oil out the breather.. - Chevy Nova Forum
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Old 15th-August-2011, 06:28 PM   #1
skatekid210
 
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oil out the breather..

i have oil that keeps coming out of my valve cover breather and burning up on my headers.. is there to much crank case pressure how can i fix this anyone thanks.

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Old 15th-August-2011, 06:32 PM   #2
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Is the PCV system hooked up correctly? Valve cover baffles installed?
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Old 15th-August-2011, 07:05 PM   #3
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how can i check if its working properly?? and baffles idk what that is?? i put a new breather..still leaks
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Old 15th-August-2011, 07:31 PM   #4
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do you have 1 pcv valve and 1 breather?
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Old 15th-August-2011, 07:43 PM   #5
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do you have 1 pcv valve and 1 breather?
yes sir one breather and one pcv valve
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Old 15th-August-2011, 11:49 PM   #6
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baffels are inside the cover to stop the oil from being expelled or drawn out of the engine. It is a metal box that allows air to pass and not oil. If you just have a hole in the cover then it will cause issues.
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Old 16th-August-2011, 12:34 AM   #7
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baffels are inside the cover to stop the oil from being expelled or drawn out of the engine. It is a metal box that allows air to pass and not oil. If you just have a hole in the cover then it will cause issues.
i think i have them when i took the covers off and flipped the over i couldnt see through the hole it had a thin metal think over the hole..
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Old 16th-August-2011, 01:33 AM   #8
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That would be the baffle.
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Old 16th-August-2011, 10:56 AM   #9
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That would be the baffle.
so do you think i need better baffles or is it most likely something else cause my leak
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Old 16th-August-2011, 10:58 AM   #10
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Where is the vacuum line attached for the PCV valve?
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Old 16th-August-2011, 12:03 PM   #11
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If the pcv is hooked up right & oil is blowing past the baffle, or when you look in the pcv grommet while running & it has smoke puffing out, it means your piston rings are shot. Cylinder pressure is blowing past your rings. "Blow by".
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Old 16th-August-2011, 04:05 PM   #12
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Where is the vacuum line attached for the PCV valve?
the line goes from the pcv spits to the carb and to the brake booster connected with a T..
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Old 16th-August-2011, 04:16 PM   #13
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If the pcv is hooked up right & oil is blowing past the baffle, or when you look in the pcv grommet while running & it has smoke puffing out, it means your piston rings are shot. Cylinder pressure is blowing past your rings. "Blow by".
it does have smoke coming out but the motor was recently rebuilt about 3 years ago and has to be less the 5000 miles could the rings go bad that soon
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Old 16th-August-2011, 05:02 PM   #14
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There are lots of factors that can contribute to this. Were the cylinders bored, were the valve guides replaced? To some rebuilding is new rings, bearings and gaskets. If this is the case then it may take some machine work and new parts to make it stop.
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Old 17th-August-2011, 04:04 PM   #15
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There are lots of factors that can contribute to this. Were the cylinders bored, were the valve guides replaced? To some rebuilding is new rings, bearings and gaskets. If this is the case then it may take some machine work and new parts to make it stop.
yes it was bored but did not replace the valve guides.. i used the old heads from my 305 and those were just bolted right on 40 yrs old... do you think it could be the heads need to be rebuilt or get new ones ive been wanting to get some bigger heads anyways.. also my car has been getting really hot lately i dont know if this is part of the problem.. i kinda just figured its getting hot because of these 100 plus degree weather we ve been having this summer in texas.. i did check the hoses and i have good suction. my father told me if i had bad rings my car would be blowing smoke out the exhausted and major loss in power which is not the case it runs really good it just fills my car with smoke when i run my ac..any ideas??
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