Question

technician a says that when using plastigauge, plastigauge that becomes wider indicates a smaller oil clearance between a crankshaft and main bearing. technician b says the plastigauge will become narrower when bearing oil clearances are smaller. who is correct?

Answer 1

Each Tech is correct. The clearance between the crankshaft and X and Y on the bearing is measured using plactigage, according to Tech A, while the clearance is measured using a dial indicator, according to Tech B.

A thin calibrated plastic strip serves as a plastic gauge. It can be used to measure gaps and monitor bearing clearance. It is utilized at locations on crank or connecting rod bearings where a micrometer measurement cannot be made quickly. You must use cylinder liner shims or a bigger flange height cylinder liner to increase the protrusion height if the new cylinder liner falls short of the engine manufacturer's specifications.

Learn more about specifications here-

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