EM-64
ENGINE MECHANICAL - Cylinder Head
6. INSPECT CYLINDER HEAD FOR FLATNESS
Using a precision straight edge and thickness gauge,
measure the surfaces contacting the cylinder block mani-
folds for warpage.
Maximum warpage: 0.20 mm (0.0079 in.)
If warpage is greater than maximum, replace the cylinder
head.
7. INSPECT CYLINDER HEAD FOR CRACKS
Using a dye penetrant, check the combustion chamber,
intake and exhaust ports, head surface and the top of the
head for cracks.
If cracked, replace the cylinder head.
8. CLEAN VALVES
(a) Using a gasket scraper, chip any carbon from the valve
head.
(b) Using a wire brush, thoroughly clean the valve.
9. INSPECT VALVE STEMS AND GUIDE BUSHINGS
(a) Using a caliper gauge, measure the inside diameter of
the guide bushing.
Bushing inside diameter:
8.010-8.030 mm (0.3154-0.3161 in.)
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