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Home >> Audi >> 1982 >> 4000 Base, 2D Sedan >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Mechanical >> 4000 4-Cylinder >> Crankshaft Main & Connecting Rod Bearings >> Crankshaft Main Bearings

Crankshaft Main Bearings

  1. Main bearing caps are numbered 1 through 5 (front to rear). Never interchange bearing caps. Always measure main bearing clearances 1 at a time.
  2. Use Plastigage method for measuring bearing clearances. Ensure oil film is removed from bearing halves and crankshaft journal prior to measuring clearance.
  3. With Plastigage in place, install bearing cap and tighten to specification. Do not allow crankshaft to turn. Remove bearing cap. Measure flattened width of Plastigage with scale furnished to determine clearance.
  4. When replacing bearings, install grooved bearing halves into cylinder block. Plain bearing halves are installed in main caps. Lubricate crankshaft journal and bearings prior to installing bearings.
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