An engine is torn down after low miles and a recent overhaul because of smoking. Not related to the smoking, it is noticed that many of the crankshaft bearings have localized spots of wear. Technician A says that this is a normal condition for an overhauled engine. Technician B says the localized wear could be due to dirt that was left on the main saddles during the recent overhaul. Who is correct?

Question

Quizplus · Accepted Answer

Localized wear on crankshaft bearings is not a normal condition for an overhauled engine. Technician B's explanation that dirt left on the main saddles during the overhaul could cause this wear is a possible cause and therefore correct. Technician A's statement is incorrect.

An Engine Is Torn Down After Low Miles and a Recent