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Connecting Rod Bearings

  1. Ensure rod caps are marked for cylinder identification. Remove rod cap and bearings. Inspect bearings for wear or damage and replace as necessary.
  2. Check crankshaft rod bearing journal for out-of-round or taper. Maximum crankshaft out-of-round or taper must not exceed 0.001" (0.03 mm).
  3. Check rod bearing clearance using the Plastigage method (as explained in Main Bearings). If clearance exceeds specifications, standard 0.001" (0.03 mm), or 0.002" (0.05 mm) undersize bearings may be used in combination to produce correct clearance. If clearance is still excessive, crankshaft must be reconditioned.
  4. Clean crankshaft journal and bearing surface in rod. Insert bearings in rod and cap, then lubricate bearing surfaces with oil. Pull piston and rod assembly down onto crankshaft. Install and tighten rod cap.
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