Cylinder Head Installation; Valve Train Component Installation - GMC T Series 1994 Repair Manual

CYLINDER HEAD INSTALLATION

Clean
Gasket surfaces on the block and cylinder head.
+4-
Install or Connect (Figure 49)
1. Head gasket.
• Do not use sealer on composition gaskets.
• Place the gasket over the block dowel pins.
2. Cylinder head. Carefully guide the cylinder head
into place over the dowel pins and gasket.
NOTICE: Refer to "Notice" on page 6A3-1.
0
0
0
)
1 3
4 i FRONT
Figure 49— Cylinder Head Bolt Tightening
Sequence
19. BOLT
20. GUIDE ASSEMBLY
21. NUT
22. BALL
23. ARMS, ROCKER
24. PUSHROD
26. LIFTER, HYDRAULIC
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©
0
B7874
3. Cylinder head bolts. Coat threads of the cylinder
head bolts with sealing com pound (GM P/N
1052080 or equivalent) and install finger-tight.
Tighten
$
Cylinder head bolts in three steps, using the
sequence shown in figure 49.
A. The first sequence to 34 N-m (25 ft.lbs).
B. The second sequence to 61 N-m (45 ft.lbs).
C. Final torque sequence to 90 N-m (65 lbs.
ft.).
VALVE TRAIN COMPONENT
INSTALLATION
Important
Replace all hydraulic lifters, change the engine oil
and filter and add GM Engine Oil Supplement (GM
P/N 1052367 or equivalent) to the engine oil when­
ever a new camshaft is installed.
Install or Connect (Figures 50 and 51)
1. Hydraulic lifters to the block. Lubricate the lifter
roller and body with high viscosity oil with zinc (GM
P/N 12345501 or equivalent).
2. Retainer with bolts.
Tighten
Retainer bolts to 16 N-m (145 lbs. in.).
3706r4876