Checking pistons, piston rings and cylinder diameter

Checking the thermal clearance of the piston rings

Drive the ring from above at a right angle to the lower hole of the cylinder, at a distance of about 15 mm from its edge.

Checking the clearance of piston rings in height

Before checking, clean the annular groove.

Piston check

Measure approximately 10 mm from the bottom edge, at right angles to the axis of the piston pin.

Maximum permissible deviations from the nominal size - max. 0.04 mm.

Checking the cylinder diameter

Take measurements criss-cross in three places in the transverse direction A and longitudinal direction B.

The maximum allowable deviation from the nominal size is 0.08 mm.

Note: It is not possible to measure the cylinder cavity if the cylinder block is fixed with the engine and gearbox tilter on the mounting stand, since measurement errors are possible.

Piston and cylinder dimensions

Note: Dimensions do not include graphite coating (thickness 0.02 mm) Graphite coating wears out over time.