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10-25
• CYLINDER HEAD WARPAGE
1) Remove the carbon deposits from the combustion
chamber. Clean off any gasket material from the cylinder
head surface.
2) Check the spark plug holes and valve areas for cracks.
3) Check the cylinder head for warpage using a straight edge
and a feeler gauge.
Take care not to damage (scores, scratches, etc.) the
cylinder head at the mating surface with the gasket.
4) If the measurement exceeds the service limit, recondition.
Reconditioning must be made within the standard value of
the cylinder head height.
NOTICE
NOTICE
• CYLINDER HEAD HEIGHT
• 11 x 155 mm BOLT-WASHER (CYLINDER HEAD
BOLT) O.D.
1) Measure the bolt O.D. at two points as shown.
[1]
MEASUREMENT POINT
[3]
FEELER GAUGE
[2]
STRAIGHT EDGE
50 mm (2.0 in)
45 mm
(1.8 in)
SERVICE LIMIT
0.05 mm (0.002 in) Min.
SERVICE LIMIT
10.6 mm (0.42 in)
STANDARD
SERVICE LIMIT
103.95 – 104.05 mm
(4.093 – 4.096 in)
Cylinder head reconditioning procedure:
Apply Prussian Blue compound to the level block to identify the
warpage, and using a fine oil stone, grind the cylinder head in
the figure of “8” with the warped part being the center of the
ground part. Or use the lapping machine to recondition the
cylinder head.
2) If the measurement is below the service limit, replace the
bolt.
[1]
CYLINDER
HEAD HEIGHT