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 Gap & Groove Clearance

Ring Groove Width, Top -
Ring Groove Width, Second -
Ring Groove Width, Oil Control -
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 Millimeter (mm)
Piston Ring Thickness, Oil Control Spacer 1.574-1.651 Millimeter (mm)
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 Millimeter (mm)
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)