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PISTON NOISE
VALVE ACTUATING
COMPONENT NOISE
Possible
i sto
bro ken .
P
n
Loose or seized piston
i
l
s
de
c
ea r an
Carbon
on
excessive.
( I)
Insufficient oil
(2)
Push rods worn or bent.
Rocker arms or
or
Excessive tappet leak-down.
face worn.
Broken or cocked valve
(8)
clearance excessive.
Valve bem.
L oo
k e
.
s
e ro
c
r
a
rm
s
Valve seat runout excessive.
(Il)
o
c
e
necessary.
is
Remove carbon from
( I)
Check for:
Low oil level.
(2 )
.
wo
rn
in
(7)
( II)
c learance,
side c learance.
as
worn or bent
rods.
worn rocker arms or
valve tappet.
for wear.
clearance.
valve.
t
q u e
.
or
bolts with
valve seat/valves.
80651E
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Table of Contents
Troubleshooting
