Cylinder Block Assembly: Testing and Inspection

Piston and Cylinder Bore, Checking

Piston Ring Gap, Checking





- Push the ring squarely from above, down to approximately 15 mm from the bottom end of the cylinder. To do this use a piston without rings.






Piston Ring Groove Clearance, Checking





- Clean the ring groove of the piston before checking.






Piston, Checking

Special tools, testers and auxiliary items required

• Micrometer 75-100 mm (VAS 6071)

- Measure the piston approximately 10 mm from the bottom edge and at points offset 90° to the piston pin axis.






• Deviation from nominal dimension: Max. 0.04 mm

Cylinder Bore, Checking

• Measurement of the cylinder bore must not be performed when the cylinder block is mounted on the engine and transmission holder (VAS 6095) , false measurements are possible.

Special tools, testers and auxiliary items required

• Cylinder Gauge (VAS 6078)

• Inside Micrometer Set 18-100 mm (US1033/S)

Do not bore, hone, grind or rework the cylinder bores with shop tools. Reworking damages the surface of the cylinder bore.

- Measure diagonally at 3 positions transversely - A - and longitudinally - B -.






• Deviation from nominal dimension: Max. 0.08 mm






• 1 Dimensions without the graphite coating (0.02 mm thick). The graphite coating wears off.