Service Limits & General Specifications

Cylinder Head
Outer Diameter of Cylinder Head Bolts





^ Inspect the cylinder head bolts before installing the cylinder heads.

CAUTION: Cylinder head bolts are tightened by degree rotation tightening method. Whenever the size difference between d1 and d2 exceeds the limit, replace the bolts with new ones.

Limit (d1 - d2) 0.11 mm (0.0043 inch)
^ If a reduction in outer diameter appears in a position other than d2, use it as the d2 measuring point.

CYLINDER HEAD DISTORTION
^ Clean the surface of the cylinder head. Use a reliable straightedge and feeler gauge to check the flatness of cylinder head surface.





^ Check along six positions as shown.
Head surface distortion
Limit 0.1 mm (0.004 inch)
^ If beyond the specified limit, resurface or replace it.
^ The limit for cylinder head resurfacing is determined by the cylinder block resurfacing.
Resurfacing Limit
Amount of cylinder head resurfacing is "A".
Amount of cylinder block resurfacing is "B".
The maximum limit : A + B = 0.2 mm (0.008 inch)





^ After resurfacing cylinder head, check that camshaft rotates freely by hand. If resistance is felt, cylinder head must be replaced.
Nominal cylinder head height "H" 126.3 - 126.5 mm (4.972 - 4.980 inch)





CYLINDER HEAD