Measuring Pistons and Cylinders

MEASURING PISTONS AND CYLINDERS





Cylinder

D1 = Measuring point for wear and ovality

30 mm beneath upper edge of cylinder

The cylinder is worn when the diameter at this measuring point exceeds the original diameter by 0.08 mm. The ovality of the cylinder is measured by comparing axes a and b. The difference between a and b must not exceed 0.04 mm.

D2 = Measuring point for piston ring end clearance

Rings pushed in at level of cylinder base gasket.



Pistons

D = Measuring point for wear

Mahle piston = 18 mm
KS piston = 10 mm

If the running clearance exceeds 0.12 mm, renew piston and cylinder. The running clearance is the difference between the largest cylinder diameter and the smallest piston diameter.