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Home >> Saab >> 1982 >> 900 S, 2D Hatchback, Automatic Trans >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Mechanical >> 900 & 900 Turbo 4-Cylinder >> Crankshaft Main & Connecting Rod Bearings >> Bearing Service

Bearing Service

  1. Remove connecting rods and main bearing caps. Measure journals with a micrometer. Out-of-round should not exceed 0.002" (0.051 mm). If crankshaft is near or over stated limit of wear, regrind journals and fit undersize bearings.
  2. Using "V" blocks and a dial indicator check crankshaft for bend. If bend exceeds 0.002" (0.051 mm), replace or repair crankshaft.
  3. Using Plastigage method, check main bearing and connecting rod bearing journals. If clearance is found excessive, combine undersize bearings to correct clearance. Undersize bearings are available in various thicknesses.
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