Thread: Measuring bearing clearance with Plastigauge
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Old 09-23-2010, 05:47 PM
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Stretch Stretch is offline
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Quote:
Originally Posted by John1 View Post
Army:

Thanks for the post, please keep in mind "plastigage will not give you a true reading for roundness and taper, but it is better than nothing. This why a "machinist" will not use palstigage but a mic instead.

I have been a machinist for 30 years and feel qualified to help out with your post and hope you take no offense.

God Bless
John
Hi John,

I completely agree - it is fiddly to get a good impression of roundness and taper with Plastigauge... they say it can be done though (well they would wouldn't they).

I think the benefit of using Plastigauge is that you can assess the "health" of a bearing once it is assembled. If for example I had measured a huge gap in my big end bearings I could then take the next step of measuring the crankshaft journal with a micrometer and more closely examining the shell bearing. To me Plastigauge is the first step measurement.

EDIT:- No offense taken John - comment is good that's the whole point of a forum isn't it?
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