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Old 03-10-2014, 11:03 AM   #1
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Exhaust Heat inside Engine Compartment

Inside the engine compartment in the area above where the exhaust exits gets extremely hot - hot enough to boil water. Is this okay? Doesn't seem so. Is there supposed to be shield or maybe some insulation between the exhaust/muffler and the sheet metal?
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Old 03-10-2014, 11:15 AM   #2
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All internal combustion engine exhaust, run in the 600 degree + range even hotter under load . Proper heat shielding to combustibles and testing of same is what the manufacturer should be doing.
I know that after 8 hrs on the road , the bed in my coach has heated through very nicely for the cool fall and spring evenings that are common when I'm traveling.
Maybe not so great if I travelled mid summer.
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Old 03-10-2014, 11:16 AM   #3
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You could use some flexible dryer vent to divert cooling air into the area. Sheet metal is a good heat shield, insulation just slows heat penetration, it doesn't prevent it. Make sure exhaust exits beyond RV body.
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Old 03-10-2014, 11:55 AM   #4
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Our engine sits under our bed. The bedroom access has a heat shield installed under the plywood hatch but our mattress does get toasty during the day of travel.

Our muffler sits at the driver side near the rear. There is no sheet metal there just mostly frame metal and the radiator forward and adjacent.

I have not noticed the fiberglass being significantly more than atmospheric temp at the muffler location.
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Old 03-14-2014, 11:12 AM   #5
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Last year someone posted the there coach got so hot in the closet of there DP that it melted his crocs and to go to bed was also a problem. So I took a remote temperature sensor like this one and placed it on the floor in the closet and during the summer the highest that I got was 89deg, come to find out he was missing all the insulation in his motor compartment.
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Old 03-14-2014, 10:28 PM   #6
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Watch your intake temp on your Silver leaf if you have one. It will give you an idea of how hot it is in the compartment if you have an idea of the outside temp.
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Old 03-15-2014, 11:46 AM   #7
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Quote:
Originally Posted by pumper9x9 View Post
Watch your intake temp on your Silver leaf if you have one. It will give you an idea of how hot it is in the compartment if you have an idea of the outside temp.
Usually air filter takes air in directly from outside, not underneath or inside engine compartment. I'm not sure your Silverleaf is going to give an accurate reading of engine area temp.
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