Question about 2005 Chrysler 300C Base

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I have an exhaust leak right behind the expansion joint in my 2005 Chrysler, what can I do?

I have an exhaust leak right behind the expansion joint? The pipe that comes out of that joint is still attached and in decent shape but the seal or whatever was there before has come off leaving me with a cool sounding but unwanted rumble. Any ideas on how to fix this without replacing the whole pipe?

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  • Brett Becklin
    Brett Becklin Apr 22, 2015

    Here's the spot I'm talking about

  • Jason Larocque
    Jason Larocque Apr 22, 2015

    looks are deceiving but it looks like it could be welded the way it sits cleaning up the rust to get fresh bare metal if you do attempt or have someone attempt to weld disconnect neg battery cable so you don't surge computer with welder leading to a new problem but that is my suggestion to fix with out replacing the entire pipe and that looks like manifold back

  • Jason Larocque
    Jason Larocque Apr 22, 2015

    thats drivers side ? correct ?

  • Brett Becklin
    Brett Becklin Apr 22, 2015

    Yes. Just underneath the drivers seat

  • Brett Becklin
    Brett Becklin Apr 22, 2015

    Little bit closer look

  • Jason Larocque
    Jason Larocque Apr 22, 2015

    is there an identical lip on the cat side like the one i see on the pipe side ?

  • Jason Larocque
    Jason Larocque Apr 22, 2015

    it looks like where ever your from you get snow does your d.o.t. use the liquid to treat your roads ?

  • Jason Larocque
    Jason Larocque Apr 22, 2015

    if there is an identical lip on other side it looks like you could use a turbo or diesel pipe style clamp but trying to look closer at it it looks like that lip was once part of that canister and pulled back maybe 1/2 inch ?

  • Jason Larocque
    Jason Larocque Apr 23, 2015

    i think if thats the case (it broke away) the only fix without replacement is welding

  • Brett Becklin
    Brett Becklin Apr 23, 2015

    I live in Minnesota and they salt the roads.. Underbody rust is almost unavoidable without spray lining the under side of the car.

  • Jason Larocque
    Jason Larocque Apr 23, 2015

    i understand completely i live in ct and they use a chemical to treat our roads i go to the car wash weekly to do under carriage

  • Brett Becklin
    Brett Becklin Apr 23, 2015

    This is the other side of the dual exhaust.. So I guess what it's "suppose" to look like although this one looks like it could fail at any moment too

  • Brett Becklin
    Brett Becklin Apr 23, 2015

    This is the reverse side of the leak.

  • Brett Becklin
    Brett Becklin Apr 23, 2015

    I buy the unlimited wash package and usually use it every other day. Clean car is a happy car.

  • Brett Becklin
    Brett Becklin Apr 23, 2015

    So as far as replacing that part goes, what exactly do I buy? Can I buy any expansion joint? (Provided that it's the right size) and use some band clamps or something?

  • Jason Larocque
    Jason Larocque Apr 23, 2015

    you may be able to cut expansion joint out and replace with a flex type pipe which is just flexible pipe wrapped in steel braids which won't be as large in diameter but would be considerably less than buying which looks like from the manifold back to next union would cut pipe in front of expansion pipe about 3/4 of an inch then about 1/2 inch behind that lip on the pipe that pulled out make your markings then measure overall what would be cut out before making any cuts i would see what lengths are available and diameter of car pipe i.e. 2 inch or 2 1/2 inch you either want the new part to slide in or over the pipe on vehicle ideally over front pipe to reduce risk of leaking but either way if it is clamped properly and would recommend band clamps they tend to seal a better area and likely hood of leaking is less as it will conform to the pipe

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  • Chrysler Master
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If what you say is correct about ware the leak is then its likely the gasket at the back of the cat witch isn't expensive or that hard to replace .
This vehicle is a 2005 witch leads me to belive that the exhuast system must be moveing not mounted correctly something missing or rusted off in the rear of the system .
Look at it and if in question do everything from the cat back its 10 years old and if you got 10 years you did good .
You can mess with it but you will have to replace it sooner rather then later .

Posted on Apr 23, 2015

Testimonial: "What parts do I buy to fix this? I agree, the rest of the system will no doubt need to be re-done in the near future.. But if I wanted to "bandaid" this for now, would i buy an expansion joint and band clamps?"

  • Brett Becklin
    Brett Becklin Apr 23, 2015

    Meant to comment, not do a testimonial. My apologies.

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  • Chrysler Expert
  • 243 Answers

If your handy with a welder you can piece in a section of same diameter pipe or i.d. over o.d. and clamp it recommend band clamps they are like 4 inches wide and have a better seal capability

Posted on Apr 22, 2015

Testimonial: "Jason is very helpful. Responds promptly to questions and helps you to work through the options. Highly recommend."

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