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

Piston ring width compression (top) 1.47 - 1.49 Millimeter (mm)
Ring width compression (bottom) 1.46 - 1.49 Millimeter (mm)
Ring width oil ring service limit (Side clearance) 0.15. Millimeter (mm)
MAX
Ring gap compression (top) 0.25 - 0.28 Millimeter (mm)
Ring gap compression (bottom) 0.25 - 0.28 Millimeter (mm)
Ring gap oil ring (steel rail) 0.04 - 1.68 Millimeter (mm)
Side clearance I string 0.04 - 0.08 Millimeter (mm)
Side clearance 2nd ring 0.04 - 0.09 Millimeter (mm)