The PCV system on our cars, especially under boost, has a tendency suck up quite a bit of oil vapor and builds up a nasty coat on the inter cooler. The PCV works by pulling some air from the intake through the passenger side valve cover. The air passes from one side of the motor to the driver side cover and into the blower. There is another that Ts off from this last line into the lower intake - possibly Ford's attempt to mitigate oil from passing through the inter cooler but it doesn't work.
See Picture
Here is a picture of what my remote breather picked up after 1000 miles of not so gentle driving.
Here are the typical options people use to approach this:
1. Catch Can in line of the PCV.
Pros: Retains PCV functionality.
Cons: Doesn't perform very well especially under high boost - oil just passes straight through. Works better for NA applications.
2. Breathers on valve covers
Pros: Deletes PCV completely
Smoother idle due to not having idle air weaving through the engine
Cons: Oil dirties up surrounding area.
3. Breather on one Valve Cover. PCV still connected on other.
Pros: None
Cons: Vacuum Leak
Still pulling oil vapor
Worse gas mileage
Unmetered air.
This is bad. I don't know why so many do this but you are effectively drawing air through the motor without it going through the MAF.
4. Remote breather to both covers
Pros: Smoother idle, clean intake. Gunk pools in can.
Cons: None
Anyways here are the following parts you'll need.
(1) Moroso 85470 Breather Tank with 3/8 NPT inlet (Online)
(1) 3/8NPT to 5/8 Barb Fitting (mom and pop hardware store)
(2) Dorman/Help PCV Ford elbow. Should be a straight grommet fitting on one end and a 5/8" hose end on the other. (Vatozone/Oreillys PCV section)
7ft 5/8" Hose
(1) 5/8" T (mom and pop hardware store)
Vacuum Cap Pack with big caps (Vatozone/Oreillys)
Zip Ties
Here's the parts. There's only one vacuum cap pictured here.
Fit one end of the hose into the PCV elbow and lay across. You can see the place I chose to put my can. Be sure that the can isn't bending over away from the car - as it can hit the cowl on the hood if it's not pointing straight up. Cut line when it comes next to the can.
Here's the routing for the other side. Route it so it make a smooth loop around so the oil can drip down towards the tank. Also be sure to do it like this so you can zip tie the hose to the crossover pipe or (I don't an expansion tank) the expansion tank. Put in T connector and cut appropriate amount of hose to connect the T and the expansion tank.
Everything completed. Cap the passenger side PCV fitting on the intake and the plastic tube near the old location of the PCV valve. However, it would be best to cap the lower intake and the blower separately if you have the patience to pull off all those lines.
Note how the line evenly slopes down to expansion tank.
You can use AN fittings/line or put the catch can somewhere else (fender well?) but I chose to do it this way as it's cheap and easy to access.
NOTE: RETAIN ALL PCV items removed. This mod will not pass inspection.
See Picture
Here is a picture of what my remote breather picked up after 1000 miles of not so gentle driving.
Here are the typical options people use to approach this:
1. Catch Can in line of the PCV.
Pros: Retains PCV functionality.
Cons: Doesn't perform very well especially under high boost - oil just passes straight through. Works better for NA applications.
2. Breathers on valve covers
Pros: Deletes PCV completely
Smoother idle due to not having idle air weaving through the engine
Cons: Oil dirties up surrounding area.
3. Breather on one Valve Cover. PCV still connected on other.
Pros: None
Cons: Vacuum Leak
Still pulling oil vapor
Worse gas mileage
Unmetered air.
This is bad. I don't know why so many do this but you are effectively drawing air through the motor without it going through the MAF.
4. Remote breather to both covers
Pros: Smoother idle, clean intake. Gunk pools in can.
Cons: None
Anyways here are the following parts you'll need.
(1) Moroso 85470 Breather Tank with 3/8 NPT inlet (Online)
(1) 3/8NPT to 5/8 Barb Fitting (mom and pop hardware store)
(2) Dorman/Help PCV Ford elbow. Should be a straight grommet fitting on one end and a 5/8" hose end on the other. (Vatozone/Oreillys PCV section)
7ft 5/8" Hose
(1) 5/8" T (mom and pop hardware store)
Vacuum Cap Pack with big caps (Vatozone/Oreillys)
Zip Ties
Here's the parts. There's only one vacuum cap pictured here.
Fit one end of the hose into the PCV elbow and lay across. You can see the place I chose to put my can. Be sure that the can isn't bending over away from the car - as it can hit the cowl on the hood if it's not pointing straight up. Cut line when it comes next to the can.
Here's the routing for the other side. Route it so it make a smooth loop around so the oil can drip down towards the tank. Also be sure to do it like this so you can zip tie the hose to the crossover pipe or (I don't an expansion tank) the expansion tank. Put in T connector and cut appropriate amount of hose to connect the T and the expansion tank.
Everything completed. Cap the passenger side PCV fitting on the intake and the plastic tube near the old location of the PCV valve. However, it would be best to cap the lower intake and the blower separately if you have the patience to pull off all those lines.
Note how the line evenly slopes down to expansion tank.
You can use AN fittings/line or put the catch can somewhere else (fender well?) but I chose to do it this way as it's cheap and easy to access.
NOTE: RETAIN ALL PCV items removed. This mod will not pass inspection.
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