Valve Lifter-Recondition; Valve Lifter - Clean And Inspect; Valve Lifter - Pontiac Grand Prix Service Manual

6-48 1969 PONTIAC SERVICE MANUAL
REPLACE
NOTE:
If
new lifer is to be installed, be sure to remove
all sealer coating ji-om inside of new lifter and check
leak-down rate.
1. Place new lifter in lifter boss.
2. Replace push rod exactly as removed (same end
against rocker arm).
3. Position rocker arm on push rod and tighten rocker
a r m
ball retaining nut to 20 lb. ft. torque.
4. Replace rocker arm cover.
5. Inspect condition of push rod cover gasket and
replace if necessary; replace push rod cover and
tighten screws. New gasket must be cemented securely
to push rod cover before installation.
6. Replace intake manifold using new gaskets and
replace O-ring seal.
VALVE LIFTER-RECONDITION
NOTE: Because of the important part hydraulic valve
lifters play in the operation of an engine and the close
tolerances to which they are manufactured, proper
handling, and above all, cleaniness, cannot be
overstressed when servicing these parts.
New lifters are serviced as individual units packaged
with a plastic coating. Leave the coating on until ready
to check leak-down rate. It is not necessary to remove
the oil from new lifters prior to checking leak-down
rate since special leak-down oil is already in new
lifters.
Wash tank and tray J 5821 (Fig. 6-82) is recommended
for cleaning valve lifters. This tank should be used
only for valve lifters and should 'be kept covered when
not in use.
A l l
servicing should be done in an area
removed from grinders or other sources of dust and
foreign material.
Lifters should at all times be stored in a covered box
which will aid in keeping them clean. The lifter box
should be kept dry and as free of oil as possible.
VALVE LIFTER
-
DISASSEMBLE
1. Remove push rod seat retainer ring by holding seat
down with push rod while dislodging spring from lifter
body with a pointed tool (Fig. 6-83).
2. Invert lifter and allow push rod seat and plunger to
slide out of body. If plunger sticks in body, place lifter
in large end of hydraulic valve lifter plunger remover J
4160-A, with push rod end of lifter downward. Hold
tool f m l y in hand with thumb over lifter body and
sharply strike the tool against a block of wood (Fig. 6
84) until plunger falls out.
NOTE: It may be necessary to soak a lifer having a
stuck plunger in cleaning solvent for several minutes in
order to remove the plunger.
3. Drain oil out of lifter body and place all valve lifter
parts in separate compartment of tray from wash tank
J 5821 (Fig. 6-82).
CA UTION: Valve lljler body and plunger are selectively
fitted and must not be interchanged with parts of other
lifters. (Keeping all parts of lijlers together will also aid
in trouble diagnosis.)
VALVE LIFTER - CLEAN AND INSPECT
Wash tank J 5821 is recommended for cleaning valve
lifter parts. This tank consists of two chambers, a tray
and a cover. One chamber is for cleaning solvent and
the other is for kerosene. Whenever the tank is not
being used (and when parts are soaking), the cover
should be closed.
1. Before placing tray of parts in cleaning solvent, first
immerse it in kerosene chamber to remove as much
engine oil as possible. (This reduces contamination of
solvent, thus prolonging its useful life.)
2. Submerge tray in cleaning solvent and allow to soak
for approximately one hour. More time may be
required depending on varnish condition and effective-
ness of solvent. Light agitation of tray in solvent at
10-15 minute intervals will hasten cleaning action.
Fig.
6-84
Removing Stuck Plunger