinder bore. If a connecting rod is ever
transposed from one block or cylin d e r to
another, new connecting rod bearings should
be fitted and the connecting rod should be
numbered to correspond with the new cylinder
number.
3. Connecting rod cap with bearing insert.
M easure
Connecting rod bearing clearance. Refer to
GENERAL ENGINE MECHANICAL (SEC.
6
A).
m
+ 4-
Q
Tighten
• Connecting rod cap nuts to 60 N m (45 ft. lbs.).
M easure
Connecting rod side clearance (figure 36). The
proper clearance is 0.006 to 0.014-inch.
OIL PUMP INSTALLATION
Install or C onnect
1. Oil pump to the engine.
• Align the slot in the oil pump shaft with the
tang on the distributor shaft.
• The oil pump should slide easily into place.
• No gasket is used.
2
. Oil pump to main bearing cap bolt.
Tighten
Oil pump to main bearing cap bolt to 90 N m
(65 ft. lbs.).
OIL PAN INSTALLATION
+ 4 -
Install or C o nnect (Figure
37)
Apply PST sealant (GM part number 1052080 or
equivalent) to the front cover to block joint and to the
rear crankshaft retainer seal to block joint. Apply the
sealant about 25 mm (1-inch) in both directions from
each of the four corners (figure 37).
Oil pan gasket to the oil pan.
Oil pan to the engine.
Oil pan reinforcements, bolts and nuts.
Tighten
Bolts to 11.3 N-m (100 in. lbs.)
Nuts to 22.6 N-m (200 in. lbs.)
CYLINDER HEAD INSTALLATION
1
.
Clean
•
Gasket surfaces on the block and cylinder head.
|~n~|
Install or C o nnect (Figure
38)
Head gasket.
• If a steel gasket is used, coat both sides of the
gasket with sealer. Spread the sealer thin and
even.
• Do
n ot
use
s e a le r
on
c o m p o s itio n
steel-asbestos gaskets.
• Place the gasket over the block dowel pins
with the head up.
Cylinder head. Carefully guide the cylinder head
into place over the dowel pins and gasket.
Cylinder head bolts. Coat threads of the cylinder
head bolts with sealing compound (GM part num ber
1052080 or equivalent) and install finger-tight.
Tighten
C ylinder head bolts, a little at a time, using the
sequence shown in figure 38. The proper
torque is 90 N m (65 ft. lbs.).
2
.
3.
&
Summary of Contents for 1989 Light Duty Truck
Page 1: ...vr V Light Duty Truck Unit Repair Manual...
Page 2: ......
Page 11: ...GENERAL INFORMATION OA 5 Figure 8 RV Models...
Page 13: ...GENERAL INFORMATION OA 7 Figure 11 ST Models...
Page 18: ......
Page 44: ......
Page 76: ...1B3 18 R 4 AIR CONDITIONING COMPRESSOR N...
Page 114: ......
Page 162: ......
Page 176: ...4B3 14 91 2 INCH RING GEAR...
Page 192: ...4B5 4 DANA REAR AXLES Figure 4 Spreading the Differential Case Figure 7 Removing the Ring Gear...
Page 218: ......
Page 220: ...4B6 2 12 INCH RING GEAR ROCKWELL F 04734 Figure 1 Rear Axle Components...
Page 229: ...12 INCH RING GEAR ROCKWELL 4B6 11 SPECIAL TOOLS Special Tools...
Page 230: ...4B6 12 12 INCH RING...
Page 240: ...4B7 10 LOCKING DIFFERENTIALS SPECIAL TOOLS Special Tools...
Page 260: ...4C2 6 93 4 INCH RING GEAR FRONT AXLE Figure 16 Removing the Pinion Inner Bearing...
Page 273: ...T TRUCK FRONT AXLE 4C3 3 F 05785 Figure 1 Axle Components...
Page 291: ...K TRUCK FRONT AXLE 4C4 3 Figure 1 Front Axle Com ponents K 15 25 Models...
Page 293: ...K TRUCK FRONT AXLE 4C4 5 Figure 3 Front Axle Com ponents K35 Models...
Page 318: ...C4 30 K TRUCK FBOHT AXLE...
Page 334: ......
Page 361: ...2 5 LITER L4 ENGINE 6A1 5 Figure 3 Cylinder Head Manifolds and Components...
Page 363: ...2 5 LITER L4 ENGINE 6A1 7 F 05715 Figure 5 Block and Components...
Page 395: ...2 8 LITER V 6 6A2 3 Figure 1 Engine Lubrication Diagram...
Page 396: ...6A2 4 2 8 LITER V 6 Figure 2 Engine Lubrication Diagram...
Page 424: ...6A2 32 2 8 LITER V 6...
Page 427: ...I 4 3 LITER V 6 6A3 3 Figure 1 Engine Lubrication Diagram B 07857...
Page 451: ...4 3 LITER V 6 6A3 27 SPECIFICATIONS ENGINE SPECIFICATIONS F 6344...
Page 457: ...4 8 LITER L6 6A4 3 Figure 2 Lubrication Diagram Front View...
Page 460: ...6A4 6 4 8 LITER L6 C 1 107 112 fK 108 3 109 165 129 B 05056 Figure 5 Block and Components...
Page 490: ...Ml...
Page 493: ...V8 ENGINE 6A5 3 Figure 1 Lubrication Diagram 5 0L and 5 7L Engines...
Page 494: ...6A5 4 V8 ENGINE Figure 2 Lubrication Diagram 5 0L and 5 7L Engines...
Page 530: ...6A5 40 V8 ENGINE Figure 81 Exhaust Manifold 7 4L Engines Figure 82 Water Pumps and Components...
Page 571: ...6 2 LITER DIESEL 6A7 35 Figure 58 Vacuum Pump Installed...
Page 576: ......
Page 582: ...6C1 6 MODEL 1MEF CARBURETOR Figure 9 Monojet Model 1MEF...
Page 604: ...6C2 6 MODEL M4MEF CARBURETOR Figure 9 Model M4MEF...
Page 640: ...6C4 8 MODEL 700 THROTTLE BODY...
Page 652: ...nmm...
Page 672: ......
Page 693: ...DISTRIBUTORS 6D5 13 Figure 27 Testing the Pickup Coil Figure 28 Testing the Ignition Coil...
Page 696: ......
Page 698: ...7A1 2 700 R4 AUTOMATIC TRANSMISSION Figure 1 Case and External Parts J H 0 0 5 3 7 0 0 R 4 R 2...
Page 745: ...700 R4 AUTOMATIC TRANSMISSION 7A1 49...
Page 762: ...7A2 2 400 475 AUTOMATIC TRANSMISSION Figure 1 Case and External Parts H H 0021 400 R 3...
Page 773: ...400 475 AUTOMATIC TRANSMISSION 7A2 13 Figure 29 Internal Parts H H 0 0 4 3 4 0 0 R 2...
Page 797: ...400 475 AUTOMATIC TRANSMISSION 7A2 37 Figure 93 Control Valve Assem bly...
Page 803: ...400 475 AUTOMATIC TRANSMISSION 7A2 43 Figure 104 Bushing Replacement Procedure...
Page 808: ...J c I i sal...
Page 838: ......
Page 840: ......
Page 842: ......
Page 850: ...7B1 12 HM 290 MANUAL TRANSMISSION J i t i a x V L...
Page 856: ...7B1 18 HM 290 MANUAL TRANSMISSION...
Page 892: ...7B1 54 HM 290 MANUAL TRANSMISSION Figure 93 Special Tools...
Page 897: ...HM 117 TRANSMISSION 7B2 5...
Page 901: ...HM 117 TRANSMISSION 7B2 9 B 05180 Figure 17 Installing the 1st and 2nd Synchronizer...
Page 912: ...20 HM...
Page 924: ...7B3 12 NEW PROCESS TRANSMISSION SPECIAL TOOLS...
Page 927: ...BORG WARNER TRANSMISSIONS 7B4 3 Figure 2 77 mm Transmission and Components...
Page 940: ...i ii iii m i in m i...
Page 944: ...7D1 4 TRANSFER CASE FO 5688 Figure 3 NP205 Transfer Case...
Page 952: ...7D1 12 TRANSFER CASE...
Page 963: ...NEW PROCESS 241 TRANSFER CASE 7D2 11 Figure 17 Oil Pump Pickup Screen Doweled Case Holes...
Page 964: ...7D2 12 NEW PROCESS 241 TRANSFER CASE Figure 18 NP 241 Transfer Case Cut Away...
Page 978: ......
Page 981: ...BORG WARNER 1370 TRANSFER CASE 7D4 3 J...
Page 992: ...7D4 14 BORG WARNER 1370 TRANSFER CASE Figure 26 Installing the Rear Output Yoke...
Page 993: ...BORG WARNER 1370 TRANSFER CASE 7D4 15 Figure 27 BW 1370 Transfer Case...
Page 997: ......
Page 998: ...X 8937...