Crankshaft & Main Bearings
- Ensure main bearing caps are numbered for location. Ensure main bearing journal is within specification. See, in this article, CRANKSHAFT MAIN & CONNECTING ROD BEARINGS table under ENGINE SPECIFICATIONS. Position crankshaft on "V" blocks. Using a dial indicator, check crankshaft runout. If runout is not within specification, replace crankshaft.
- If any bearing clearance cannot be adjusted to standard specification, grind crankshaft and use undersize bearings. Tighten main bearing caps in sequence to specification. See Fig 1. See TORQUE SPECIFICATIONS TABLE at the end of this article.
NOTE:
Main bearing caps are numbered 1-5. Arrow on cap points toward front of engine.