PCV plugs?

Yonco · 02-28-2007, 10:27 PM

On my 302 the oil breather shoots out oil, after an hour of driving there is oil on my valvecover. Is tehre anyway to get around this? On the one side i covered the hole with a PCV blockoff rubber plug. Is it OK to block off both sides just to stop the mess, what will happen if it doesnt breathe? -Jon

67Sally · 02-28-2007, 10:32 PM

I'm pretty sure you can get sludge in your engine if it doesn't breathe but I think there are a few other negative effects which I can't remember off the top of my head. Why not just hook it up where it is supposed to go? Or you could go old school and just have a hose from the PCV valve which runs down the engine a bit and ends near the ground. I don't condone putting that stuff in the atmosphere though.

Brandontyler65 · 02-28-2007, 10:40 PM

ya pressure builds up and oil will get pushed out and cause leaks

LCC · 02-28-2007, 11:43 PM

sounds like you have a bit of blow-by....

JMD · 03-01-2007, 12:04 AM

Hook up a PCV valve to one valve cover, and a plug in filter to the other, this will keep the mess in the engine, and allow the crankcase proper ventilation.

If the crankcase is not ventilated, acids and varnish will acumulate in the crankcase and causegasket deteriationand other bad stuff.

If you do not havesome type ofsystem to positivly ventilate the crankcase, ANY engine will expell oil, your issue is not necessarily an indication of engine wear or excessive blowby.

67Sally · 03-01-2007, 12:31 AM

Did you check your piston rings? There are a few other things you'll have to check but that much oil shouldn't be shooting out.

boeing747arowair · 03-01-2007, 12:33 AM

can you post some pics to see the extent of oil being extruded? Blow by is horrible in my 96 i have experienced that alot when rpms are up on the high range! Not sure on how to get rid of it on that thing.! lol w.e

19stang66 · 03-01-2007, 03:03 AM

Im having the same problem you are. I need to get new valve covers with baffles and hook up a PCV valve correctly and it should solve my problems.

andrewmp6 · 03-01-2007, 05:37 AM

does your valve cover have a baffles and do you have roller rockers

mikethebike · 03-01-2007, 06:35 PM

Have you checked to see that both the filter on the drivers side AND the PCV/hose are breathing properly? If the valve or hose is clogged and not allowing vacum to reach the valve cover on the passenger side you will blow oil out the filter side due to crankcase pressures being far too high.
I had a Spitfire years ago that had an obstruction in the vacum line and it would lift the dip stick up enough to allow oil to blow out all over the side of the engine!