Piston Rings, Cylinder Bores and Piston Checking

Piston Rings, Cylinder Bores and Piston Checking

Piston Ring Gap, Checking





Special tools, testers and auxiliary items required

• Feeler gauge

Test Sequence

- Push piston ring squarely from above down to approximately 15 mm from bottom end of cylinder.





Piston Ring Groove Clearance, Checking





Special tools, testers and auxiliary items required

• Feeler gauge

Test Sequence

- Before measuring, clean ring groove.





Cylinder Bore, Checking





Special tools, testers and auxiliary items required

• Internal dial gauge 50 - 100 mm

Test Sequence

- Measure bore at 3 locations in both directions - A - across engine and - B - in line with crankshaft.

Deviations from nominal dimension: max. 0.05 mm.

Piston: Installed position and allocation, piston/cylinder

Pistons are identified on piston head:

• Pistons 1 through 5: For cylinder bank 1

• Pistons 6 through 10: For cylinder bank 2

Positioning:

• Directional arrow on piston head points to intake side