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

Side Clearance Compression (Top) 0.040-0.075 Millimeter (mm)
Compression (Bottom) 0.040-0.085 Millimeter (mm)
Oil Ring Snug Fit
Service Limit 0.10 Millimeter (mm)
Piston Ring Gap
Specification 82.4 mm diameter gauge
Gauge Diameter Compression (Top) 0.100-0.250 Millimeter (mm)
Compression (Bottom) 0.27-0.42 Millimeter (mm)
Oil Ring (Steel Rail) 0.15-0.65 Millimeter (mm)
Service Limit MAX Compression (Top) 0.50 Millimeter (mm)
Compression (Bottom) 0.65 Millimeter (mm)
Oil Ring (Steel Rail) 0.90 Millimeter (mm)