Valve Train Component Installation; Water Pump Installation - GMC 1990 Light Truck Repair Manual

31. Bolt
32. Rocker Arm Ball
33. Rocker Arm
45. Push Rod Guide
47. Push Rod
Figure 54—Valve Train Components
Figure 55—Applying Sealant to the Rocker
Arm Cover
2.5 LITER L4 ENGINE 6A1-29
A. Apply A C ontinuous (5 mm 3/ie-lnch)
Diameter Bead Of RTV As Shown
Figure 56—Applying RTV to the Pushrod Cover
VALVE TRAIN COMPONENT
+ + Install or Connect (Figures 3, 5, 54, 55 and 56)
• Lubricate the hydraulic lifters (121) with Engine Oil
S upplem ent (GM part num ber 1051396) or
equivalent.
1. Hydraulic lifters (121) into their mating bores in the
block.
2. Hydraulic lifter guides (122).
3. Retainers (123) and studs (60).
a
Tighten
• Studs (60) to 10.0 N m (90 in. lbs.).
4. Pushrod cover (50).
• Apply a 5mm (3 /i6-inch) bead of RTV sealant
to the pushrod cover as shown in figure 56.
5. Pushrod cover nuts.
6. Pushrods (47). Seat the pushrods into the sockets of
the hydraulic lifters.
• Coat the mating surfaces of the rocker arms (33)
F-01989
and balls (32) with a molybdenum disulfide grease.
7. Rocker arms (33).
8. Balls (32).
9. Bolts (31).
Tighten
• Bolts to 30 N m (22 ft. lbs.). DO NOT
OVERTIGHTEN.
• Apply a 5 mm (3/ie-inch) bead of RTV sealant to the
rocker arm cover, inboard of the bolt holes.
10. Rocker arm cover to the cylinder head. Install the
cover while the RTV is still wet (within 10 minutes).
11. Rocker arm cover bolts.
Tighten
• Bolts to 8.5 N m (75 in. lbs.)

WATER PUMP INSTALLATION

Install or Connect (Figure 57 and 58)
1. Gasket.
2. Water pump.
3. Bolts.
4. Water pump pulley.
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INSTALLATION
V
B-07963