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Home >> Subaru >> 1984 >> Brat Automatic >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> 1.6L 4-CYL - VIN 2 & 1.8L 4-CYL - VINS 4,5 >> Overhaul >> Piston Pins

Piston Pins

  1. Check piston pins for damage, cracks, wear or distortion. Check connecting rod bushing to piston pin clearance. Standard outer diameter of piston pin is .8267-.8271" (20.999-21.009 mm).
  2. Standard piston pin-to-connecting rod bushing bore clearance is .0002-.0016" (.005-.040 mm). If pin or bushing are worn beyond specification, replace bushing in connecting rod, and ream to fit standard pin.
  3. Inspect connecting rod bushing and replace if worn or damaged. Also measure piston pin clearance. Standard clearance between piston pin and connecting rod bushing is .0009" (.022 mm). To remove bushing from connecting rod, use Bushing Remover/Replacer (499037000) and an arbor press.
  4. To replace bushing, coat with oil and press bushing into position. Drill two .12" (3 mm) oiling holes in bushing and ream bushing bore. Bushing bore measurement is .8268-.8274" (21.00-21.016 mm). After installation, ream and clean bushing to remove chips.
  5. Check piston bore-to-piston pin clearance. Standard clearance between piston pin and piston bore is .0002-.0004" (.004-.010 mm). Piston pin is a thumb push fit at 68°F (20°C).
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