Page text (OCR transcript)
EM-42 ENGINE MECHANICAL — Cylinder Head
3. CLEAN COMBUSTION CHAMBER
Using a wire brush, remove all the carbon from the combustion chambers.
NOTICE: Be careful not to scratch the head gasket contact surface.
4. CLEAN VALVE GUIDE BUSHINGS
Using a valve guide brush and solvent, clean all the valve guide bushings.
5. CLEAN CYLINDER HEAD
Using a soft brush and solvent, thoroughly clean the head.
6. INSPECT CYLINDER HEAD FOR FLATNESS
Using a precision straight edge and thickness gauge, measure the surface contacting the cylinder block and manifold for warpage.
Maximum warpage: 0.10 mm (0.0039 in.)
If warpage is greater than maximum, replace the cylinder head.
