All,
While putting my motor back together while doing the head gaskets, I noticed that the rubber connectors that go on the back of each cylinder head were cracked. I did research on what part to get, comparing auto-store parts to the dealer parts (which can be ordered online as well), and wanted to share what I found, part #'s, what you get, etc.
A good reference thread I used for into would be here - http://www.jeepforum.com/forum/f310...-things-back-motor-head-vacuum-lines-1119789/
I hope I can expand upon some of the great info I found while searching.
Mainly - I hope you'll know what to order, and exactly what each part number contains.
The tubes/black cylindrical devices on the back of each cylinder head are the crankcase breathers. The "breather tube" assembly is part of the CVV (crankcase vent valve) system. It is basically tubes from each head, into a t-fitting, and then goes into the intake plenum.
From what I can tell, there are two version of this on the WJ 4.7 - I'm not sure if/when any changes were made, but here's what I know:
1.) Some versions have the plastic breathers screwed straight into the cylinder head. The replacements often only "push" in. The breathers in this case appear to be vertically mounted. (I'm speaking from images found during web searches, so if my info is wrong let me know!)
2.) My WJ, a 2004, had metal fittings that screwed into the heads. It then had two rubber elbows (one on each fitting) that went into the breathers. The breathers were oriented horizontally on the tube.
The problems I have heard of, or experienced, are as follows:
1.) The vertically mounted breathers break off or crack. - If you have this setup, you probably only need the breathers assuming the tube itself and any elbows are in good shape.
2.) The elbows dry rot/crack/break. - If you have the style with the elbows and they are cracked/broken, get the assembly only as it will come with the elbows as well as new breathers.
Here is my case, and what I found when searching for parts:
Upon disassembly, I found the rubber elbows on the breather tube ends were cracked:
I first hit up the local parts store, and found the Dorman "Help!" 46025 - but it was $12.99 each. Amazon is similar in price: http://www.amazon.com/Dorman-46025-...8&qid=1352948390&sr=8-2&keywords=dorman+46025
I then did some research and found for $21-$24 on various Mopar parts sites, I could get a breather tube assembly. But, the images were somewhat lacking, just drawings from diagrams, so I was slightly unsure what would be included
I ended up getting the breather tube assembly and two breathers - if you get the breather tube assembly, it will come assembled with the elbows as well as two breathers - so no need to order the extra two breathers
Breather Tube and Part # - 53031667AC - $21-24 msrp
Breathers and Part # - 53030850AB - $3.75 msrp
Again, you don't need the breathers seperate if you get the assembly. Since I wasn't sure what would be included, I ended up getting both. I found the tube had the elbows I needed, and two breathers, all for less than the Dorman elbows (which feel of lesser quality).
A good point to know - my local dealer quoted me $40 for the breather tube assembly. I thanked them on the phone and said I planned to order, as that was way to expensive. Before I could hang up, they proposed a new price of $24 - so, it pays to know and haggle the parts counter.
Here's some more images of the breather tube assembly:
Note - the breathers are installed just after the elbows on this assembly.
Old tube next to the new tube
Note: The elbows from the OEM part are somewhat rigid. The Dorman ones are very flexible - which raised the concern in my eyes of it kinking. The lower price of the OEM assembly vs 2 Dorman elbows also helped sway the decision!
While putting my motor back together while doing the head gaskets, I noticed that the rubber connectors that go on the back of each cylinder head were cracked. I did research on what part to get, comparing auto-store parts to the dealer parts (which can be ordered online as well), and wanted to share what I found, part #'s, what you get, etc.
A good reference thread I used for into would be here - http://www.jeepforum.com/forum/f310...-things-back-motor-head-vacuum-lines-1119789/
I hope I can expand upon some of the great info I found while searching.
Mainly - I hope you'll know what to order, and exactly what each part number contains.
The tubes/black cylindrical devices on the back of each cylinder head are the crankcase breathers. The "breather tube" assembly is part of the CVV (crankcase vent valve) system. It is basically tubes from each head, into a t-fitting, and then goes into the intake plenum.
From what I can tell, there are two version of this on the WJ 4.7 - I'm not sure if/when any changes were made, but here's what I know:
1.) Some versions have the plastic breathers screwed straight into the cylinder head. The replacements often only "push" in. The breathers in this case appear to be vertically mounted. (I'm speaking from images found during web searches, so if my info is wrong let me know!)
2.) My WJ, a 2004, had metal fittings that screwed into the heads. It then had two rubber elbows (one on each fitting) that went into the breathers. The breathers were oriented horizontally on the tube.
The problems I have heard of, or experienced, are as follows:
1.) The vertically mounted breathers break off or crack. - If you have this setup, you probably only need the breathers assuming the tube itself and any elbows are in good shape.
2.) The elbows dry rot/crack/break. - If you have the style with the elbows and they are cracked/broken, get the assembly only as it will come with the elbows as well as new breathers.
Here is my case, and what I found when searching for parts:
Upon disassembly, I found the rubber elbows on the breather tube ends were cracked:
I first hit up the local parts store, and found the Dorman "Help!" 46025 - but it was $12.99 each. Amazon is similar in price: http://www.amazon.com/Dorman-46025-...8&qid=1352948390&sr=8-2&keywords=dorman+46025
I then did some research and found for $21-$24 on various Mopar parts sites, I could get a breather tube assembly. But, the images were somewhat lacking, just drawings from diagrams, so I was slightly unsure what would be included
I ended up getting the breather tube assembly and two breathers - if you get the breather tube assembly, it will come assembled with the elbows as well as two breathers - so no need to order the extra two breathers
Breather Tube and Part # - 53031667AC - $21-24 msrp
Breathers and Part # - 53030850AB - $3.75 msrp
Again, you don't need the breathers seperate if you get the assembly. Since I wasn't sure what would be included, I ended up getting both. I found the tube had the elbows I needed, and two breathers, all for less than the Dorman elbows (which feel of lesser quality).
A good point to know - my local dealer quoted me $40 for the breather tube assembly. I thanked them on the phone and said I planned to order, as that was way to expensive. Before I could hang up, they proposed a new price of $24 - so, it pays to know and haggle the parts counter.
Here's some more images of the breather tube assembly:
Note - the breathers are installed just after the elbows on this assembly.
Old tube next to the new tube
Note: The elbows from the OEM part are somewhat rigid. The Dorman ones are very flexible - which raised the concern in my eyes of it kinking. The lower price of the OEM assembly vs 2 Dorman elbows also helped sway the decision!