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 Bolt Torque




Cylinder Head Bolt Torque Sequence





Cylinder Head Bolt Torque Chart

Cylinder Head Surface Variation:

Inspect all surfaces with a straightedge if there is any reason to suspect leakage. If out-of-flatness exceeds 0.00075 mm/mm (0.000l in/in.) times the span length in any direction, either replace head or lightly machine the head surface.

Cylinder Head Bolt Re-Usability

Cylinder head bolts should be carefully examined before reuse. If the threads are necked down, the bolts should be replaced.





NOTE: Necking can be checked by holding a scale or straight edge against the threads. If all the threads do not contact the scale, the bolt should be replaced.