Measuring Piston-Ring End Clearance
WARNING: This page is about a different variant/trim than selected.
- Insert piston ring into the cylinder from the top to about 15 mm from the lower edge of the cylinder at a right angle to the cylinder wall.
Use a piston with no piston rings to slide it in.
- Measure piston-ring end clearance.
 Courtesy of PORSCHE CARS NORTH AMERICA, INC.
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Piston-ring end clearance
- 2.1 Guide a feeler gauge into the gap on the piston ring and determine the value > Piston-ring end clearance
| Piston ring |
New in mm |
Wear limit |
| 1st compression ring |
0.15-0.25 |
0.35 |
| 2nd compression ring |
0.30-0.45 |
0.55 |
| Oil scraper ring |
Cannot be measured |
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