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 GROOVE DEPTH
No.1 91.55 - 91.80 mm (3.604 - 3.614 inch)
No.2 90.75 - 91.0 mm (3.575 - 3.583 inch)
No.3 92.53 - 92.79 mm (3.643 - 3.653 inch)

PISTON RING GAP
Top Compression Ring 0.30 - 0.46 mm (0.012 - 0.018 inch)
2nd Compression Ring 0.56 - 0.79 mm (0.022 - 0.031 inch)
Oil Control (Steel Rails) 0.25 - 076 mm (0.010 - 0.030 inch)

PISTON RING SIDE CLEARANCE
Top & 2nd Compression Rings 0.040 - 0.085 mm (0.0016 - 0.0033 inch)
Oil Ring (Steel Rails) 0.046 - 0.201 mm (0.0018 - 0.0079 inch)