![background image](http://html1.mh-extra.com/html/gmc/s-series-1994/s-series-1994_repair-manual_2235929400.webp)
M(§)
0 (D
<S)m
4 FR T
(§ )(§ )
INITIAL TIGHTENING SEQUENCE
FINAL TIGHTENING SEQUENCE
A. Bolt 56 N-m (41 ft.lbs)
All Other Bolts 47 N-m (35 ft.lbs)
B7873
Figure 52— Intake Manifold Bolt Tightening
Sequence
3. Pushrods.
• Seat the pushrods into the socket of the
hydraulic lifters.
Important
•W h e n new ro c k e r arm s a n d /o r b a lls are
installed, coat their bearing surfaces with high
viscosity oil with zinc (GM P/N 12345501 or
equivalent).
4. Rocker arms (44) with balls (43) on to the proper
stud.
5. Rocker arm nuts (42) on to the studs.
• Align the push rod into the rocker arm while
tightening rocker arm nut (42).
Adjust
• Valves. Refer to “Valve Adjustment.”
VALVE A D JU STM EN T
The 4.3L VIN Z engine can be equipped with two
different rocker arm stud configurations that require dif
ferent valve lash procedures.
If you have a 4.3L VIN Z engine that has screw-in
rocker arm studs with positive stop shoulders, no valve
adjustment is necessary. When the valve train requires
service, you simply tighten the rocker arm nuts to 27
N-m (20 ft. lbs).
If you have a 4.3L VIN Z engine that has pressed-in
rocker arm studs, you must follow the valve adjustment
procedure outlined below.
1. Rotate the engine until the mark on the torsional
damper lines up with the “ 0” mark on the timing
tab and the engine in the number one firing posi
tion. This may be determined by placing fingers on
the number one valve as the mark on the damper
comes near the “ 0” mark on the timing tab. If the
rocker arms are not moving, the engine is in the
number one firing position. If the rocker arms move
as the mark comes up to the timing tab, the engine
is in the number four firing position and should be
turned over one more time to reach the number
one position.
2. With the engine in the number one firing position
as determined above, the following valves may be
adjusted:
• Exhaust valves 1 , 5 , 6 .
• Intake valves 1, 2, 3.
(Even numbered cylinders are the left bank; odd
numbered cylinders are the right bank, when
viewed from the front of the engine).
3. Back out the adjusting nut until lash is felt at the
pushrod, then turn in the adjusting nut until all lash
is removed. This can be determined by rotating the
pushrod while turning the adjusting nut. When the
play has been removed, turn the adjusting nut in 1
3/4 additional turn (to properly locate the lifter
plunger).
4. Crank the engine one revolution until the timing tab
“0” mark and torsional damper mark are again in
alignment. This is the number four firing position.
The following valves may be adjusted:
— Exhaust valves 2, 3, 4.
— Intake valves 4, 5, 6.
INTAKE MANIFOLD
INSTALLATION
Install or Connect (Figures 51 and 52)
1. Gaskets to the cylinder head with the port blocking
plates facing the rear of the engine.
2. RTV to the front and rear sealing surfaces on the
block. Apply a 5-mm (3/16-inch) bead of RTV (GM
P/N 1052366 or equivalent) to the front and rear of
the block as shown in figure 51. Extend the bead
13 mm (1/2 inch) up each cylinder head to seal
and retain the gaskets.
3. Intake manifold to the engine.
NOTICE: Refer to “Notice” on page 6A3-1.
4. Intake manifold bolts.
Tighten
Intake m anifold bolts to 47 N-m (35 lbs. ft.)
using the tightening sequence shown in figure
52.
Retorque, intake manifold bolts using the tight
ening sequence shown in figure 52.
Bolt 9 (A in figure 52) to 56 N-m (41 lbs. ft.)
Summary of Contents for S Series 1994
Page 1: ......
Page 11: ...VIEW A p n n n j VIEW C F7554 Figure 10 Hydra Matic 4L60 E Transmission I D Location...
Page 24: ...NOTES...
Page 26: ......
Page 69: ...NOTES...
Page 71: ...3 2 STEERING...
Page 73: ......
Page 84: ......
Page 102: ...40...
Page 130: ...NOTES...
Page 146: ...NOTES...
Page 162: ...NOTES...
Page 166: ...Figure 5 Removing the Pinion Flange Figure 6 Pressing the Drive Pinion from the Cage...
Page 178: ...Figure 3 Spreading the Differential Case Figure 4 Removing the Differential...
Page 190: ...NOTES...
Page 202: ...NOTES...
Page 206: ...F5785...
Page 212: ...B Button Moved Out of Bearing Bore F5791...
Page 228: ...NOTES...
Page 232: ......
Page 234: ......
Page 236: ...Adjuster 63 Bolt 64 Lock Figure 10 Turning the Adjuster Plug K3 Models...
Page 237: ...Figure 13 Removing the Pinion Seal 39 Bearing Cup Figure 16 Removing the Inner Bearing Cap...
Page 261: ...F7475...
Page 267: ...B Button Moved Out of Bearing Bore F5791...
Page 294: ...NOTES...
Page 300: ...NOTES...
Page 318: ...NOTES...
Page 322: ...SR207LN2 EDS...
Page 324: ......
Page 326: ...OVERHEAD OILING AND RETURN MAIN OIL GALLERY N30005 6A2 J EDS...
Page 368: ...103 153 127 V1200...
Page 370: ......
Page 372: ......
Page 374: ...F9375 Figure 7 Engine Lubrication Diagram Engines Without Balance Shaft...
Page 376: ...Figure 9 Engine Lubrication Diagram Engines With Balance Shaft...
Page 399: ...V2974...
Page 410: ......
Page 412: ...195 196 201 174 252 163 165 164 244 3706r3924...
Page 452: ......
Page 454: ...163 164 V1202...
Page 456: ...20 21x 302 210 4 0 41 2 5 2 5 1 2 51 4 2 e3 54 3 9 252 252 S 255 255 25 6 256 209 V1196...
Page 458: ...100 1 8 4 185 183 177 v 75 201 3706r1204...
Page 460: ......
Page 510: ......
Page 512: ...V2131...
Page 514: ...110 106 106 103 90 93 89 88 87 86 v 7 7 7 7 j A _ 111 f t 2 a a s 53 49 L 47 46 3706r4751...
Page 516: ...259 260 150 237 S lM 180 167180 J 1 82 183 170 169 1 1 78 1 7 9 213212 2 0 7 205 r i 3706r4752...
Page 566: ...NOTES...
Page 574: ...NOTES...
Page 618: ...SPECIAL TOOLS...
Page 620: ...NOTES...
Page 672: ......
Page 682: ......
Page 686: ......
Page 694: ...RH0213 4L60 E...
Page 695: ...657 659 m i J 8092 H J 34196 4 3 34196 5 657 658 665 J 23907 J 7004 1 J 8092 RH0214 4L60 E...
Page 696: ...J 8092 J 34196 4 33 31 J 8092 RH0215 4L60 E...
Page 697: ...SPECIAL TOOLS...
Page 698: ...SPECIAL TOOLS...
Page 758: ...RH0194 4L80 E...
Page 764: ......
Page 770: ...SPECIAL TOOLS...
Page 771: ...SPECIAL TOOLS CONT...
Page 772: ......
Page 775: ......
Page 776: ......
Page 785: ......
Page 804: ...NOTES...
Page 806: ......
Page 808: ......
Page 822: ...3707r5079...
Page 840: ......
Page 848: ...NOTES...
Page 852: ......
Page 860: ...F5435...
Page 866: ......
Page 878: ...F9167...
Page 882: ...16 FrontOutputShaft 18 DrivtQNr 19 DrivenGm t 20 DriveChain 22 FrontOutputBearing V2836...
Page 890: ...F9168...
Page 908: ......
Page 919: ......