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Old 06-22-2009, 11:17 AM   #4
boost junkie
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Member#: 68273
Join Date: Aug 2004
Chapter/Region: MAIC
Location: Silver Spring, MD
Vehicle:
2012 WRX
GD Race Car in progress

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Quote:
Originally Posted by generalee69 View Post
Are people cracking ring lands on forged pistons? I broke a ring land last summer on the stock pistons and just had the engine rebuilt with Mahle forged pistons.

I'm not trying to argue with you, just playing devils advocate... Wouldn't a broken ringland lead to blow by through the PCV system? Not through the valve cover breather?

That's what still doesn't add up to me... why was the valve cover pushing so much oil.
Ah, didn't realize you had forged pistons. It's still possible to damage a ringland with detonation but it seems more likely that it's a turbo issue. I'd start there. Although I'm not sure why you would be blowing oil out the valve cover breather in that situation. Hopefully someone else will offer an opinion about that.
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