By the way, if you are not familiar with Plastigage, it is a neat product that has been around for a zillion years. Plastigage is a squishable plastic material that is made to a very precise diameter. When you put it between two parts and squeeze them together, the plastigage flattens out to the thickness of the gap between the two parts. Thus, since the diameter was known, the cross sectional area is known. From that, the width of the squished part is a function of the thickness of the squished part....the area stays the same as before the squish....from a pictorial width chart on the package, you match the width of the squished section of plastigage to the chart and it tells you the thickness of your clearance gap. It's easy and requires no expensive tools.

It works for rod bearing clearances and main bearing clearances. The plasticgage comes in several thickness ranges and is color coded so you know which one you are using.

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