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Home >> Subaru >> 1986 >> RX >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> 1.8L 4-CYL & 1.8L 4-CYL Turbo - VINS [4,5,7] >> Overhaul >> Piston Pin

Piston Pin

  1. Check piston pins for damage, cracks, wear or distortion. Check clearance between connecting rod piston pin. Standard outer diameter of piston pin is .8265-.8268" (20.993-21.001 mm).
  2. Standard piston pin-to-connecting rod bushing bore press fit is 0-.0009" (0-.022 mm). If pin or bushing are worn beyond specification, replace bushing in connecting rod.
  3. To remove bushing from connecting rod, use Bushing Remover/Replacer (499037000) and an arbor press. Ream bushing to fit standard pin.
  4. To replace bushing, coat with oil and press bushing into position. Drill two .12" (3 mm) oiling holes in bushing and hone bushing bore. Bushing bore measurement is .8268-.8274" (21.000-21.016 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 .00004-.00059" (.001-.015 mm). Piston pin is a thumb push fit at 68°F (20°C).
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