Quick question. My last post I was needing some with what I thought was something leaking oil above my oil filter. Come to find out that after taking off the intake manifold, I saw that there was oil in it. I looked through some forums and some people were saying it could be caused by the PCV Valve. Anyways not really sure what to do now. Any help would much appreciated!!! Thanks!

 

or also to your valve cover vents, oil in your intake is pretty common just clean it up theres really not much you can do unless your pcv is having issues or take the vent hoses off your intake. ive heard its actually a good thing just not excessive amounts obviously

 

PCV, head breather, general vehicle usage. Its pretty normal.

 

Won't matter if you replace the PCV valve or not. This is normal in higher mileage engines. You could try cleaning out the intake manifold, also remove the valve cover and clean baffles on the inside of the cover, a new PCV valve and hose. This may work for a while. Whatever you do don't disconnect the PCV and run a breather. That does not help anything.

Keep all of the hoses as they are, one from the intake tube to the valve cover feeds fresh clean air into the valve cover/crank case. While the hose from the valve cover to the intake manifold sucks dirty old crank case gasses/blow by out of the engine. You need this to be clean and free flowing. If you are getting really bad blow by you could look into a catch can setup to separate the fluid oil from the gases. It can be as easy as placing an simple oil trap/fluid separator in the line between the valve cover and intake manifold.

 

Awesome, thanks for help guys! Really appreciate it!

 

Hey ghost, is there any actual benefit having crankcase breather filter(s)?

 

Where do you plan on putting them? A breather on the fresh air side of the positive crankcase ventilation system will not really gain you anything. A breather on that part would only stand to replace the hose that goes between the filtered air from the intake tube to the valve cover. More for looks than anything.

A breather on the exit side of the system would be counter productive. As it would require energy from the engine to push the gases out of the crankcase. IMO for a naturally aspirated engine you shouldn't remove the vacuum from the PVC system.

 

GhostAccord covered it.

On higher mileage cars it's just a simple build up of oil mist the becomes that coating you see. Can be cleaned with some TB/carb cleaner, or by seafoaming the engine every ~30Kmiles will help remove the buildup.

Installing one of these...

...will let you know if there is excessive oil being sucked into the manifold.
If the PCV valve is gunky clean it up with some TB/Carb spray, make sure it rattles, and changes when opening and closing the throttle.

Removing or changing the PCV system on a street car or stock drivetrain is pointless. If it is fully functional it will aid in piston ring sealing at part throttle, as well as remove crankcase gases.

Operation of PCV valve:

 

Even on a high mileage car I've never seen so much gunk buildup inside the head ever.

How is your car running ?