New engine has loss of compression

mopowers said
Did you ask your engine builder about the vertical marks?

No not yet, I didn't really look much into them until just recently, I will ask though.

inertia said
Well,, if you'd done that solvent test I mentioned,, it's woulda given you an indication, and confirmed that...

tried to help.. cheers

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.