LT1-LT4 Modifications 1993-97 Gen II Small Block V8

what should my pcv valve be doing at idle?

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Old 03-01-2011, 05:53 PM
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Default what should my pcv valve be doing at idle?

I'm having issues with blow by. I have a breather where the oil fill tube originally was, a hose running from my pass side valve cover and my pcv valve hose running to a non pressurized hole in my duct work before the blower. I've been starting it and letting it run for only 30 seconds or so for a while trying to find a exhaust leak and when i did drive it, it was not ran for more than 5 min at a time for a while.
Old 03-01-2011, 07:28 PM
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What's the problem?

Alot of blowby means your engine is worn, not that your PCV valve isn't working.

Why can't you plumb the PCV valve according to stock configuration?

You have a breather on the passenger side valve cover, okay. Then you say you have a tube on the passenger side valve cover. Where does that go? On the driver side, you should have your PCV valve coming out of the manifold, then doing a 180-degree bend right back into the manifold. Correct?
Old 03-01-2011, 07:44 PM
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I don't have the 90 I removed that so I don't presurize the crankcase when the engine is in boost, or that was my thinking. I have the two hoses running into my rubber air intake right before the air filter. I know it's not going to function like a stock engine but it seems to be alot of blowby. the engine is fresh, maybee 5k miles on it. What would happen if i left the 90 elbow on???




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