Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Cylinder Head Surface Variation -- Warpage





Fig. 1 Check cylinder head for distortion
- Using straightedge and feeler gauge, check cylinder head for distortion at multiple points.
Cylinder head distortion must not exceed 0.1 mm (0.004 inch)