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

Piston Ring, Engine

Compression Ring End Gap Measured In Cylinder Bore Top Groove Production 0.010-0.016
Service MAX 0.19
Second Groove Production MAX 0.018-0.026
Service MAX 0.31
Compression Ring Groove Clearance Top Groove Production 0.0012-0.0027
Second Groove Production 0.0015-0.0031
Service MAX 0.0033
Oil Ring Gap Production 0.010-0.029
Service MAX 0.035
Oil Ring Grove Clearance Production 0.0018-0.0037
Clearance MAX 0.0039