So is there a need for a catch can on our motors??? just wondering thanks for the replies

 

I don't think so. No one else has one haha. Why you're getting oil in your intake manifold, I don't know.

 

Every little bit helps to cut down oil ingestion into the motor combustion chambers....imo

On my SC'd HD I use one with a passive check valve( like a Krank Vent). Helps keep the oil out of the intercooler...and the check valve keeps the oil in the can

 

Not alot of the NA owners are usually worried about this but you'd be surprised to see what's going on...part of the reason some TB's get so god awful cruddy

 

Im n/a. Like I said I was doing a few things and there was a good coating of oil on the backside of the throttle body and going down the intake.

I got a good price on 2 of them I would just need to figure out if I do in fact need two and also how and where to run them! thanks again

 

What we call a PCV is a check valve that prevents a backfire from igniting the fumes in the oil pan. I would think that would be needed on any engine. But maybe the orifice will do the job.

Modern engines have low tension piston rings for improved fuel economy that might pass oil if you drive aggressively.

 

 

Thanks 😀😄

 

So all that jargon and no one can say explicitly if it's worth it or even remotely appropriate to put a catch tank on a 5.4.

 

Check out RX Performance Products. I think they make a vehicle specific system for the Ford. They are not cheap, but the cheap cans don't catch much. The RX cans catch almost 100% of the blow by products. Do some research into the different brands available as well as independent tests.
My wife has a Chevy 1500 that I just ordered a RX can for. It was $130.00, but from research, it works. You can get cans on E Bay for $30.00, but you might just as well put two barbs into an empty coffee can for all the good they do. Others are selling water separators that are like the things you see on air compressors. They will catch some, but most gets by. You get what you pay for. Does a Ford really need one, that I don't know.

 

hey, not sure if there's still a discussion for this, but I have a 5.4 3V in my SD, and since most of the questions I have about it, direct me to this F-150 forum, I thought I'd make my first contribution. Generally speaking, what I read from others is well thought out and squally from the mouths of FoMoCo stealer techs, but in this particular instance, it seems like there is some confusion from shade tree mechanics like myself without a good understanding of what a catch can, or a PCV valve are for, as well as whether our engines have or need either. So, with the pistons pumping up with the exhaust stroke, the exhaust valve opens and expels the gasses. On the compression stroke or even the intake stroke somewhat, a pressure buildup in the crankcase is created, which is actually necessary for the oil to be pumped into the oil pump and to be circulated through the engine. Occasionally, if the engine oil is too low, or too high, an excess of pressure is created and needs to be removed from the lower end of the engine. As the top end is designed to pump air in as well as out, it only makes sense that this would be a reasonable place to vent this excess pressure to be sent to be expelled through the exhaust manifolds on the exhaust stroke. When the Pistons are moving up, a vacuum can be created sucking air into the seals or from the intake through the PCV valve, which is why it works as a check valve as well. Now, with the spinning crank flailing at thousands of RPMs with large weights almost acting as mini-sails creating a mist or vapor in the crankcase, some of that oil mist will inevitably make its way into the intake along with the excess crankcase pressure. This happens in EVERY engine, from lawn mower to diesels to plane to ocean liner engines, it's just something that happens in internal combustion engines, it's how they work. This oil most can and usually will, build up on anything past the point where the PCV vapors are introduced in the intake, and will cook onto the MAF sensor, intake manifold, intake runners, what have you, including the intake valves and piston crowns and rings. This carbon is the hardest element on earth and is what diamonds come from if that's any indication. Is will wear out can loves, cylinders, bearings, all sorts of stuff, so enter the catch can. What it does is basically work like a water separator for an air line but instead of separating water, it separates the oil most from the crankcase air entering the engine, which is a good thing because we don't care about air getting recycled, it's not going to harm anything other than a little power from the engine being affected, but the oil and carbon it turns into inevitably, will. Lastly, the fixed tube on the pass side of the engine is a vacuum thing that connects to the evap purge pump. The PCV valve is grey and on the drivers side, and is replaceable because PCV valves do indeed get clogged up and stop working, that's why they're shaken to see if they're working or not. I hope that clears up the PCV valve, and catch can issue, it has nothing to do with supercharger a, although those engines also have PCV valves and they NEVER change sirection as one member mentioned, because that would force air into the lower end of the engine, and blow out all of the seals, some gaskets, reverse-hydro lock the motor with air, possibly, and for sure stop the oil pump from working and destroy the engine. Hope you all are able to understand how this system works a little better now, and does a bit more research into catch cans, which are definitely gaining popularity as of late with all of the direct inject engines out there that will basically ultimately fail without them, but are not installed by virtually ANY automobile manufacturer.