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

Number of compressions rings 2
Number of oil control rings 1
No. 1 compression ring Molybdenum barrel faced
No. 2 compression ring Tapered and marked 'T or 'TOP'
Width of compression rings 1.478-1.49 mm (0.058-0.059 in)
Compression ring gap 0.40-0.65 mm (0.016-0.026 in)
Oil control ring type Hepworth and Grandage
Oil control ring width 3.0 mm (0.118 in)
Oil control ring gap 0.38-1.40 mm (0.015-0.055 in)