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 Specifications

Ring Gap Top Compression Ring Minimum 0.012
Maximum 0.022
2nd Compression Ring Minimum 0.022
Maximum 0.031
Oil Control (Steel Rails) Minimum 0.015
Maximum 0.055
Ring Side Clearance Compression Rings Minimum 0.0016
Maximum 0.0033
Oil Control (Steel Rails) Maximum 0.002
Maximum 0.008
Ring Width Compression Rings Minimum 0.060
Maximum 0.061
Oil Control (Steel Rails) Minimum 0.018
Maximum 0.019