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Old 05-09-2013, 11:23 PM   #1
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National RV Owners Club
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Location: Costa Mesa, CA
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Heat from engine compartment into bedroom

2001 National Tradewinds 100 k miles. New to me. I experienced hi heat in bedroom when I brought the coach home. Any product information to re insulate the engine compartment and maybe wrap the exhaust pipe and muffler?

We are moving in for 3 months and this should be fixed before I leave. Thanks in advance.


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Old 05-09-2013, 11:34 PM   #2
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I'm sure someone will chime in with ideas and info on insulaton.
A couple of questions .
Do you have a bedroom slide ? Is you coach side radiator or rear radiator ?
How many miles did you drive before the heat became noticable ?
Any sign of anything in the way of insulation being removed from the engine compartment ?
Answers will give others a better idea of how to help.

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Old 05-10-2013, 12:04 AM   #3
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Both motorhomes we have had get warm in the bedroom. I don't think their is much you can do about it. You have a massive engine that is producing a lot of heat.
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Old 05-10-2013, 12:22 AM   #4
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Small bedroom slide. Came out of oYuma on a 80 degree day into San Diego wit ac s running . Bedroom was hot! (Princess will not like that!) current insulation looks slim. New muffler just installed and it is not wrapped. I would like to find a supply of insulation to but on wall of engine compartment and the correct product to wrap the exhaust pipe.
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Old 05-11-2013, 04:59 PM   #5
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Just know that if you wrap the exhaust, the pipe/muffler/whatever will have a shorter life. Header-wrap on a mild-steel exhaust header (gas engine) will often kill the header in just a couple of years.

I would think in terms of exhaust heat shield(s) instead of wrap, and increasing air flow in that area.

Rear radiators can get an oily film from engine blow-by, which then starts holding dust and dirt. That will cut down on air flow through the engine compartment, which would increase temps. You might search the forums for info on inspecting and cleaning radiators.
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Old 05-11-2013, 05:05 PM   #6
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Make sure you have the best possible airflow past engine when on the road. If you have a solid mudflap, drill some 2" holes regularly spaced to allow air to flow out the bottom & past the air dam created by the mudflap (the holes won't impede the rock-detering function of the flap). If you have a hanging flap or the plastic hair kind then this is already accomplished.
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Old 05-11-2013, 10:54 PM   #7
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I recently re-insulated my engine compartment while the engine was out. I think it would be a majorly difficult job working around the engine. After doing a lot of research I ended up using this Foam Barrier Composite with Facing - dB Engineering - Products

The original insulation facing was coming off, I found a few pieces stuck in the radiator fins.

And a picture of the new insulation, new motor, getting ready for a test run with a bucket of water before I put the radiator in.
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Old 05-11-2013, 11:22 PM   #8
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Here is more input regarding insulation on exhaust system
Insulation on Exhaust Manifold/Turbo Charger
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Old 05-12-2013, 08:48 PM   #9
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You should have not problem insulating under the bed, if your bed lifts up like mine. We haven't experienced any heat problems in the bedroom when running, so I'm not sure why yours is doing it.
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Old 05-13-2013, 05:22 PM   #10
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My searches on google came up with the ATP company quoted n a different thread in 09. Best news is that the company is 10 miles from my brick and mortar home so I am goping to have them handle the problem. Thanks for all of the help on this thread. I'll report back as we begin the vagabond life starting on June 2nd.
Tim 2001 National Tradewinds LTC...CAT 330 Turbo, Allison 6 ...looking for a toad

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