CAC TO EGR HOSE...BURST

DarbyWalters · **Posted:** Fri Dec 04, 2009 9:27 pm

Well at 74,000+ miles my driver's side CAC hose split 4" while on the highway. No power but plenty of black smoke so I knew it wasn't a fuel delivery problem. Found a hose at a local dealer and replace in 10 minutes. Knew what to check and what was suspect due to the many post in this section...Thanx!

geordi · **Posted:** Fri Dec 04, 2009 11:24 pm

Happy to help! It would seem like the 70k mark is about the lifespan of the factory hoses, as I'm at 72k and just discovered that I had the same hose go. I only figured it out a couple weeks ago, but I think it was go-ing for several months before I really poked at it.

I'll post up a pic of my solution, which might be helpful for anyone with an Industrial Hose retailer nearby... Saves MUCH money over the dealer's bad hoses!

Diggerfreek · **Posted:** Fri Dec 04, 2009 11:30 pm

Sounds about right. I replaced the CAC hose on my friends 05 at around 75K

mikey1273 · **Posted:** Sat Dec 05, 2009 1:07 am

I was checking mine out when I installed the provent. my intercooler to intake hose looks good and the turbo to intercooler hose looks good at first look too. but it has a film of oil all over the underside. I felt all around it but I can't find any holes or splits. I can't help but think that's not good and it will fail soon.

geordi · **Posted:** Sat Dec 05, 2009 1:49 am

mikey1273 wrote:

I was checking mine out when I installed the provent. my intercooler to intake hose looks good and the turbo to intercooler hose looks good at first look too. but it has a film of oil all over the underside. I felt all around it but I can't find any holes or splits. I can't help but think that's not good and it will fail soon.

Oil on the outside of the hoses? Yep... You probably have a split somewhere. I couldn't find mine until I pulled the hose out, and it looked like I had pulled a razorblade along the inside 'liner' of the CAC-to-intake hose. The cut was perfectly straight and smooth... But the outside split had the rope webbing poking out. Obviously the oil had been attacking it for quite some time.

I had oil on the outside of that hose for a VERY long time, possibly an indication of oil weeping through the rubber as it degraded. Kinda like a pair of Nitrile or Latex gloves will expand and get porous with any contact with diesel fuel.

mikey1273 · **Posted:** Sat Dec 05, 2009 9:45 am

now I guess I have to take it off and check it out. Dam I only have 42,000 miles

DarbyWalters · **Posted:** Sat Dec 05, 2009 1:01 pm

The thin layer of oil film on the outside of the tubes is a "hint" of what is going on inside the tubes. The film is engine oil/dieselfuel and seems to destroy the tube from the inside out which makes sense. I was going to do some stainless tubing for both with silicone ends in the spring. I hope the top hose makes it another 5-6K.

The kool part is with the info here I knew that it was not air in the fuel...or the dreaded limp mode...or EGR valve. When I went to the dealer to get the hose, the service manager wanted to "hook me up" with an OBDII scan to see the code...of course it was not free...$85.00. I told him that I was 99% sure it was the CAC to Engine Block intercooler hose and did not need the "Scan" or "Inspection". I got the tube and replaced it with the tools I had in my Jeep...about 10 minutes...and drove off from the Parts Parking Lot. Very Satisfying!!!

mikey1273 · **Posted:** Sat Dec 05, 2009 3:27 pm

I will have to keep checking mine for farther damage from oil. I don't think I have lost a noticeable amount of boost. When I find a hole or notice loss of boost I guess I will have to get a replacement. The good thing is I have a provent now so the CCV is not dumping any oil there now.

nursecosmo · **Posted:** Sun Dec 06, 2009 8:56 am

When it finally splits, you will definitely know it.

CAC TO EGR HOSE...BURST

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