Contents Wiring diagrams Section: Mechanical All sections

Crankshaft & Main Bearings Buick Roadmaster VIII

  1. If bearing clearance is greater than specification, replace with undersized bearings. See CRANKSHAFT, MAIN & CONNECTING ROD BEARINGS table under ENGINE SPECIFICATIONS. Recheck bearing clearance using Plastigage.
  2. Tighten main bearing caps finger tight. Pry crankshaft rearward and then forward to align rear main bearing thrust surfaces. Retighten main bearing caps to specification. See «TORQUE SPECIFICATIONS»(ref-49883-S03067805252001011600000) .