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Re: 180K + more questions about Compression Tests (archive)

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Posted by Chris W. on February 27, 2001 at 21:03:45:

In Reply to: 180K + more questions about Compression Tests posted by MarkPike on February 27, 2001 at 20:25:23:

It might be the testing equipment. Last year the local BMW Club held a technical session at the dealership where the head of the service department spoke about some things they do on a pre-purchase inspection. One of the tests they do is a compression test. He said not to worry about the absolute value of the test because the gauges weren't very accurate to begin with, and if they get shaken or get dropped, they'll be even less accurate. What he did say was important was that the compression value between cylinders be relatively even. I think he said 10% difference is supposed to be okay.

Chris W.


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