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

Head Bolt Re-Usability

INSPECT CYLINDER HEAD BOLTS






Using vernier calipers, measure the thread outside diameter of the bolt.
Standard outside diameter: 9.810 - 9.960 mm (0.3862 - 0.3921 inch)
Minimum outside diameter: 9.700 mm (0.3819 inch)

If the diameter is less than the minimum, replace the bolt.