454 CID (7.4L) / 502 CID (8.2L)
SERVICE MANUAL NUMBER 23
Page 3A-35
90-861326--1 MARCH 1999
Removal
IMPORTANT: Keep push rod and hydraulic valve lifter from each valve together as a
matched set and mark them so they can be reinstalled in the same location later.
Remove as outlined:
1. Remove rocker arm covers.
2. Remove intake manifold.
3. Remove rocker arm assemblies and push rods.
4. Remove valve lifters.
72329
b
a
a -
Lifter Restrictor Retainer
b -
Fasteners
72340
a
b
a -
Lifter Restrictor
b -
Roller Lifter
5. Remove lifter restrictors on roller lifters models.
6. Remove valve lifters.
Installation
IMPORTANT: It is recommended that the engine oil be changed and a new oil filter be
installed whenever servicing valve lifters or camshaft.
IMPORTANT: Before installing lifters, coat the bottom of the lifter with engine oil. If
new lifters or a new camshaft have been installed, an additive containing EP lube
(such as General Motors Cam and Lifter Pre-lube or equivalent) should be poured
over camshaft lobes before installing lifters.
IMPORTANT: Before installation, coat entire valve lifter with engine oil.
IMPORTANT: DO NOT install used valve lifters if a new camshaft has been installed.
1. Install hydraulic valve lifters and components.
2. Install intake manifold.
3. Install push rods and rocker arms. Torque rocker arm bolts to specification.
4. Install rocker arm cover.
5. Start engine and check for leaks.
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