Crankshaft & Main Bearings
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- Inspect bearings for wear or damage. Replace as necessary. Using Plastigage, check bearing clearance. See CRANKSHAFT , MAIN & CONNECTING ROD BEARINGS table under ENGINE SPECIFICATIONS. Bearings are available in standard and undersize. If necessary, different size upper and lower bearings may be installed to obtain correct oil clearance. Lubricate bearings before installation.NOTE: If different size bearings are used, odd size bearings must all be uniform in location (upper or lower). DO NOT use bearings with a thickness difference exceeding .001" (.03 mm).
- Install upper bearing inserts. Install bearing caps and lower inserts. Tighten bearing caps in 3 stages to specification. Rotate crankshaft to ensure freedom of movement after tightening each cap. See, at the end of the article, TORQUE SPECIFICATIONS . See CRANKSHAFT , MAIN & CONNECTING ROD BEARINGS table under ENGINE SPECIFICATIONS.