Operation CHARM: Car repair manuals for everyone.

Piston Ring, Engine

Ring Groove Depth:
No.1 4.640 - 4.784 mm (0.182 - 0.188 inch)
No.2 4.575 - 4.719 mm (0.180 - 0.185 inch)
No.3 4.097 - 4.236 mm (0.161 - 0.166 inch)

END GAP:
Upper Ring:
New Fitting 0.025 - 0.51 mm (0.0098 - 0.020 inch)
Wear Limit 0.8 mm (0.031inch)
Intermediate Ring:
New Fitting 0.23 - 0.48 mm (0.009 - 0.018 inch)
Wear Limit 0.8 mm (0.031 inch)
Oil Control Ring:
New Fitting 0.25 - 0.64 mm (0.0098 - 0.025 inch)
Wear Limit 1.0 mm (0.039 inch)

SIDE GROOVE CLEARANCE:
Upper Ring:
New Fitting 0.030 - 0.080 mm (0.0011 - 0.0031 inch)
Wear Limit 0.010 mm (0.004 inch)
Intermediate:
New Fitting 0.025 - 0.065 mm (0.0010 - 0.0026 inch)
Wear Limit 0.010 mm (0.004 inch)

NOTE: Oil control ring three pieces, the oil ring side rails must be free to rotate after assembly.

Ring Width:
Compression Rings 1.47 - 1.50 mm (0.057 - 0.059 inch)
Oil Ring Pack 2.72 - 2.88 mm (0.107 - 0.1133 inch)