Checking the gap in the piston ring lock of H4J and M4R engines (Renault Fluence 1)

Install the ring to be tested (7) into the cylinder.

Push the piston ring (7) to the middle of the cylinder using the piston (8).

Using a set of feeler gauges (9), measure the gap of the ring in the lock.

M4R Engine:

• upper compression ring - the gap is from 0.20 to 0.51 mm;
• lower compression ring - the gap is from 0.50 to 0.83 mm;
• oil scraper ring - the gap is from 0.15 to 0.78 mm.

H4J Engine:

• upper compression ring - the gap is from 0.20 to 0.30 mm;
• lower compression ring - the gap is from 0.35-0.50 mm;
• oil scraper ring - the gap is from 0.20 to 0.60 mm.