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Rod Bearings

  1. Inspect journals for wear, taper and out-of-round. If specifications are exceeded, grind journals to undersize, or replace crankshaft. Inspect rod bearing shells for signs of fusion, pitting, burn or flaking and observe contact pattern. Rod bearings are available in 2 sizes. See ROD BEARING APPLICATION  table.
  2. Check bearing clearance using Plastigage. See CRANKSHAFT, MAIN & CONNECTING ROD BEARINGS  table under ENGINE SPECIFICATIONS. If clearance exceeds limit, install NEW standard bearing and measure clearance. If clearance still exceeds limit, use undersize bearing. Undersize bearing is identified by Red paint on bearing side and has thickness of .0632-.0635" (1.605-1.613 mm). Regrind crank pins to finished diameter. See ROD BEARING APPLICATION  table.
    ROD BEARING APPLICATION

    Connecting Rod Bearing Size Crank Pin Diameter - In. (mm)
    Standard 1.9678-1.9685 (49.982-49.999)
    Undersize .0098" (.025 mm) 1.9580-1.9586 (49.733-49.748)
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