1999 Volvo Penta "WT" Models Workshop Manual, Page 74Get this manual
Inspect: Crankshaft for bindingTurn crankshaft to check for binding!f the crankshaft does not turn freely, loosen the crankshaft bearing bolts, one pair at time, until the tight bearing is locatedBurrs on the bearing cap, foreign matter between the bearing and the block or the bearing cap, or faulty bearing could cause lack of clearance at the bearing Thread Repair
Damaged threads may be reconditioned by drilling rethreading, and installing suitable thread insertout,
Wear safety glasses to avoid eye damage
1Determine size, pitch, and depth of damaged threadIf necessary, adjust stop collars on cutting tool and tap to required depthRefer to the kit manufacturer's instructions regarding the size of drill and tap to be used