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Compression loss on cylinder when rings line up Truth of fiction?
I have heard many people, including a couple of A&Ps, say that when
the rings on a cylinder all line up that the cylinder will loose compression. This doesnt make sense to me because if the rings are going to leak, then they would leak anyway. There is an air path between each ring for the air to go. The reason I am saying this is that my wifes RV-4 engine has a cylinder that is reading 55 psi on the compression check. She was advised to run it a few more hours and then recheck the compression because the rings might all be lined up and be causing the low compression. What say the experts. Old wifes tale or not? Regards, Tom Velvick |
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