Hydraulic Lifter Replacement - GMC G Service Manual

INITIAL TIGHTENING SEQUENCE
FINAL TIGHTENING SEQUENCE
A. Front Of Engine
Figure 9 — Intake Manifold Bolt Tightening
Sequence
HYDRAULIC LIFTER
REPLACEMENT
H Remove or Disconnect (Figure 10)
1. Rocker arm cover, intake manifold, and pushrods.
Refer to "Rocker Arm Cover Replacement", "Intake
Manifold Replacement" and "Rocker Arm and
Pushrod Replacement" in this section.
C. RTV Sealant
Figure 8 — Intake Manifold
2. Bolts (40).
3. Retainer (41) with restrictors (46).
4. Hydraulic lifters.
• Remove the hydraulic lifters one at a time and
Inspect
Hydraulic lifter body for scuffing or scoring. If the lifter
body wall is worn or damaged, the mating bore in the
block should also be checked.
Check the fit of each hydraulic lifter in its mating bore
in the block. If the clearance is excessive, try a new
lifter.
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Roller for freedom of movement.
Roller for flat spots, pits and missing or broken needle
bearings. If worn, pitted, or damaged, the mating
camshaft lobe should also be checked.
Hydraulic Lifter Repair
• Refer to the proper Unit Repair Manual.
4.3 LITER V6 6A3-9
place them in an organizer rack. The lifters must
be installed in the same bore from which they
were removed.
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