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3 5 0 AND 4 0 3 ENGINE
6A4-9
.
LBS.
FT. LBS.
HOT AIR SHROUD
/
EXHAUST MAN I FOLD B ~ L T S
TORQUE TO 25 FT. LBS.
BOLT LOCK
THEN BEND LOCK TABS
AROUND BOLT HEADS
4792
Fig. 6A4-12 Removing Hot Air Shrouds
FULLY DRIVEN. SEATED
AND NOT STRIPPED
O I L FILLER
\
Fig. 6A4-13 Valve Cover
3. Remove plunger and plunger spring. If plunger is
stuck tight, allow lifter to soak in carburetor cleaning solvent
for approximately five minutes, then remove. Available Tool
BT-6438 can be used to remove plunger.
4. Remove ball check retainer from plunger, then remove
ball and spring.
Cleaning and Inspection
After lifters are disassembled, all parts should be cleaned
in clean solvent. A small particle of foreign material under
the ball check valve will cause malfunctioning of the lifter.
Close inspection should be made for nicks, burrs or scoring
of parts. If either the body or plunger is defective, replace with
APPLY A Y1Z" BEAD OF R. T.V.
IROOM TEMRRATURE VULCANIZ INCl
SEALER ON THE VALVE COVER
AS SHOWN.-
I
3669
Fig. 6A4-14 Applying Sealer on Valve Cover
a new lifter assembly.
Whenever lifters are removed, check the lifter foot for
abnormal wear
as
follows:
1. Place a straight edge across the lifter foot.
NOTE: Lifter foot must be clean and dry.
2. While holding the lifter at eye level, check for light
between the straight edge and lifter foot.
3. If light indicates a concave surface of the lifter foot,
the lifter should be replaced and the camshaft inspected for
wear. Wear at the CENTER of the cam base circle is
NORMAL. The camshaft should be replaced ONLY when
wear is present across FULL WIDTH of cam base circle. Full
wear across the nose of the cam is normal.
4. Assemble ball check, spring and retainer into plunger.
(Fig. 6A4-20) Make sure retainer flange is pressed tight
against bottom of recess in plunger.
5. Install plunger spring over ball check retainer.
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