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Old 08-13-2017, 12:13 PM
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Evap canister melted

Ok, so as I slowly work my way through eliminating the various emissions system codes my Jeep is throwing, I finally got down to a P0440 - general evap system problem. I hopped under the Jeep this am to do a little diagnostics and found a bit of a problem - see images below. Note, as you can see, the entire evap system is pretty darn new - I bought the Jeep about a month ago, the PO had done quite a bit to it.





Clearly the evap canister had got a bit too close to the muffler, and yes, there is a hole into the core of the canister. My questions are:

1 - is this layout normal? i.e. is the evap canister normally this close to the muffler?

2 - is there anything I can do to protect the canister from the excessive heat from the muffler?

Thanks in advance,

Ian

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Old 08-13-2017, 12:32 PM   #2
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Bolt up a heat shield. Only thing I can think of

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Old 08-14-2017, 07:39 AM   #3
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My canister is about 3 inches from the muffler and looks to be about centered between the muffler and drive shaft.
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Old 08-14-2017, 08:10 AM   #4
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Newer Jeeps have a steel skid around it that doesn't feel terribly strong but is better than nothing. I replaced mine with a Poison Spyder one that's solid as a rock.

This is the first time I'm seeing one melted like that, but was told early on that this was a weak spot prone to getting smashed by rocks so you should shore it up before you have to replace it. I expect the same advice holds true for you.
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Old 08-14-2017, 12:56 PM   #5
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Looks to be an aftermarket muffler and too close to the canister. Is your exhaust stock, or aftermarket?
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Old 08-14-2017, 01:01 PM
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I don't really know. I believe it's aftermarket. There are certainly some issue with it, including how it's hung. I'm going to take it to a speciality muffler shop to be properly looked at.

Re the EVAP canister, I just bought a re-location kit along with the new canister so I'll move the canister above the rear axle, hopefully that'll be far enough away from the muffler to avoid melting again.

Ian

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