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Home >> Mazda >> 1981 >> B2000 Base >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Mechanical >> MAZDA Engines - 4-Cylinder >> Crankshaft Main & Connecting Rod Bearings >> Main & Connecting Rod Bearings >> Installation

Main & Connecting Rod Bearings: Installation

  1. Fit 5 upper main bearings to cylinder block with oil grooved surface facing crankshaft thrust side. Fit new oil seal at rear of crankshaft. Insert side seals on both sides of rear bearing cap. Install main bearing caps. No. 1 through No. 4 bearing caps are marked for correct installation. No. 5 may or may not be indexed.
  2. Insert connecting rod assembly into cylinder as previously described. Fit upper bearing to rod and over crankshaft. Fit lower bearing to rod cap and install cap. Tighten all bolts to specifications.
    NOTE: Ensure engine is free to turn.
  3. End play is compensated for by thrust washers placed at No. 5 main bearing. Check crankshaft end play using a dial indicator. End play must not exceed 0.012" (0.305 mm). If specification is exceeded, thrust washers must be replaced. Thrust washers are available in 0.010" (0.25 mm) 0.020" (0.50 mm) and 0.030" (0.75 mm) oversizes.
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