Reseating the rings?

[Wrekker619]

I just replaced a head gasket on my 95 240sx. The head was only off less than a week. After days of checking, re-checking EVERYTHING, I finally took it to a friend of mine's shop. After him checking and re-checking everything I already did, he did a compression test and said I had to re-seat my piston rings. what's up with that? Said it had to have at least 90psi before the cylinder would fire??

[compactfean]

First off, if compression was fine before (except the cylinders where the hg was leaking) than cams aren't timed right. If everything is timed properly, I would suspect valves not seating properly, not rings. To get a accurate diagnostic of your issue a leak down needs to be performed.

[Wrekker619]

I had the head resurfaced, And I assume the did a valve job since it had that blue stuff all over the combustion chambers. And other than all the marks being lined up, how else would I time the cams? I've ran it a couple days now and it seems to run a little better each time...?
I don't know that the compression wasn't fine before, as I just got the car, but it did run ALLOT better. Very peppy.

Thanks compactfean... I'll do a leakdown test