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305-350 ENGINE
6A6-7
Fig.
6A6-6
Compressing Valve Spring (Typical)
Removal
1. Remove intake manifold as previously outlined.
2. Remove valve mechanism as previously outlined.
3. Remove valve lifters.
NOTE: Place valve lifters in a rack so that they may be
reinstalled in the same location.
Installation
1. Install valve lifters.
NOTE: Whenever new valve lifters are being installed,
coat foot of valve lifters with "Molykote"
or its
equivalent.
2. Install intake manifold as previously outlined.
3. Install and adjust valve mechanism as outlined.
V A L V E LIFTERS
Disassembly
1. Hold the plunger down with a push rod, and using
the blade of a small screwdriver, remove the push rod seat
retainer.
2. Remove the push rod seat and metering valve (Fig.
6A6-7).
3. Remove the plunger, ball check valve assembly and
the plunger spring.
4. Remove the ball check valve and spring by prying the
ball retainer loose from the plunger with the blade of a small
screwdriver (Fig. 6A6-8).
Cleaning and Inspection
Thoroughly clean all parts in cleaning solvent, and
inspect them carefully. If any parts are damaged or worn, the
entire lifter assembly should be replaced. If the lifter body
I
Lifter Body
6. Push Rod Seat
2
Push Rod Seat
Rete~ner
3.
Metering Valve
7 . Plunger
4 . Check Ball
8.
Check Bell Spring
5 . Check Ball Retamer
9. Plunger Spring
Fig.
6A6-7
Hydraulic Valve Lifter
wall is scuffed or worn, inspect the cylinder block lifter bore.
If the bottom of the lifter is scuffed or worn, inspect the
camshaft lobe. If the push rod seat is scuffed or worn, inspect
the push rod. An additive containing E P lube, such as EOS,
should always be added to crankcase oil for run-in when any
new camshaft o r lifters are installed. All damaged or worn
lifters should be replaced.
Fig.
6A6-8
Removing Ball Check Valve Retainer
Assembly
1. Place the check ball on small hole in bottom of the
plunger.
2. Insert check ball spring on seat in ball retainer and
place retainer over ball so that spring rests on the ball.
Carefully press the retainer into position in plunger with the
blade of a small screwdriver (Fig. 6A6-9).
3. Place the plunger spring over the ball retainer and
slide the lifter body over the spring and plunger, being careful
to line up the oil feed holes in the lifter body and plunger.
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