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TROUBLE SHOOTING
Engine top-end problems usually affect engine performance. These problems can be diagnosed by a
compression test, or by tracing engine noise to the top end with a sounding rod or stethoscope.
LOW COMPRESSION
Valve
Incorrect valve adjustment
Worn or damaged valve seats
Burned or bent valve
Incorrect valve timing
Weak valve spring
Cylinder head
Leaking or damaged head gasket
Warped or cracked cylinder head
Faulty cylinder or piston
Excessive noise
Incorrect valve adjustment
Sticking valve or broken valve spring
Worn or damaged rocker arm or camshaft
Worn or damaged cam chain
Worn or damaged cam chain tensioner
Worn cam sprocket teeth
Excessive smoke
Damaged valve stem seal
Faulty cylinder or piston rings
CAMSHAFT COMPOSITION REMOVAL
Remove the rubber tube of gas waste recovery.
Remove the cylinder head cover.
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