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PISTON RING CLEARANCE INSPECTION [WITH DIESEL PARTICULATE FILTER]

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1. Measure the piston ring-to-ring groove clearance around the entire circumference. Replace the piston and piston ring if necessary.

Standard clearance

  Top: 0.05-0.09 mm {0.0020-0.0035 in}
  Second: 0.04-0.08mm {0.0016-0.0031 in}
  Oil: 0.03-0.07mm {0.0012-0.0027 in}

Maximum clearance

  0.15 mm {0.0059 in}

2. Insert the piston ring into the cylinder by hand and use the piston to push it to the bottom of the ring travel.

3. Measure each piston ring end gap using a feeler gauge. Replace the piston ring if necessary.

Standard end gap

  Top: 0.20-0.30 mm {0.008-0.011 in}
  Second: 0.20-0.30 mm {0.008-0.011 in}
  Oil rail: 0.20-0.30 mm {0.008-0.011 in}

Maximum end gap

  1.0 mm {0.039 in}