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Measure Piston Ring End Gap - AR03.10-P-7311-02MR

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Engine 133, 139, 270, 274, 282 

CHECK VALUES FOR PISTON RINGS

Number Designation Engine 133 Engine 139
BE03.10-P-1002-05L Piston ring end gap Groove 1 mm 0, 18...0, 30 0, 18...0, 28
Groove 2 mm 0, 3...0, 5 0, 3...0, 5
Groove 3 mm 0, 2...0, 7 0, 2...0, 7
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-1002-05L Piston ring end gap Groove 1 mm 0, 2...0, 35 0, 18...0, 30
Groove 2 mm 0, 3...0, 5 0, 3...0, 5
Groove 3 mm 0, 2...0, 7 0, 2...0, 7
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 274.9 in model 167, 172, 205, 213, 218, 238, 253 Engine 274.910 as of 3/1/14 in model 204, 212 Engine 274.920 as of 3/1/14 in model 204, 207, 212
BE03.10-P-1002-05L Piston ring end gap Groove 1 mm 0, 2...0, 35 0, 18...0, 30
Groove 2 mm 0, 3...0, 5 0, 3...0, 5
Groove 3 mm 0, 2...0, 7 0, 2...0, 7
CHECK VALUES FOR PISTON RINGS

Number Designation Engine 282
BE03.10-P-1002-05N Piston ring end gap Groove 1 mm 0, 18...0, 28
Groove 2 mm 0, 3...0, 5
Groove 3 mm 0, 2...0, 7
  1. Clean cylinder barrel of cylinder liner (1) with suitable medium.
  2. Insert piston ring (2) in lower unworn area in cylinder barrel of cylinder liner (1) and align to cylinder liner (1).

    IMPORTANT Use a piston without piston rings for alignment.

  3. Measure end gap (arrow) on the piston ring (2) using a feeler gauge (3) and note result.

    IMPORTANT Measure end gap (arrow) on all piston rings (2).

    IMPORTANTCommercially available devices/tools 

    Feeler gauge

  4. Compare recorded values with values given in table

    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.

    If wear is identifiable on one piston ring (2):

    Replace all piston rings on the affected piston (2).

    G12816439Courtesy of MERCEDES-BENZ USA