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The RVer's Open Forum / TECHNICAL RV HELP / Dog House gets Hot

Richard
User ID: 0624334 Aug 29th 10:03 PM
I have a '96 Class C Jamboree built on a Ford E-350 chassis with a 460 V8 engine. In the summer months, the dog house on the driver's side gets very hot while the passenger side is OK. Where can I get some of the foil backed insulation to add to the factory installed insulation. The factory material is about one-half inch thich and I think I need about an inch to stop the heat transfer. More importantly, if I can find the insulation, how do I attach it to the existing insulation? Is there a glue that wiii stand the temperature of the engine manifolds?

TXiceman
User ID: 7956543 Aug 30th 9:59 AM
Wwe had the floor and engine heat problem on our 1999 E-450 SD Minie Winnie. There was no insulation in the floor and only a thin heat shield on the engine cover. I ordered a 3/8" thick foil backed fiber insulation from J.C.Whitney and there high temperature spray adhesive along with the foil tape to seal the edges. Been on for over 2 years now and doing fine. Cured the heat problems.

You can get to them at www.jcwhitney.com.

Ken W

Mike
Moderator
User ID: 1181464 Aug 30th 10:52 AM
Richard,

This is a problem shared with the Chevy 454s as well. Simply adding the extra insulation to the underside of the dog house isn't necessarily going to help your situation as the heat is going to be reflected back to the engine.

The problem with the 454s was the lack of a deflector to move the hot air out from under the dog house on the right side. One was installed on the drivers side but not on the passenger side.

This may be the problem with your rig as well and you may have to figure a way to get the hot air out so it doesn't overheat the doghouse cover.

I have a friend with an older Class C built on a Dodge chassis who had the same problem. The temperatures got so high that the carpeting on the right side of his doghouse actually melted!

Installing an air deflector and extra insulation cured the problem.

Mike

Richard
User ID: 0624334 Aug 30th 7:11 PM
Thanks for the quick replies. I will run all these options to ground and now believe I can "fix" it.

KOG
User ID: 9593383 Sep 3rd 6:42 PM
No need to fabricate the shield. It's about $17 at your Chevy dealer. I have a new one sitting in my shop to be installed before we travel again.

Jim L
User ID: 0547294 Nov 8th 7:56 PM
Mike:

Could you please give us the part number of this shield once again? I can't seem to get your page to come up. I ordered it, but the parts man lost the order and the number!! Please help!

Mike
Moderator
User ID: 9405543 Nov 8th 11:32 PM
Jim,

The part number shown in my manual for the "right hand engine heat splash shield" is 15983041. Be sure to ask if it will fit your MH.

It became standard equipment on 7/15/93, VIN #321432.

As this thread is so old I kinda forgot about the heat shield part of it and deleted the page some time back to make room for something else.

Mike

dave costa
User ID: 2052144 Nov 9th 9:41 AM
Mike... I bought one and installed it. Works great. I have noticed that while driving in the city 35-45 back roads that the engine temp goes down and then when stopped would go up alittle. Then drive again and it goes down. Works like a regular car. This was not happening before. Thanks again

Warren Nelson
User ID: 1613614 Jul 10th 7:19 AM
McMaster-carr has foil faced thermal acoustic foam with Pressure sensitive adhesive backing. Not all foams are equal. The Mcmaster foil is the same product many of the truck manufacturers use.

Eric
User ID: 1293074 Feb 15th 11:02 PM
A long time ago, we had a 78 Pace arrow with the 440 dodge engine and it had a problem with heat on the whole doghouse. Dad fixed this with flexible tubing from the front grille to the top area of the engine. this created a draft of cool air to the doghouse area and never had cracked sparkplugs or bad wires. Also we (as kids) could finally sit on the doghouse while we were going down the road and it was never hot again. so just run some foil ducts up to the engine compartment and that will solve it.

robert
User ID: 0087674 Aug 26th 5:44 AM
We have a 1990 Windjammer with a 454 class A, I used a section of alum. It works great, Liquid nailed it on the engine hump, It hangs down a tad, But reflects the heat just great,,,,,

Ernie Nunez
User ID: 8868883 Jan 31st 7:22 PM
Robert,

Can you elaborate more on the on the fix to reflect the heat. Maybe a diagram, my e-mail address is moocat@earthlink.net.
Thank you,
ernie nunez

ernie
User ID: 1265504 Feb 5th 11:42 AM

REPAIRS.
JCWHITNEY PART NUMBERS FOR DOGHOUSE REPAIRS

3/8 INCH THICK FOILED INSULATION 4X5 FEET, P/N WA 250705N
HIGH TEMP SPRY ADHESIVE: WA8114606B
SELF ADHESIVE EDGE FOIL: NO PART NUMBER, BUT I AM WORKING ON IT.
THANK YOU,ERNIE

ron
User ID: 9732463 Feb 15th 9:29 PM
added 2 4in ducks from behind grill over the radiator to blow cool air while going down the road on a class a mh, made homemade medal duck to attach the hose behind grill ran thru the rubber flap that was over radiator also gives cooler air to the intake for carb

TallPaul
User ID: 7984023 May 16th 11:36 AM
Interesting. I had someone who dealt with E350 ambulances tell me to put air vents in the hood (boat bilge type vents) and it would run a lot cooler, but those would let water in, so I never did it. I like the ducting idea, if I can find room, but also the deflector to drive some cool road air up around the engine might be the solution. Maybe I'll try to run some ducts from below the bumper to go up around the engine.

Richard User ID: 0624334	Aug 29th 10:03 PM I have a '96 Class C Jamboree built on a Ford E-350 chassis with a 460 V8 engine. In the summer months, the dog house on the driver's side gets very hot while the passenger side is OK. Where can I get some of the foil backed insulation to add to the factory installed insulation. The factory material is about one-half inch thich and I think I need about an inch to stop the heat transfer. More importantly, if I can find the insulation, how do I attach it to the existing insulation? Is there a glue that wiii stand the temperature of the engine manifolds?
TXiceman User ID: 7956543	Aug 30th 9:59 AM Wwe had the floor and engine heat problem on our 1999 E-450 SD Minie Winnie. There was no insulation in the floor and only a thin heat shield on the engine cover. I ordered a 3/8" thick foil backed fiber insulation from J.C.Whitney and there high temperature spray adhesive along with the foil tape to seal the edges. Been on for over 2 years now and doing fine. Cured the heat problems. You can get to them at www.jcwhitney.com. Ken W
Mike Moderator User ID: 1181464	Aug 30th 10:52 AM Richard, This is a problem shared with the Chevy 454s as well. Simply adding the extra insulation to the underside of the dog house isn't necessarily going to help your situation as the heat is going to be reflected back to the engine. The problem with the 454s was the lack of a deflector to move the hot air out from under the dog house on the right side. One was installed on the drivers side but not on the passenger side. This may be the problem with your rig as well and you may have to figure a way to get the hot air out so it doesn't overheat the doghouse cover. I have a friend with an older Class C built on a Dodge chassis who had the same problem. The temperatures got so high that the carpeting on the right side of his doghouse actually melted! Installing an air deflector and extra insulation cured the problem. Mike
Richard User ID: 0624334	Aug 30th 7:11 PM Thanks for the quick replies. I will run all these options to ground and now believe I can "fix" it.
KOG User ID: 9593383	Sep 3rd 6:42 PM No need to fabricate the shield. It's about $17 at your Chevy dealer. I have a new one sitting in my shop to be installed before we travel again.
Jim L User ID: 0547294	Nov 8th 7:56 PM Mike: Could you please give us the part number of this shield once again? I can't seem to get your page to come up. I ordered it, but the parts man lost the order and the number!! Please help!
Mike Moderator User ID: 9405543	Nov 8th 11:32 PM Jim, The part number shown in my manual for the "right hand engine heat splash shield" is 15983041. Be sure to ask if it will fit your MH. It became standard equipment on 7/15/93, VIN #321432. As this thread is so old I kinda forgot about the heat shield part of it and deleted the page some time back to make room for something else. Mike
dave costa User ID: 2052144	Nov 9th 9:41 AM Mike... I bought one and installed it. Works great. I have noticed that while driving in the city 35-45 back roads that the engine temp goes down and then when stopped would go up alittle. Then drive again and it goes down. Works like a regular car. This was not happening before. Thanks again
Warren Nelson User ID: 1613614	Jul 10th 7:19 AM McMaster-carr has foil faced thermal acoustic foam with Pressure sensitive adhesive backing. Not all foams are equal. The Mcmaster foil is the same product many of the truck manufacturers use.
Eric User ID: 1293074	Feb 15th 11:02 PM A long time ago, we had a 78 Pace arrow with the 440 dodge engine and it had a problem with heat on the whole doghouse. Dad fixed this with flexible tubing from the front grille to the top area of the engine. this created a draft of cool air to the doghouse area and never had cracked sparkplugs or bad wires. Also we (as kids) could finally sit on the doghouse while we were going down the road and it was never hot again. so just run some foil ducts up to the engine compartment and that will solve it.
robert User ID: 0087674	Aug 26th 5:44 AM We have a 1990 Windjammer with a 454 class A, I used a section of alum. It works great, Liquid nailed it on the engine hump, It hangs down a tad, But reflects the heat just great,,,,,
Ernie Nunez User ID: 8868883	Jan 31st 7:22 PM Robert, Can you elaborate more on the on the fix to reflect the heat. Maybe a diagram, my e-mail address is moocat@earthlink.net. Thank you, ernie nunez
ernie User ID: 1265504	Feb 5th 11:42 AM REPAIRS. JCWHITNEY PART NUMBERS FOR DOGHOUSE REPAIRS 3/8 INCH THICK FOILED INSULATION 4X5 FEET, P/N WA 250705N HIGH TEMP SPRY ADHESIVE: WA8114606B SELF ADHESIVE EDGE FOIL: NO PART NUMBER, BUT I AM WORKING ON IT. THANK YOU,ERNIE
ron User ID: 9732463	Feb 15th 9:29 PM added 2 4in ducks from behind grill over the radiator to blow cool air while going down the road on a class a mh, made homemade medal duck to attach the hose behind grill ran thru the rubber flap that was over radiator also gives cooler air to the intake for carb
TallPaul User ID: 7984023	May 16th 11:36 AM Interesting. I had someone who dealt with E350 ambulances tell me to put air vents in the hood (boat bilge type vents) and it would run a lot cooler, but those would let water in, so I never did it. I like the ducting idea, if I can find room, but also the deflector to drive some cool road air up around the engine might be the solution. Maybe I'll try to run some ducts from below the bumper to go up around the engine.