The right pistons depend on the condition of the cylinders and the machine work performed. Measuring before ordering avoids the wrong size and poor fit.
Measure the Cylinders
- Measure each bore for wear, taper and out-of-round with a bore gauge.
- Decide whether the cylinders can be honed or need to be bored oversize.
- Order pistons to match the final bore size.
Check Piston-to-Wall Clearance
- Measure the piston at the point specified by the manufacturer.
- Subtract from the finished bore size to get clearance.
- Too tight risks scuffing; too loose causes piston slap.
Other Checks
- Match compression height and dome or dish design to the original.
- Install rings with the correct end gap.
- Install pins and locks correctly and keep pistons matched to their cylinders.
Evergreen Parts
Evergreen offers pistons, rings and connecting rods identified by engine or vehicle application. Use the Evergreen eCatalog to find the right part, and see where to buy Evergreen through our authorized distributors.
