Valve Cover Breather Leaking Oil

[Masonb5]

Hey everyone i've had my 01 Cobra in storage for awhile over winter. Today i went to warm it up a lil and after about 5 minutes of running noticed some smoke coming from under the hood. After looking for the cause i found oil along the hose from the valve cover breather and some oil running down the engine right under it (not much just enough to run about an inch). I'm wondering if this is common after the car hasn't been run for awhile or what could be causing this. Any thoughts are appreciated, Thanks in advance.

 

[Hangman]

how do you have the lines hooked up for the breather lines? If you dont have enough "breathing" room, you will build up manifold pressure and blow a valve cover seal, right now it seems as if you are building manifold pressure and oil is being pushed through the path of least resistance. Check and double check you the routing of your breather lines, how about a pic of the engine bay to start.

 

[Masonb5]

 

[Boomer182]

Clamp may not be holding

 

[Hangman]

Did you remove the ball that acts as a pressure fitting for that PCV valve, if you drilled it out, try opening it up some more to allow some more breathing room. Otherwise it looks like it is plumbed correctly. I had an issue where i blew my valve cover gasket on the passenger side because there was to much manifold pressure. Try and open up that fitting and take it for another drive, also, take it for a gentle cruise and check it, then go more a spirited cruise, you dont have to go WOT but get on it and see if oil starts to seep through. This will tell you that you have restricted ventilation and have high manifold pressure. That breather is the weakest link and oil is finding its way through, if it gets worse or if you just make the seal tighter on the breather, the oil will find another path, most likely your valve cover gasket where the RTV meets with the block and the front timing chain cover, then next would be the gasket that surrounds the spark plugs between your valve cover and cylinder head. This is what happened to me. I fixed my issue by making sure there was enough "breathing" room for my motor. Double check and check again.

Not saying i am an expert, just going by personal experience, GL.

 

[Hangman]

quick question, where do you have the breather hose going from the driver side valve cover to the opposite side of the motor? :shrug: I cant see where it ends

 

[Masonb5]

The breather hose goes to the back of the intake right next to the supercharger. I messed with it a little bit last night and it's no longer leaking from the breather. It's now smoking from below the valve covers couldn't see exactly where. Be looking into it further after work.

 

[DSG2NV03]

Maybe just burning off residual oil that has leaked out and fallen on the exhaust?

 

[Masonb5]

thats what i'm guessing, figure now that the snow is gone and the salt is off the roads take it out and let it burn off any left on it. then start again