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 bottom of the cylinder opening 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

- Before measuring, clean the ring groove.





Pistons, Checking





Special tools, testers and auxiliary items required

• External micrometer 75 to 100 mm

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

Deviation from nominal dimension: Max. 0.04 mm.

Cylinder Bore, Checking





CAUTION!
Due to the factory coating on the cylinder walls, it is imperative the cylinders are NOT honed during any repair!

Special tools, testers and auxiliary items required

• Internal dial gauge 50 to 100 mm

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

Deviation from nominal size: Max. 0.08 mm.

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