TROUBLESHOOTING
TESTING AND ADJUSTING
14. LITTLE MOVEMENT OF ROCKER ARM AND TOO MUCH VALVE CLEARANCE
Cause
Correction
Too Much Valve Clearance
Make adjustment, See the Subject VALVE CLEARANCE in Test-
ing and Adjusting.
Not Enough Lubrication
Check lubrication in valve compartment. There must be a strong flow
of oil at engine high rpm, but only a small flow at low rpm. Oil
passages must be clean, especially those sending oil to the cylinder
head.
Rocker Arm Worn at Face That
If there is too much wear, install new rocker arms. Make adjustment-
Makes Contact With Valve
of valve clearance, See the Subject VALVE CLEARANCE in Test-
ing and Adjusting.
End of Valve Stem Worn
If there is too much wear, install new valves. Make adjustment of
valve clearance, See the Subject VALVE CLEARANCE in Testing
and Adjusting.
Worn Push Rods
If there is too much wear, install new push rods. Make adjustment of
valve clearance, See the Subject VALVE CLEARANCE in Testing
and Adjusting.
Valve Lifters Worn
If there is too much wear, install new valve lifters. Make adjustment
of valve clearance, See the Subject VALVE CLEARANCE in Test-
ing and Adjusting.
Damage to Valve Lifters
Install new valve lifters. Check camshaft for wear. Check for free
movement of valves or bent valve stem. Clean engine thoroughly.
Make adjustment of valve clearance, See the Subject VALVE
CLEARANCE in Testing and Adjusting.
Worn Cams on Camshaft
Check valve clearance. Check for free movement of valves or bent
valve stems. Check for valve lifter wear. Install a new camshaft.
Make adjustment of valve clearance, See the Subject VALVE
CLEARANCE in Testing and Adjusting.
15. VALVE ROTOCOIL OR SPRING LOCK IS FREE
Cause
Correction
Damage to Locks
Locks with damage can cause the valve to fall into the cylinder. This
will cause much damage.
Damage to Valve Spring(s)
Install new valve spring(s).
16. OIL AT THE EXHAUST
Cause
Correction
Too Much Oil in the Valve Compart-
Look at both ends of the rocker arm shaft. Be sure that there is a plug
ment
in each end.
Worn valve Guides
Reconditioning of the cylinder head is needed.
Worn Piston Rings
Inspect and install new parts as needed.
Running Engine Too Long At Low
Don’t let the engine run for long periods of time at low idle.
Idle
