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bluie5's avatar
bluie5
Explorer
Jul 11, 2016

Extremely hot exhaust pipe

I was on my way to the lake while towing my trailer and had items in the bed of the truck. The exhaust pipe that runs over the rear axle and under the truck bed was so hot when we unloaded the truck that it melted the bag that our screen house was in. All this heat went through the bed floor, through my rubber bed mat and melted the bag that was on the bed mat. The bed mat was not damaged at all.

I have a 2011 Ram 2500 with the 6.7 Cummins. I never had any dash lights come on and all my temp gauges were not out of the ordinary. Truck has 77,000 miles on it and I just sunk about 2 grand in the weak front end and hate to have to put a lot more now into the engine or exhaust system.

On the way home I made sure that nothing was put in that spot on the bed floor but I could smell that the rubber bed mat was warm when we got home.

What could be causing all this heat? We are leaving in a week for Washington DC and I need to either get this fixed or find a new truck.

Thanks in advance for your help.

18 Replies

  • Do you have a EGT gauge? If not you should get one and don't let it get over 1300 degrees.
  • I hope that's all it is. I didn't think that regen would heat it up like that as it has never been that hot before. I was worried about egr coolers and that kind of expensive stuff.
  • There is exhaust pipe wrap that you can buy at a local auto parts store.

    You wrap it around the section of exhaust tubing, then place a hose clamp on each end, so it will not un-ravel. You do not want to coat more than required of the exhaust system, as it will dissipate a lot of heat where not insulated.

    I had to wrap about 12" of the exhaust pipe on a class C that I owned a while back. It was where the exhaust passed close to the doghouse and near the drivers feet.

    Good luck,

    Fred.
  • On the Ford Diesels they warn you to keep the openings near the tip of the exhaust pipe open to prevent overheating.
  • Maybe you have an exhaust leak in the pipe that goes over the axle. I would think it would be a minor repair. Or maybe there is some heat shielding that came loose.