Hmm, Oil problems and Blown Headgasket, any ideas?

we used an expander but when we bought the pistons they came in a box together with just some plastic wrapped around them. We had to file some of the knicks out and the seller wouldnt do anything about it and wouldnt even discount em. Im guessing that we could of missed one of the knicks but im pretty sure we checked all the grooves. who knows....
 

IJ.

Grumpy Old Man
Mar 30, 2005
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I come from a land down under
I'm sure some of the guys will jump in with opinions soon!

It just doesn't make sense to do all that work halfassed when to do it right isn't really anymore work and not that much more expensive.