Yesterday I was doing some routine service to my new to me stock 2001 XJ. Since I had the valve cover off to replace the gasket, I decided to let it take a dip in my solvent tank and clean it up some. I didn't think the plastic oil fill cap, PCV, and CCV would fair too well in the solvent and decided to pull them out. Yep, both valves came out in pieces. Although I had no issue finding a replacement PCV, the CCV was an entirely different story. Nearest parts house with one in stock was over an hour away. So I started looking for alternatives to burning $30 in fuel and killing 3hrs. Closer inspection of the CCV showed that it was just a tube with a 90* elbow. That is when I got the idea to modify a PCV. Sorry, didn't think to get any pics of the process, but it is pretty straight forward.


1) Starting with about a 1/8" bit, gently drill out the narrow opening on the bottom of the PCV. Gradually step up bit size until you have 1/2" opening.


2) Using a small half round file, clean up the edges of the new opening.


3) Install in the valve cover, reconnect the hoses and happy trails.


Hope this can help someone else in a bind.

 

I may be way off base but I think the 4.0 only uses a CCV in the rear with an open valve to the breather on the front.

 

The PCV - back (small hole)

CCV - front (open)

 

The CCV is in the back with the small hole. The front elbow is just a crankcase vent, not a positive crankcase vent. The CCV acts as a PCV. It's confusing because they're both crankcase vents, but the CCV elbow has a small orifice and has manifold vacuum going to it. Where as the crankcase vent is plumbed to the air cleaner assembly and has a much larger opening.

 

All I know is that everything I found listed the rear most elbow as the PCV, and the one closest to the radiator as a CCV. Just tryin to help folks out that run into the trouble I did. So to clear things up, the rear elbow has the small restrictive hole whereas the front has no restriction at all.

 

Lol, I wasn't trying to be "that guy", but I ended up being that guy anyway, my apologies.

 

No apologies necessary!!! I was just trying to clarify any confusion.

 

I cant find one anywhere near me, so i am thinking of just grabbing a breather filter and putting it in there.

 

look on eBay.. That's where I got mine. Lots on there

 

CCV is a different system from PCV, but they are similar purpose. PCV uses a valve, CCV uses a restrictor, both of them vent crankcase gasses through the valve cover. Our Jeeps use CCV. Autozone might call it a PCV valve but that is just a database error, there is no valve, its an open vent.

If you can find them with the small opening, you can drill one of them out. That is the only difference between the two elbows, one has a restrictor the other doesn't.

 

I took a PVC valve and ground the rolled edge of the metal cup part with a grinder until the bottom of it came out and released the innards; a spring and stopper. Now it is pretty much just an elbow and works perfectly. Took 5 minutes and cost about $5.

 

Like this guy...but emptied out so it is just an elbow. (I used this in conjunction with a grommet in the hole in the valve cover.)



I ground it down right at the bottom where the radius is

 

Dealer has them. They aren't real expensive either. I couldn't find the right part anywhere else. They aren't pcvs.

 

2.6 mm oriface at the rear, to manifold vac. Large free front tube, to the airbox.... It's a "calibrated" vacuum leak I suppose.

 

nobody around had them, so i made a make shift one out of this. works great!

http://www.oreillyauto.com/site/c/de...0572&ppt=C0088