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Compression Test Help Needed 200 84

posted by  someone claiming to be Randolph on  Wed Nov 29 11:30 CST 2000 [RELATED]

Since it looks like I’ll be rebuilding the head, I thought I’d look at the bottom end of the engine too (B-21FT).

I did a compression test, this time taking compression readings with a "dry" cylinder and a second with a squirt (about a tablespoon)of oil into the cylinder. Results are as follows in psi:

Cylinder No Oil Oil

1 100 130

2 120 120

3 110 120

4 120 130

2-4 are pretty close but #1 seems a bit off. I have heard that the #1 cylinder wears more than the other three but I don’t know if there is too much difference in pressure readings to indicate a rebuild to the block.

How much difference is too much and what other things should I be looking for?

Thanks—I really do appreciate the information.





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New Compression Test Help Needed [200][84]
posted by  someone claiming to be Randolph  on Wed Nov 29 11:30 CST 2000 >


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