JLT PCV Valve Pre Filter

[c3po]

I have a 2004 Mercury Marauder with the DOHC 4.6 Engine. There is a Breather tube that goes from the valve cover to the Cold Air Induction Hose right near the throttle body.

This car has 28,000 miles and I drive it conservatively, so I did not think there would be any oil in the breather hose, I was wrong.

When I took the hose off to put this Pre Filter on there was a small amount of oil that came out. This is a great mod for anyone that has a 4.6 Engine. It seems these motors like to throw oil around the PCV System.

I do not need any oil mist getting inside my throttle body, this device is easily cleaned by using something like Brakleen.

 

[mechtech2]

Don't reduce flow with your modification.

If you get oil the 'wrong' way with a stock system, make sure there is not a reason. A little dampness is normal. Vapors when you turn off the engine, and actual flow when you are at full throttle or a backfire will show up. Excessive blowby will do this, also.

There is nothing wrong with an additional oil separator/filter, but if it is at the cost of flow, it is a bad trade off.

 

[c3po]

Originally Posted By: mechtech2
Don't reduce flow with your modification.

If you get oil the 'wrong' way with a stock system, make sure there is not a reason. A little dampness is normal. Vapors when you turn off the engine, and actual flow when you are at full throttle or a backfire will show up. Excessive blowby will do this, also.

There is nothing wrong with an additional oil separator/filter, but if it is at the cost of flow, it is a bad trade off.


Thanks for the info, this device has a K&N type media inside, I could blow through the thing.

My small block chevy's breather tube even has a foam type filter on it.

Supposedly this device lets the air travel through but it traps the oil vapors.

 

[c3po]

I am noticing that since I have put this device on my gas mileage has gone from 23.5 m.p.g. to 24.35 m.p.g.

I may have to attribute some of this increase on m.p.g. to the fact that I am running a Maintenance Dose of MMO every other tank of gas.