Cylinder Head Assembly: Specifications

CYLINDER HEAD DISTORTION LIMIT
Limit of distortion 0.05 mm (0.002 inch)


NOTES:
- Check cylinder head for cracks in intake and exhaust ports, combustion chambers, and head surface at a total of 6 locations. If distortion limit, given above, is exceeded, correct gasketed surface with a surface plate and abrasive paper of about #400 (Waterproof silicon carbide abrasive paper): Place paper on and over surface plate, and rub gasketed surface against paper to grind off high spots. Should this fail to reduce thickness gauge readings to within limit, replace cylinder head.
- Leakage of combustion gases from this gasketed joint is often due to warped gasketed surface: such leakage results in reduced power output.





MANIFOLD SEATING FACES DISTORTION LIMIT
Limit of distortion 0.10 mm (0.004 inch)

NOTE: Check seating faces of cylinder head for manifolds, using a straightedge and thickness gauge, in order to determine whether these faces should be corrected or cylinder head replaced.