Cylinder Block Assembly: Testing and Inspection

Piston and Cylinder Bore, Checking

Piston Ring Gap, Checking





Special tools, testers and auxiliary items required

• Feeler Gauge

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

To do this use a piston without piston rings.






Piston Ring Groove Clearance, Checking





Special tools, testers and auxiliary items required

• Feeler Gauge

- Clean the ring groove 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, offset 90° to the piston axis.

Deviation from nominal dimension: Max. 0.04 mm

Cylinder Bore, Checking





• The cylinder bore must not be measured if the cylinder block is secured to the engine stand using engine lateral bracket (T03001) , or the results may be incorrect.

Special tools, testers and auxiliary items required

• Cylinder Gauge (VAS 6078)

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

Deviation from nominal size: Max. 0.08 mm.

Piston and Cylinder Reconditioning Dimension






• 1 The measurement does not include the graphite coating, which is 0.02 mm thick. The graphite coating wears off.