Originally Posted by
AndysR
Doesn't sound good, fingers crossed it's just a blocked PCV although you would have thought it shouldn't have blocked up after 2,000 miles and the engine should have been done when it was built.
If the PCV is all clear then you've got combustion gases either bypassing the rings or the valves and that is not good... Either way it shouldn't happen with or without forged pistons as the clearances should have been checked with a rebuilt engine the rings should be tighter to the bore and allow less combustion gases passed which should reduce crankcase pressure.... This is why I said on my project thread that you can't rely on honing marks in the bores as a good indication of wear it needs to be checked and measured...
Anyway fingers crossed it's just a simple PCV issue :)