New engine has loss of compression

DartVadar said

I did do that test, and everything seemed to hold solvent for a very long time and were all very even. So as far as I know the rings were sealing up well in the first place, so I guess iv'e got enough confirmation about the ring condition lol. I just was wondering why the vertical lines were there.

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Lol,, well,, you know that test works..lol

Because the mark travels the same distance as the top ring,, I'd guess it's from the top ring gap.. or the top ring picked up a piece of crap..

Do all cyls have a similar mark.??

The ring gaps are supposed to be on opposite sides of the piston, installed in line with the wrist pins (on a non thrust surface),, and will often migrate,, Having said that,, I've seen the gap stay pretty much where installed...

Ma Mopar had a disgruntled employee align all the ring gaps,, the warranty claims were huge..

hope it helps.. cheers