05 Wk 5.7 dripping oil on catalytic converter - Jeep Garage - Jeep Forum

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Old 04-24-2016, 02:40 PM
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05 Wk 5.7 dripping oil on catalytic converter

My 2005 Is dripping oil I think. It's Burning off on my exhaust and smelling in my Ac. It is leaking where the two headers meet for the catalytic converter. I took a look at it it looks like it's on the transmission too. Process of finding the leak? Please and thank you ?

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Old 04-24-2016, 04:13 PM
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Re: 05 Wk 5.7 dripping oil on catalytic converter

Mine is leaking there also. I do not believe it is oil. Could just be water from condensation....
2005 5.7
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Old 04-24-2016, 05:59 PM
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Re: 05 Wk 5.7 dripping oil on catalytic converter

I used to have a 5.7 WK and one of the weak points of that rig is the transmission cooler lines. They are combo rubber/hard lines. Where the rubber transitions to metal (and vice versa) always start leaking over time. Look at your lines and if they look shiny or wet at the transition points then that is likely your culprit. On my 05, I had to replace both by 75k miles because they leaked.
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Old 04-24-2016, 06:14 PM
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Re: 05 Wk 5.7 dripping oil on catalytic converter

Quote:
Originally Posted by crombenevolant View Post
I used to have a 5.7 WK and one of the weak points of that rig is the transmission cooler lines. They are combo rubber/hard lines. Where the rubber transitions to metal (and vice versa) always start leaking over time. Look at your lines and if they look shiny or wet at the transition points then that is likely your culprit. On my 05, I had to replace both by 75k miles because they leaked.


My AC lines are making condensation on them they are draining what believes on top of the transmission.
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Old 04-24-2016, 08:12 PM
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Re: 05 Wk 5.7 dripping oil on catalytic converter

OkAy so I jacked up the truck and looked under the truck seems one bolt is leaking oil. It's where the transmission meets the back of the engine
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Old 04-24-2016, 09:47 PM
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Re: 05 Wk 5.7 dripping oil on catalytic converter

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Originally Posted by jacobscottv View Post
OkAy so I jacked up the truck and looked under the truck seems one bolt is leaking oil. It's where the transmission meets the back of the engine
That's not good. Is it for sure oil (black), vs trans fluid (reddish)? If so, then it is likely a rear main seal. It's one of those things that the part only costs a few bucks, but to put it in you have to drop the transfer case and the transmission to get to it. It's a big job and not necessarily cheap.
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Old 04-24-2016, 09:58 PM
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Re: 05 Wk 5.7 dripping oil on catalytic converter

I take it back, looking at your picture more closely. I am pretty sure that is the transmission oil pan, and the leaky bolt is at the connection to the transfer case. That would point to either a leaky transmission seal (red fluid), or a transfer case seal (black gear oil). Both would be easier (and cheaper) to fix than a rear main....
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Old 04-25-2016, 07:03 PM
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Re: 05 Wk 5.7 dripping oil on catalytic converter

that was pretty cool , i think you saved him alot of money...those leaks are a pain because it starts to blow all over when driving
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Old 04-26-2016, 10:40 AM
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Re: 05 Wk 5.7 dripping oil on catalytic converter

Looking at the picture, it seems like the original assessment was correct -

The transmission does not have a drain plug, so that must be the oil pan we are looking at - also you can see the crossmember in the picture.
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Old 04-27-2016, 07:03 PM
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Re: 05 Wk 5.7 dripping oil on catalytic converter

Quote:
Originally Posted by crombenevolant View Post
I take it back, looking at your picture more closely. I am pretty sure that is the transmission oil pan, and the leaky bolt is at the connection to the transfer case. That would point to either a leaky transmission seal (red fluid), or a transfer case seal (black gear oil). Both would be easier (and cheaper) to fix than a rear main....


It's motor oil I sprayed it down with brake cleaner, the oil the bottom two bolts came back a day later.

---------- Post added at 11:03 PM ---------- Previous post was at 11:03 PM ----------

Quote:
Originally Posted by dr.lee.baugh View Post
Looking at the picture, it seems like the original assessment was correct -

The transmission does not have a drain plug, so that must be the oil pan we are looking at - also you can see the crossmember in the picture.


It's motor oil where the block meets the tranny. It's 4x4
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Old 05-05-2016, 09:23 PM
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Re: 05 Wk 5.7 dripping oil on catalytic converter

Rear main seal 700.00 later
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Old 05-05-2016, 09:28 PM
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Re: 05 Wk 5.7 dripping oil on catalytic converter

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Originally Posted by jacobscottv View Post
Rear main seal 700.00 later
While it sucks, that is not a horrible price for a rear main.
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