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Home >> Mitsubishi >> 1987 >> Van LS >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> 1.8L 4-CYL - VIN [G], 2.0L 4-CYL [D], 2.4L 4-CYL [L] >> Removal & Installation >> Piston & Connecting Rod Assembly >> Fitting Pistons

Fitting Pistons

  1. After checking block for distortion, cracks, scratches or other abnormalities, measure bores at top, center and bottom of No. 1 piston ring travel for taper and out-of-round.
  2. If any cylinder has more than.0008" (.020 mm) taper or out-of-round, or if cylinder walls are badly scuffed or scored, block must be bored or honed and new oversized pistons and rings installed.
  3. Bore or hone all cylinders to same oversize. DO NOT  bore only one cylinder. Bore or hone cylinders in sequence, skipping adjacent cylinders to prevent heat distortion.
    NOTE: Replacement pistons are available in standard.25 mm.50 mm.75 mm and 1.0 mm oversizes. Oversize pistons are stamped on crown to indicate oversize.
  4. Measure outside diameter of piston by measuring at a point.079" (2.00 mm) from bottom of skirt below pin boss, and at 90 degrees to pin bore. Determine cylinder boring finish dimension.
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