Changing a PCV Valve

[Deleted member 20330]

Is this a complete explanation on changing the PCV valve on a Gen 2 ?

http://www.lincolnsonline.com/tech/00266.html

 

[todd2fst4u]

Those are instructions for a Mark VII. Changing a PCV on a gen 2 can be done with just your hands. It's located on top of the engine behind the spark plugs on the driver's side, close to the firewall. You can pull it out, remove the vacuum line and attach it to the new one, and push the new one back into place.

 

[Deleted member 20330]

Those are instructions for a Mark VII. Changing a PCV on a gen 2 can be done with just your hands. It's located on top of the engine behind the spark plugs on the driver's side, close to the firewall. You can pull it out, remove the vacuum line and attach it to the new one, and push the new one back into place.

todd2fst4u,

That's a relief !

Thanks for the quick reply.

It's going in right now.

 

[dnsherrill]

the new one may come with a small plug..that's to cap the opening you don't use

 

[Deleted member 20330]

Since I had read about fitment issues with Fram, I decided to use the Motorcraft EV111 PCV Valve.

However, the light gray part of the new PCV valve attaches too easily and seems like it could come out under normal driving conditions. The old PCV valve was quite oily - is that normal ? Is it normal for a new part like this to not fit snug ?

When I looked at the old PCV valve, the "-xxxx" characters after EV111 were different from the new one I installed. Is that just a revision change to the correct part number ?

Also, when I moved a wire near the PCV valve, the new plug on the F connector fell down into the engine - where I can't see it. So I just used the plug from the old PCV valve. Is this a problem ?

 

[MooJohn]

Replace the rubber gasket that the PCV plugs in to. It's quick and only $3.

You want Dorman part number 42049, sold at Advance/AutoZone/O'Reilly as a Help!-branded product next to the PCV valves.

I know this gasket fits all 4-valve 4.6 cars and probably the 2v ones as well.

 

[Sapperfire]

The blowby vapors that end up in an engine's crankcase contain moisture as well as combustion byproducts and unburned fuel vapors. The crankcase is sealed to prevent the escape of these gases into the atmosphere, but the vapors must be removed to prevent oil contamination that leads to sludge formation. The positive crankcase ventilation (PCV) system siphons these vapors from the crankcase and routes them into the intake manifold so they can be reburned in the engine.The main component in the PCV system is the PCV valve, which is usually located in the valve cover. A hose connects the PCV valve to the intake manifold. A second hose between the air cleaner and crankcase or other valve cover (V6 or V8 applications) provides fresh air to help flush the vapors out of the crankcase. Some engines have a separate air filter for the PCV breather hose located inside the air cleaner.The PCV valve is a spring-loaded valve with a specific orifice size designed to restrict the amount of air that's siphoned from the crankcase into the intake manifold. This is necessary because air drawn through the valve from the crankcase has a leaning effect on the fuel mixture much the same as a vacuum leak. So air flow through the valve must be controlled within certain limits. At idle, air flow is reduced because little blowby is produced. When the engine is cruising and vacuum is high, airflow through the PCV valve is at a maximum to purge the blowby vapors from the crankcase.It's important to note that PCV valves are sized for specific engine applications. The wrong PCV valve for an application can flow too much or too little air causing driveability problems. Varnish deposits can clog the valve, so replacement for preventative maintenance is recommended (every 50,000 miles usually).Not all engines have PCV valves. Some (like Ford Escort, GM FWD cars with the Quad Four engine, etc.) ventilate the crankcase with a small breather hose and calibrated orifice. There is no spring-loaded PCV valve. On these applications, no maintenance is usually necessary.

 

[Deleted member 20330]

Replace the rubber gasket that the PCV plugs in to. It's quick and only $3.

You want Dorman part number 42049, sold at Advance/AutoZone/O'Reilly as a Help!-branded product next to the PCV valves.

I know this gasket fits all 4-valve 4.6 cars and probably the 2v ones as well.

MooJohn,

And the grommet is what will make the PCV valve fit snugly so it won't come out so easily ?

Is the "Standard Motor Products GV3 PCV Valve Grommet" the same thing ?

http://www.rockauto.com/catalog/raframecatalog.php?carcode=1188558&parttype=11783

 

[MooJohn]

That's not it but RockAuto does sell the grommet - just go to the "Part Number Search" tab and look for 42049 & Manufacturer = Dorman. They're asking $2.25.

I can't figure out how to get a direct link to the product. This is the "more info" page but you can't buy it from there:

http://www.rockauto.com/catalog/moreinfo.php?pk=14829

 

[Deleted member 20330]

I'm not sure this happened, but for my own piece of mind, I'd like to err on the side of caution.

While cleaning the engine bay with Detailer's Pro Engine Degreaser, I knocked the PCV valve out of its grommet with a brush.

I'm not sure if any of the engine degreaser or water I was "misting" (not spraying), over the engine got past the grommet hole.

Palm Beach Accessories recommends changing the oil and oil filter.

I had just changed the oil (synthetic Mobil 1 Extended Performance 5W-30) and oil filter (Mobil 1-210) the day prior to this happening.

The car hasn't been cranked since I cleaned the engine bay.

Is changing the oil and oil filter the right course of action ?

Should the PCV valve be changed ?

Is an engine flush necessary or is the use of synthetic oil enough ?

 

[slowmkviii]

IMO if you were to only have gotten a mist in there run*it.

 

[Deleted member 20330]

After talking to Mobil 1 support, they said changing the oil and filter should be sufficient.

For another $37, it's a small price to pay for peace of mind.

I'll just wipe off the PCV valve thoroughly.

From what I've read, using an engine flush for any reason, is strictly forbidden. This explains why there aren't many companies making it.

On the positive, the engine bay is very clean.

 

[Deleted member 20330]

Replace the rubber gasket that the PCV plugs in to. It's quick and only $3.

You want Dorman part number 42049, sold at Advance/AutoZone/O'Reilly as a Help!-branded product next to the PCV valves.

I know this gasket fits all 4-valve 4.6 cars and probably the 2v ones as well.

I contacted Dorman, but support said they didn't have a grommet for a Gen2.

For the benefit of others, the Ford part # is F6AZ-6A892-BA and costs about $8 from a Ford parts center.

 

[Deleted member 20330]

Is it a problem to pour a few ounces of oil into the crankcase where the PCV valve sits to wash away any remaining residue ?

 

[Right on the Mark]

Is it a problem to pour a few ounces of oil into the crankcase where the PCV valve sits to wash away any remaining residue ?

Just blow in there with air hose.