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

DIMENSIONS
Gasket Surface Distortion:
Standard: 0.03 mm (0.0012 inch)
Maximum: 0.06 mm (0.0024 inch)
Seating Distortion Intake and Exhaust Manifolds (Maximum): 0.10 mm (0.004 inch)