I have smoke (looks like exaust) and oil blowing out of my valve cover from the breather tube. I am running a B16 with Greddy turbo kit... compression test 4 months ago showed 160, 150,60,160 psi Had leak down done and came up with 2 @ 20% leak one at 60% and the other that had 60 psi had 72% leak. I have no smoke or signs of oil burning from out of the exaust so I have come to think that it is not the pistons or rings or could it be? My thought is it is in the head...any ideas?

 

its blowby

 

Or damaged/worn valveseats. But the smart money is on blowby.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by USoMaChine &raquo;</TD></TR><TR><TD CLASS="quote">160, 150,60,160 psi Had leak down done and came up with 2 @ 20% leak one at 60% and the other that had 60 psi had 72% leak </TD></TR></TABLE>

Thats bad! I'd plan on doing a rebuild in the near future if I were j00.

 

ouch, check ur gaskets too

 

Same thing happened to my old b16a, cracked ringlands and pistonrings, time for a rebuild

 

What is the blowby caused from?
And im pretty sure its not the piston rings because it is not smoking out of the exaust. Or could it be?

 

blowby normallly means worn or broken piston rings

blowby is too much crankcase pressure