Cylinder Block Assembly: Testing and Inspection

Piston, Rings and Cylinder Bore, Checking

Piston Ring Gap, Checking





Special tools, testers and auxiliary items required

• Feeler Gauge

- Insert the ring into the lower cylinder bore at a right angle from above, approximately 15 mm from the cylinder edge.






Piston Ring Groove Clearance, Checking





Special tools, testers and auxiliary items required

• Feeler Gauge

- Clean the groove for the ring before checking.






Piston, Checking





Special tools, testers and auxiliary items required

• Micrometer 75-100 mm (VAS 6071)

- Take the measurement approximately 10 mm from the lower edge of the piston skirt and offset 90° to the piston axis.

Deviation from nominal dimension: Max. 0.04 mm

Cylinder Bore, Checking





Special tools, testers and auxiliary items required

• Cylinder Gauge (VAS 6078)


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

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

Deviation from nominal size: Max. 0.08 mm.

• The cylinder bore measurement must not be performed if the cylinder block is secured to assembly stand using the engine and transmission holder (VAS 6095) , since inaccurate measurements are possible.