Fig. 2.341. Check of a face gap of a compression ring

Check a face gap "a compression ring – a piston flute", having measured it by the flat probe, as shown in the figure 2.341.

Nominal gap:

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 gap is more than admissible, replace the piston.