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

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Engine 133, 139, 270, 274, 282

CHECK VALUES FOR PISTON RINGS

Number	Designation			Engine 133	Engine 139
BE03.10-P-1001-05L	Piston ring vertical clearance	Groove 1	mm	0, 02...0, 065	0, 02...0, 065
		Groove 2	mm	0, 02...0, 06	0, 02...0, 06
		Groove 3	mm	-	0, 03...0, 2

CHECK VALUES FOR PISTON RINGS

Number	Designation			Engine 270.910 up to 2/28/14 except code 933 (Add.parts f.telematic alarm identific.) Engine 270.920 up to 2/28/14 except code 924 (Bivalent natural gas drive)	Engine 270.910 up to 2/28/14 with code 933 (Add.parts f.telematic alarm identific.) Engine 270.910/920 as of 3/1/14 Engine 270.920 up to 2/28/14 with code 924 (Bivalent natural gas drive)
BE03.10-P-1001-05L	Piston ring vertical clearance	Groove 1	mm	0, 04...0, 075	0, 04...0, 075
		Groove 2	mm	0, 03...0, 07	0, 03...0, 07
		Groove 3	mm	-	-

CHECK VALUES FOR PISTON RINGS

Number	Designation			Engine 274.910 up to 2/28/14 in model 204, 212 Engine 274.920 up to 2/28/14 in model 204, 207, 212	Engine 274.910 as of 3/1/14 in model 204, 212 Engine 274.910 in model 172, 205, 213 Engine 274.920 as of 3/1/14 in model 204, 207, 212 Engine 274.920 in model 172, 205, 213, 218, 238, 253
BE03.10-P-1001-05L	Piston ring vertical clearance	Groove 1	mm	0, 04...0, 075	0, 04...0, 075
		Groove 2	mm	0, 03...0, 07	0, 03...0, 07
		Groove 3	mm	-	-

CHECK VALUES FOR PISTON RINGS

Number	Designation			Engine 282
BE03.10-P-1001-05N	Piston ring vertical clearance	Groove 1	mm	0, 03...0, 08
		Groove 2	mm	0, 04...0, 08
		Groove 3	mm	0...0, 17

Measure the side clearance of the plain compression ring (1) in groove 1 and the taper-faced hook scraper ring (2) in groove 2 using a suitable feeler gauge (4) Engine 282
Engine 133

Engine 139

Engine 270.910/920 as of 3/1/14

Engine 270.920 up to 2/28/14 except code 924 (Bivalent natural gas drive)

Engine 270.920 up to 2/28/14 with code 924 (Bivalent natural gas drive)

Engine 274.910 as of 3/1/14 in model 204, 212

Engine 274.910 in model 205

Engine 274.910 up to 2/28/14 in model 204, 212

Engine 274.920 as of 3/1/14 in model 204, 207, 212

Engine 274.920 up to 2/28/14 in model 204, 207, 212.

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

The side clearance of the oil scraper ring in groove 3 cannot be checked due to its three-part structure.

If wear is identifiable:

↓

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

Courtesy of MERCEDES-BENZ USA

Shown on piston (for engine 274)