Piston and Cylinder Bore, Checking

Piston and Cylinder Bore, Checking

Piston Ring Gap, Checking





Special tools, testers and auxiliary items required

• Feeler gauge (commercially available)

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

- Determine the ring gap using the feeler gauge.





Piston Ring Groove Clearance, Checking





Special tools, testers and auxiliary items required

• Feeler gauge (commercially available)

- Before measuring, clean ring groove.

- Determine the ring to groove clearance using the feeler gauge.





Cylinder Bore, Checking





Special tools, testers and auxiliary items required

• Internal dial gauge 50 to 100 mm (commercially available)

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

Deviation from nominal dimension: max. 0.10 mm

• Cylinder bore measurement must not be performed if cylinder block is secured to assembly stand with holding fixture ( VW 540 ), since inaccurate measurements are possible.