PCV Valve Part Number??? 2008 GT

[Midlife Crises]

I have catch cans on both the driver's and passenger side, even though the passenger side is the most important side on this engine. The yellow circles are the two catch cans, and the red circle is the PCV valve(brand new last month). These catch cans work and are a must-have for good engine care.

View attachment 116893

Is that a 3 valve ?

 

[08TorchRedShelbyGT500]

Is that a 3 valve ?

A 2008 GT500 is a 4v 5.4L. (See my user name) That's why I said (on this engine). No visual alternator is a dead give away.

 

[Midlife Crises]

A 2008 GT500 is a 4v 5.4L. (See my user name) That's why I said (on this engine). No visual alternator is a dead give away.

So it is a different engine than the one we are discussing, likely with a different PCV system. Where is the original PCV located? Right or left side? With a PCV in place the air and mist can only flow in one direction. Why would there be a catch can on both sides?

 

[08TorchRedShelbyGT500]

So it is a different engine than the one we are discussing, likely with a different PCV system. Where is the original PCV located? Right or left side? With a PCV in place the air and mist can only flow in one direction. Why would there be a catch can on both sides?

I was reflecting on the use of the catch cans (no matter what engine it is). I think you know the rest of your questions.

 

[Midlife Crises]

I was reflecting on the use of the catch cans (no matter what engine it is). I think you know the rest of your questions.

No question you have a beautiful and desirable car. I am not familiar with the 5.4 4 valve PCV system so I wonder if there is some advantage to using a catch can on both sides. What have I missed?

 

[whitmanink]

No question you have a beautiful and desirable car. I am not familiar with the 5.4 4 valve PCV system so I wonder if there is some advantage to using a catch can on both sides. What have I missed?

from my understanding ,
its doing nothing lol

when i had my original 3v apart,
the driver side head was so oil and varnished up..
my passenger side , a nice dull aluminum look still @140,000 miles

 

[saleen37804]

Here is another variation of the engine ventilation system similar to what 07 Boss described. Both valve covers are connect to a single, vented catch can with 3/4” hose. There is no PCV and no connection to the air induction system at all. After I found oil in the intercooler under the blower, this is how I “fixed” it. I have no oil in my intake and my spark plugs stay cleaner, longer. Unless I stain them with obtain booster.

View attachment 114634

Where did you get the fitting for the oil fill neck? I have the exact breather set up as you, but I'm only venting the passenger side from the small 3/8 pcv fitting.

 

[Midlife Crises]

Where did you get the fitting for the oil fill neck? I have the exact breather set up as you, but I'm only venting the passenger side from the small 3/8 pcv fitting.

I ordered that adapter from Summit Racing along with several other aluminum AN fittings.

 

[GlassTop09]

So it is a different engine than the one we are discussing, likely with a different PCV system. Where is the original PCV located? Right or left side? With a PCV in place the air and mist can only flow in one direction. Why would there be a catch can on both sides?

On 5.4L\5.8L SC Modular engines, the PCV system is essentially the same design process, just in opposite directions (inlet is on the DS valve cover, outlet is on the PS valve cover using an external PCV valve--usually a blue colored twist-in valve--that latches into the PS valve cover vs 3V Modular NA engines which is opposite w\ PCV valve located internally in DS valve cover). The metered air is pulled into engine pre-TB & drawn-out outlet on opposite valve cover from inlet thru a PCV valve to control airflow back into intake post-TB.........in the case of the 5.4L\5.8L, this is into the intake section post-TB but before rotor inlet within the SC housing vs the IM plenum post-TB on 3V Modular NA engines.
If a PD SC is installed on a 3V Modular, the 3V Modular SC housing inlet design is copying this same design as noted for all 5.4L\5.8L SC Modulars, just in opposite directions thru the engine crankcases using the existing internal PCV valve in DS valve cover but the exact same process design\criteria.

Hope this helps.

 

[07 Boss]

So let me try and clear this up as there seems to be some confusion. If you are going to keep your PCV system as a closed system, no breathers, you need to put the catch can on the side with the PCV valve. In a normal system closed system the engine opens the valve and draws crank case blowby using manifold vacuum. On the 4.6 it's the driver's side and I guess on the 5.4 it's on the passenger side. Now with that said, once you open up the system to the atmosphere you are no longer operating the system on manifold vacuum but just venting it as pressure builds. This reverses the flow. Without any vacuum, the PCV valve side will never open up and everything flows out of the passenger side.

So, if you're just installing an inline catch can it needs to be on the driver's side for a 4.6.

If you are utilizing breathers and venting to the atmosphere, you need to install it on the passenger side, or both sides if you remove the PCV valve. If you are opening up the system you should remove the PCV valve from the driver's cam cover and use an oil breather cap. This will allow the crankcase to breath a little more freely than just the little 3/8" outlet and you won't get any oil drippage or spray than if you just had the one outlet.

I don't have part numbers but you can look up the filters by style and size on the K&N website. One has a 3/8" bottom and the other is a 5/8". The oil cap breather is from Central Florida Motorsports and has a ball/check valve in it.

side note: if you are running an induction system where there is boost present in the manifold where the PCV line attaches it kind of fubars everything. Under boost, your PCV system may run backwards. See, in a normal NA set up there is always vacuum present in order to flush the crankcase gases as they build up. If you are running a turbo or centri, under boost, the PCV valve can no longer operate and as the pressure builds in the crankcase it will vent out the intake side. With a roots or twin screw you still have vacuum at the PCV connection because the boost is produced after that point. So at the minimum, if you are running a centri or turbo I would definitely get the CFM oil cap breather if you are leaving the PCV system intact. The ball/check valve will allow your PCV system to run as intended and will allow excess crank case pressure to be relieved when there is no vacuum present to open the valve. But I always suggest to those that are running a turbo or centri to just run 3 breathers.

side note 2: If you do decide to run breathers instead of the standard PCV system you need to increase the frequency of oil changes. Breathers do not run as efficiently as the PCV system in remove crank case blow by gases. I do not mean there will be any pressure build up, but you are not introducing clean air to flush the crank case. What happens in this situation is more fuel and contaminants get dissolved into the oil and the viscosity breaks down quicker. But it's a small price to pay for not running that crap back through your engine.

Hope this helps clear up any confusion and answers some questions.

 

[Midlife Crises]

So let me try and clear this up as there seems to be some confusion. If you are going to keep your PCV system as a closed system, no breathers, you need to put the catch can on the side with the PCV valve. In a normal system closed system the engine opens the valve and draws crank case blowby using manifold vacuum. On the 4.6 it's the driver's side and I guess on the 5.4 it's on the passenger side. Now with that said, once you open up the system to the atmosphere you are no longer operating the system on manifold vacuum but just venting it as pressure builds. This reverses the flow. Without any vacuum, the PCV valve side will never open up and everything flows out of the passenger side.

So, if you're just installing an inline catch can it needs to be on the driver's side for a 4.6.

If you are utilizing breathers and venting to the atmosphere, you need to install it on the passenger side, or both sides if you remove the PCV valve. If you are opening up the system you should remove the PCV valve from the driver's cam cover and use an oil breather cap. This will allow the crankcase to breath a little more freely than just the little 3/8" outlet and you won't get any oil drippage or spray than if you just had the one outlet.

I don't have part numbers but you can look up the filters by style and size on the K&N website. One has a 3/8" bottom and the other is a 5/8". The oil cap breather is from Central Florida Motorsports and has a ball/check valve in it.

side note: if you are running an induction system where there is boost present in the manifold where the PCV line attaches it kind of fubars everything. Under boost, your PCV system may run backwards. See, in a normal NA set up there is always vacuum present in order to flush the crankcase gases as they build up. If you are running a turbo or centri, under boost, the PCV valve can no longer operate and as the pressure builds in the crankcase it will vent out the intake side. With a roots or twin screw you still have vacuum at the PCV connection because the boost is produced after that point. So at the minimum, if you are running a centri or turbo I would definitely get the CFM oil cap breather if you are leaving the PCV system intact. The ball/check valve will allow your PCV system to run as intended and will allow excess crank case pressure to be relieved when there is no vacuum present to open the valve. But I always suggest to those that are running a turbo or centri to just run 3 breathers.

side note 2: If you do decide to run breathers instead of the standard PCV system you need to increase the frequency of oil changes. Breathers do not run as efficiently as the PCV system in remove crank case blow by gases. I do not mean there will be any pressure build up, but you are not introducing clean air to flush the crank case. What happens in this situation is more fuel and contaminants get dissolved into the oil and the viscosity breaks down quicker. But it's a small price to pay for not running that crap back through your engine.

Hope this helps clear up any confusion and answers some questions.

I can agree with most all of what you stated, with one exception. Don’t be fooled into believing the air drawn into the right valve cover “on a 3 valve” is perfect. It has passed through the air cleaner so it does not have “chunks” but it is still subject to humidity and in a rain storm you are introducing water into the crankcase.
Open breathers do not force anything into the engine.
Running a full synthetic oil right up close to 100*C for normal driving will go a long way to keeping condensation out of your oil. Fuel contamination boils off before the water does by the way.

 

[Bedouin]

And not all catch cans are created equal in how much oil vapor they trap…there was a great thread in the c6 z06 forums showing a significant captured oil volume btw 10 different catch cans.

 

[07 Boss]

... Fuel contamination boils off before the water does by the way.

Not completely.

Yes, gasoline will eventually evaporate out of motor oil, but it is a slow process that will not fully restore the oil's properties. Because gasoline and motor oil are both petroleum-based hydrocarbons, they are miscible—meaning they dissolve completely into each other. While the lighter, highly volatile components of gasoline will vaporize when the engine gets hot, the heavier chemical chains in the gasoline will remain bonded to the motor oil. This permanently dilutes and ruins the oil's lubricating ability, requiring a complete oil change.

All I'm saying is that the presence of blow by fumes and gas that aren't evacuated with a flow of "fresh" air has more time to dissolve into your oil. This will shorten the life of your oil compared to a flowing PCV system. Folks running breathers should just take note and monitor or change your oil a little more frequently. Can't hurt, only help.

 

[Robert Larimer]

If you are adding a catch can to the 3 valve PCV system it belongs on the drivers side. This places it between the intake manifold plenum and the left valve cover. (The side with the PCV valve built into the valve cover). If you place the catch can on the passenger side valve cover it will do nothing because no air is leaving that side of the crankcase. Fresh air comes into the crankcase through the passenger side valve cover from the clean air duct.

Ford moved the PCV valve to the passenger side on my 3.7 Cyclone and the 5.0 Coyote is the same. Sorry for the confusion.