Mahle Piston

1. Using a micrometer, measure the piston diameter at right angles to the piston pin center line, 41.2 mm (1.622 inch) from the piston head.
Piston diameter: 87.453 - 87.467 mm (3.4430 - 3.4436 inch)
2. Measure the cylinder bore diameter in the thrust directions.
3. Subtract the piston diameter measurement from the cylinder bore diameter measurement.
Standard oil clearance: 0.033 - 0.059 mm (0.0013 - 0.0023 inch)
Maximum oil clearance: 0.08 mm (0.0031 inch)
If the oil clearance is greater than maximum, replace all the 6 pistons. If necessary, replace the cylinder block.

NOTE: The shape of the piston varies for the RH and LH banks. The RH piston is marked with "R", the LH piston with "L".