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Why is it necessary to wipe dry bearing and journal before using a plastigauge when measuring bearing clearance?
Wiki User
∙ 13y ago
You wouldn't want oil to be taking up part of your clearance and give a false reading with the plastigage.
Wiki User
∙ 13y ago
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What tool is used to check the oil clearance of a plain bearing in a single piece crankshaft?
Plastigauge
What is plastigauge?
Plastigauge is the name given to a precise method of measuring clearances between bearing surfaces using a plastic material. It consists of a material with precise known dimensions and deformation characteristics. The plastigauge material is sandwiched between the clean bearing surfaces. The dimensional clearance is then determined by comparing the amount that the gauge material has expanded or flattened. Dimensions of better than .oo1 inch can be accurately measured by this method. The material is usually color coded to indicate the range of measurement use for each gauge.
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Bearing clearance is the distance between the crankshaft journal and the bearing surface. It is usually referred to as oil clearance, as that's what is occupying the space.
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