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-   -   Exhaust already rotted (http://www.ramforumz.com/showthread.php?t=137033)

Inferno10 03-22-2013 12:07 PM

Exhaust already rotted
 
I just picked up my Ram in October, and took it in for a knocking noise that I believe could be an exhaust manifold issue. While its in the shop, they let me know that the rear exhaust is leaking from rot holes in the pipes tight where they go over the axle. Seriously? Rotted exhaust on a 3 year old truck? Thats horse you know what. Now Ill be looking at a hefty bill for a replacement exhaust.

I have owned nothing but Chrysler products since 2001, and one thing that I have never had problems with has been rotted exhausts. My last one had 175k on it when I sold it and the exhaust was fine. I am not happy about this, especially since the truck has 39k on it and its just out of the bumper to bumper warranty.

The dealer also cant find the manifold leak, but the truck has an incessant ticking noise, sounds like a damn diesel running. If these kind of issues keep happening, I dont think Ill have this truck for very long.

Jmac86201 03-22-2013 12:18 PM

i say put a nice aftermarket on there with a lifetime warranty on it. increases performance, looks better, sounds better, and lasts a whole lot longer

snrusnak 03-22-2013 12:22 PM

OEM exhaust on your truck should be stainless steel (409, I believe). I find it VERY hard to believe it's rusted through. It may have surface rust, but should last a long time before really having issues like you are describing. The oem exhaust pipe is actually very good, it is SS, mandrel bent, and properly sized. Something seems off here... My 2010 has 75k miles and the oem exhaust has a light layer of surface rust with no other issues. The tail pipe(section that goes over the axle) looks brand new, not even having surface rust.

Inferno10 03-22-2013 12:27 PM

The dealer plugged the exhaust to try and find the mainifold leaks and said there are leaks in the pipes right where they go over the axle. Now mind you, the original owner chopped the muffler out and had a Flowmaster popped in there, but he said the leaks are not where the muffler or extensions to make it fit are. Im gonna ask him if I can see it up on the lift when I pick it up.

Inferno10 03-22-2013 12:28 PM

BTW, i dont understand how they would be able to find manifold leaks by plugging the exhaust if there are leaks already before the plugs. If these guys cant figure out the knocking noise, it will go to a different dealer.

snrusnak 03-22-2013 12:41 PM

sounds like the rotted exhaust is aftermarket, not oem SS.

Inferno10 03-22-2013 12:54 PM

Its factory with an aftermarket muffler in place of the original. Pretty sure I already stated that. Im not new to cars, mechanics, etc. Like I said, Ill look at it on the lift and see what these leaks are all about.

snrusnak 03-22-2013 12:57 PM

I understand, but I'd bet the leak/rotting is from the aftermarket muffler. The muffler connects to the tail pipe just before the axle, they probably used mild steel wire/rod when welding and the aftermarket muffler is probably mild steel. I bet the issue is at that location, not with the oem SS pipe. For SS pipe to rust a hole it takes a good while, even in northern conditions(salt).

Inferno10 03-22-2013 01:01 PM

Thats why i want to look and see what hes talking about, from his description, the leak is after the extensions that were welded in behind the actual muffler. If its the extensions leaking, it will be going back to the dealer I bought it from to have that fixed, as Ive had issues with that since day 1.

CdnoilRAM 03-22-2013 01:42 PM

I would love to see a picture of this. I too have a hard time believing that the stainless section has rusted out in such a short time. As Sean pointed out, using carbon steel rod/wire on stainless is a very bad thing for stainless. If that's the case it's quite possible that moisture condensed inside the elbow before the axle and this has caused the rotting.

Once stainless has been contaminated with carbon steel it's more prone to rust then the carbon steel itself. We see it all the time with cheap shops that put out stainless piping for our heavy oil plant, especially since we're a sour service facility.


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