Rocker Arm Stud Replacement - GMC G Service Manual

35
31. Bolt
32. Clamp
33. Nut
34. Exhaust Manifold
35. Bolt
Figure 11 — Manifolds And Components
H Install or Connect (Figures 10 and 11)
1. New gasket over the manifold studs on the cylinder
head.
2. Manifold assembly.
3. Clamps (32).
4. Bolts (31) and nuts (33).
] Important
• Always tighten the manifold to cylinder head
bolts and nuts (31 and 33) BEFORE tightening
the manifold center bolt and nuts (35 and 40).
Tighten
• Bolts (31) and nuts (33) to 52 N»m (38 ft. lbs.).
• Bolts (35) and nuts (40) to 60 N«m (44 ft. lbs.).
5. Manifold heat stove.
6. Exhaust pipe.
7. PCV hose.
8. AIR pump and bracket.
9. Fuel and vacuum lines from the manifold, EGR valve
(if equipped) and EFE valve (if equipped).
10. Carburetor (if removed).
11. Throttle controls at the bell crank.
12. Air cleaner.
13. Negative battery cable.
36. Washer
37. Stud
38. Gasket
39. Intake Manifold
40. Nut
B-07866
4.8 LITER L6 6A7-9
\<fi\ Adjust
• Engine idle speed, if necessary. Refer to CARBURE­
TORS (SEC. 6C1) and the vehicle's Emission Control
Information label.
ROCKER ARM STUD
REPLACEMENT
M Remove or Disconnect (Figure 12)
Tool Required:
J 5802-01 Rocker Arm Stud Remover
1. Rocker arm cover and rocker arm. Refer to "Rocker
Arm Cover Replacement" and "Rocker Arm and
Pushrod Replacement" in this section.
2. Rocker arm stud.
• Place J 5802-01 over the rocker arm stud.
• Install a nut and flat washer.
• Turn the nut to remove the stud (figure 12).
E Install or Connect (Figures 13 and 14)
Tools Required:
J 5715 Reamer (0.003-inch oversize) or
J 6036 Reamer (0.013-inch oversize)
J 6880 Rocker Arm Stud Installer
NOTICE: Do not attempt to install an oversize
rocker arm stud without reaming the stud hole
as this could damage the cylinder head.
• Ream the hole to the proper size for the replacement
oversize rocker arm stud. Use J 5715 for 0.003-inch
oversize studs, or J 6036 for 0.013-inch oversize
studs (figure 13).
• Coat lower end (press-fit area) of the rocker arm stud
with hypoid axle lubricant.
1. Rocker arm stud using J 6880 (figure 14). Stud is
installed to proper depth when J 6880 bottoms on the
cylinder head.