Pic. 2.341. Checking the End Gap of the Compression Ring
Check end clearance «compression ring - piston groove», measuring it with a flat probe, as shown in Figure 2.341.
Rated Clearance:
- compression ring No. 1 - 0.020–0.070 mm;
- compression ring No. 2 - 0.020–0.060 mm;
- oil scraper ring - 0.020–0.060 mm.
If the clearance is more than acceptable, replace the piston.