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Old 03-28-2013, 11:36 AM   #1
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Exhaust system question

I noticed after a recent trip to Florida that the left exhaust pipe had contacted the body panel and melted it to the shape of the pipe. I had the dealer check it and was told that I need bolts and donuts replaced. Is that reasonable or should I be looking for more that could cause this?
This is a workhorse chassis.
Thanks for any feed back!
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Old 03-28-2013, 11:57 AM   #2
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Brother-in-law had a similar problem , and had to extend the tail pipe hanger, on his 05 Tiffin, burnt the carpet in one compartment .
Now this is JMHO.
There is a lot of weight involved in the length of pipe and I doubt that the do-nut and bolts at the exhaust manifold are the only things aligning the pipe, Should be hangers at the cat. convertors and mufflers to stop the pipe from contacting the body. Now the pipe may have been damaged/pushed up to contact the body, most likely cause, in that case the pipe would have to be heated to re-align.
If you can't hear an exhaust leak then I don't think replacing the do-nuts will cure your problem, I think a second oppinion ( muffler shop maybe) is in order.
Should have said this first... Welcome to iRV2 .
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Old 03-28-2013, 11:57 AM   #3
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By donuts I assume you mean the rubber hangers that hold the exhaust pipe. It is very common for these to rot out. It is easy to check if you crawl underneath RV and push up on pipe (when cool) and see if the tip moves away from the body. It doesn't have to be done by a dealer, any muffler shop should be able to do it at a cheaper 'per hour' rate than an RV dealer.
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Old 03-28-2013, 07:55 PM   #4
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Thanks for the tips. Could engine mounts be the problem or do they break loose?
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Old 03-28-2013, 08:12 PM   #5
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I doubt that the engine would be loose, most likely an exhaust pipe/muffler hanger or two. You can watch engine as you 'rev' it a few times to see if it moves excessively.
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Old 03-28-2013, 11:37 PM   #6
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Quote:
Originally Posted by BLAdventurer View Post
Thanks for the tips. Could engine mounts be the problem or do they break loose?
The rubber isolater portion of the motor mounts can fail , but the design of the mounts provide a positive metal stop to keep the engine in place, less than a 1/2' of movement at the motor, and when the load comes off the engine settles back to it's normal spot, so the pipe would drop away from the body , limiting contact and damage.
If the mount were bad, on hard acceleration all the engine vibrations would transfere to the frame and it would feel like the whole front of the coach was trying to jump sideways off the road.
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