Measure Vertical Clearance Of Piston Rings - AR03.10-P-7311-01MRH

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Engine 264

CHECK VALUES FOR PISTON RINGS

Number	Designation			Engine 264.915	Engine 264.920
BE03.10-P-1001-05L	Piston ring vertical clearance	Groove 1	mm	0, 04...0, 08	0, 035...0, 075
		Groove 2	mm	0, 03...0, 07	0, 02...0, 06
		Groove 3	mm	0, 01...0, 18	0, 19...0, 31

There should be no combustion residues in the piston ring groove during measurement.

Otherwise a false measurement will be taken.

Measure the height clearance of the plain compression ring (1) in groove 1.
Commercially available devices/tools

Feeler gauge

If height clearance is outside tolerance

↓

Replace the plain compression ring (1), taper-faced hook scraper ring (2), and oil scraper ring together with the piston (3).
Measure the height clearance of the taper-faced hook scraper ring (2) in groove 2.

Courtesy of MERCEDES-BENZ USA

Commercially available devices/tools

Feeler gauge

If height clearance is outside tolerance

↓

Replace the plain compression ring (1), taper-faced hook scraper ring (2) and oil scraper ring together with the piston (3).
Measure the height clearance of the oil scraper ring in groove 3.
Commercially available devices/tools

Feeler gauge

If height clearance is outside tolerance

↓

Replace the plain compression ring (1), taper-faced hook scraper ring (2), and oil scraper ring together with the piston (3).