Piston Ring End Gap

    PISTON RING END GAP

    Four thousandths of an inch (0.004”), per inch of bore is the standard measurement we use for all TBparts piston ring kits. You can use the chart below to make sure your new TBparts piston ring kit falls in the safe clearance range. Running too tight of a clearance can cause seizure of the ring in the bore causing catastrophic piston failure. Running too loose of a clearance and you will lose compression there for horsepower and burn excess engine oil.

    Ring Gap Chart

    MM

    Inch

    Ring Gap   (0.004″ per inch)

    Range
           

    39mm

    1.535″

    0.006″

    0.0055″ – 0.0065″

    47mm

    1.85″

    0.0074″

    0.007″ – 0.008″

    50mm

    1.97″

    0.0078″

    0.0075″ – 0.0085″

    52mm

    2.05″

    0.008″

    0.007″ – 0.009″

    55mm

    2.165″

    0.0086″

    0.007″ – 0.009″

    55.5mm

    2.185″

    0.0087″

    0.007″ – 0.009″

    58mm

    2.28″

    0.009″

    0.008″ – 0.01″

    60mm

    2.36″

    0.0095″

    0.008″ – 0.0115″

    62mm

    2.44″

    0.0097″

    0.009″ – 0.012″

    63mm

    2.48″

    0.0099″

    0.009″ – 0.012″

    64mm

    2.52″

    0.01″

    0.009″ – 0.012″

    67mm

    2.637″

    0.01″

    0.009″ – 0.012″