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06-19-2021, 08:01 PM
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#1
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Junior Member
Brand: Thor Motor Coach
Model: Challenger
State: Mississippi
Posts: 6
THOR #21519
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Noise and heat reduction on a gas engine A Class
Has anyone installed a noise / heat reducing material under the engine cover inside the cab of your gas engine motor home? Did it make a significant difference? What brand of material did you use?
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06-19-2021, 08:27 PM
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#2
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Senior Member
Brand: Thor Motor Coach
Model: Axis 24.1
State: Connecticut
Posts: 1,797
THOR #20289
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Do a search on "doghouse" and you will find lots of threads on this topic.
David
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06-19-2021, 09:02 PM
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#3
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Site Team
Brand: Thor Motor Coach
Model: ACE 27.1
State: Florida
Posts: 14,389
THOR #7035
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Quote:
Originally Posted by bhill39443
Has anyone installed a noise / heat reducing material under the engine cover inside the cab of your gas engine motor home? Did it make a significant difference? What brand of material did you use?
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Yes
Many people
Makes a big difference
Dynamat is one brand
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Ted & Melinda
2016 ACE 27.1
2016 Chevy Sonic Toad - Selling
2020 Chevy Colorado Z71 Trail Runner Toad
2024 Chevrolet Trax 2RS - Soon 2B TOAD
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06-19-2021, 09:32 PM
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#4
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Senior Member
Brand: Thor Motor Coach
Model: '17-Vegas 24.1
State: California
Posts: 2,227
THOR #13362
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Also…Google it and you’ll find YouTube videos on how-to as well
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'17 Vegas 24.1
Fallbrook, CA
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06-19-2021, 11:03 PM
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#5
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Senior Member
Brand: Thor Motor Coach
Model: Hurricane 29M
State: Texas
Posts: 2,728
THOR #11781
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I have no problem with heat or noise from the engine of my gasser.
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Lt Keefer
2018 Hurricane 29M
CHF, Saf-T-Plus, SumoSprings
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06-20-2021, 12:52 AM
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#6
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Senior Member
Brand: Thor Motor Coach
Model: Vegas 25.6
State: New Mexico
Posts: 5,127
THOR #20220
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Dynamat in dog house..less heat less noise..
We could not touch the doghouse before this fix
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LAS CRUCES 2020 Thor Vegas 25.6
Lora & George. Golden Retriever & Multi-Gen Australian labradoodle & new ALD in March. Happy Campers!! E Biking, Hiking, Tennis, Scuba,Fishing,Cross Country Skiing, Snowshoeing. Retired H.S. Principal, Sr. IT Engineer, Life & Health Insurance Agent
"Today is a Gift and Why it is called the Present"
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06-20-2021, 02:11 AM
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#7
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Senior Member
Brand: Thor Motor Coach
Model: Chateau 24F
State: Ohio
Posts: 4,186
THOR #16721
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Just did this in our class C with legacy 6.8 liter Ford V10. I went a little further than most. I removed the existing foil "hood liner" heat shield, exposing the bare plastic doghouse. I covered the doghouse inside with Kilmat, followed by a layer of Noico foam, followed by reinstall of the foil heat shield.
The Kilmat is to prevent resonant vibration; the Noico foam is to absorb sound waves. The factory foil hood liner is important to reflect heat away from the layers underneath.
Then the icing on the cake - I removed the front seats and floor mat exposing the bare metal cabin floor - then applied the Kilmat/Noico combo on the floor.
The results were astounding... I didn't realize there was so much wind noise until I got rid of the engine/road noise! But the wife is very happy with the noise reduction.
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06-20-2021, 02:32 AM
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#8
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Senior Member
Brand: Thor Motor Coach
Model: A.C.E. 27.2
State: Indiana
Posts: 1,886
THOR #14698
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Quote:
Originally Posted by Lt Keefer
I have no problem with heat or noise from the engine of my gasser.
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Me neither. The only time the V10 gets a bit noisy is standing on the go peddle.
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2018 ACE 27.2
Toad 2019 Jeep Cherokee Trailhawk
Roadmaster Falcon All Terrain Towbar
Roadmaster Invisibrake
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06-20-2021, 02:32 AM
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#9
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Senior Member
Brand: Thor Motor Coach
Model: Chateau 24F
State: Ohio
Posts: 4,186
THOR #16721
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Results...
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06-30-2021, 07:50 PM
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#10
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Senior Member
Brand: Cruiser
Model: Georgetown 30x3
State: Idaho
Posts: 223
THOR #17441
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Quote:
Originally Posted by MJC62
Me neither. The only time the V10 gets a bit noisy is standing on the go peddle.
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If you lived in the mountain west you’d make noisy a lot more often when going up and down the mountain passes. On the downs I only stab the brakes to cause a downshift when needed.
I tried the plastic hose fix someone suggested a while back. It didn’t reduce noise but seemed to reduce mileage a bit. Took it off.
Mine isn’t bad anyway but you can hear it as the revs approach 4,000.
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06-30-2021, 07:56 PM
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#11
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Member
Brand: Thor Motor Coach
Model: Axis 25.3
State: Alabama
Posts: 79
THOR #20803
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Just did the Dynamat stuff on our ‘17 Axis 25.3. Did three weeks ago then went out on 2,900 mi trip. WOW what a difference Nice and quiet. Covered the complete cowling, but getting a few of the screws out was a pain as there’s some “wood” in the way. Replaced screws with 1/4 nut drives. You won’t be disappointed-! Ps ordered from Amazon and also got the tape and roller....
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Bob Ammons, aka AMMO BoB
USAF Retired
2017 Axis 25.3
Toad-undecided
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06-30-2021, 08:38 PM
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#12
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Senior Member
Brand: Thor Motor Coach
Model: Miramar 35.3
State: Pennsylvania
Posts: 211
THOR #20808
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Cool it and then a layer of DynaMat on the doghouse. And under just about every thing else too.
Additionally the area right front of the doghouse where it is a metal cover, the area under the dash in the hood area, the area about the cat converter, etc. etc. I have about $300 in sound deadening and it sounds quiet now!
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06-30-2021, 09:33 PM
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#13
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Senior Member
Brand: Thor Motor Coach
Model: Vegas 25.6
State: New Mexico
Posts: 5,127
THOR #20220
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Just drove 6 hours 70 75 mph dog house warm..before dynamat could not touch after 2 hours
__________________
LAS CRUCES 2020 Thor Vegas 25.6
Lora & George. Golden Retriever & Multi-Gen Australian labradoodle & new ALD in March. Happy Campers!! E Biking, Hiking, Tennis, Scuba,Fishing,Cross Country Skiing, Snowshoeing. Retired H.S. Principal, Sr. IT Engineer, Life & Health Insurance Agent
"Today is a Gift and Why it is called the Present"
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06-30-2021, 09:39 PM
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#14
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Junior Member
Brand: Jayco
State: New Jersey
Posts: 21
THOR #19560
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In the area "under the hood" what did you use for adhesive to hold the Dynamite in place?
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06-30-2021, 09:40 PM
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#15
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Senior Member
Brand: Thor Motor Coach
Model: '17-Vegas 24.1
State: California
Posts: 2,227
THOR #13362
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Quote:
Originally Posted by Thor 25
Just did the Dynamat stuff on our ‘17 Axis 25.3. Did three weeks ago then went out on 2,900 mi trip. WOW what a difference Nice and quiet. Covered the complete cowling, but getting a few of the screws out was a pain as there’s some “wood” in the way. Replaced screws with 1/4 nut drives. You won’t be disappointed-! Ps ordered from Amazon and also got the tape and roller....
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Glad you figured that “hack” out
Once the hex screws are used, it’s ez to access doghouse in future.
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'17 Vegas 24.1
Fallbrook, CA
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06-30-2021, 09:42 PM
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#16
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Senior Member
Brand: Thor Motor Coach
Model: '17-Vegas 24.1
State: California
Posts: 2,227
THOR #13362
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Quote:
Originally Posted by salzerj@comcast.net
In the area "under the hood" what did you use for adhesive to hold the Dynamite in place?
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What most of us use is the adhesive-backed products that self-stick
Also, HVAC 2”-3” tape helps with seams
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'17 Vegas 24.1
Fallbrook, CA
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06-30-2021, 11:43 PM
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#17
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Site Team
Brand: Entegra
Model: Accolade 37TS
State: South Dakota
Posts: 8,781
THOR #1469
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Quote:
Originally Posted by salzerj@comcast.net
In the area "under the hood" what did you use for adhesive to hold the Dynamite in place?
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Dynamat is self adhesive and is designed to be hung on vertical or overhead surfaces unlike other products.
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07-01-2021, 12:25 AM
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#18
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Member
Brand: Thor Motor Coach
Model: Axis 25.3
State: Alabama
Posts: 79
THOR #20803
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It’s backing is very strong/sticky. The tape is like “aluminum” as well for added strength
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Bob Ammons, aka AMMO BoB
USAF Retired
2017 Axis 25.3
Toad-undecided
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07-01-2021, 01:34 AM
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#19
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Junior Member
Brand: Still Looking
State: Michigan
Posts: 4
THOR #24035
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Class C Ford E450 6.7 V10 Doghouse Heat Shield and Noise Reduction
Try https://www.mkhsupply.com/rv-heat-sh...at-shield.html
Made expressly for this engine and vehicle. Works great.
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07-01-2021, 01:39 AM
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#20
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Senior Member
Brand: Thor Motor Coach
Model: Windsport 29m
State: North Carolina
Posts: 524
THOR #9553
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Quote:
Originally Posted by bhill39443
Has anyone installed a noise / heat reducing material under the engine cover inside the cab of your gas engine motor home? Did it make a significant difference? What brand of material did you use?
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One of the first things I ordered for my 2018 Thor Windsport 29m was a roll of sound/heat insulation. Forget the name, but it was not real thick but highly recommended. I covered the entire inside of the doghouse with almost 3 layers. Why not, what else would I have done with the rest?? Made a huge diff in how hot the it got to the touch and a noticeable reduction of noise too!!! Bob Trice
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