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)

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Piston Ring: Specifications

Piston Ring Thickness, Top 0.0461 - 0.0469 Inch (in)
Piston Ring Thickness, Second 0.0579 - 0.0587 Inch (in)
Piston Ring Thickness, Oil Control Rail 0.43 max Inch (in)
Piston Ring Thickness, Oil Control Spacer 1.574 - 1.651 Inch (in)
Ring-to-Groove Clearance, Top 0.04 - 0.08 Millimeter (mm)
Ring-to-Groove Clearance, Second 0.0012 - 0.0027 Inch (in)
Ring-to-Groove Clearance, Oil Control 0.090 - 0.106 Inch (in)
Ring Gap, Top 0.008 - 0.016 Inch (in)
Ring Gap, Second 0.014 - 0.022 Inch (in)
Ring Gap, Oil Rails 0.010 - 0.030 Inch (in)