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Old 05-04-2017, 09:51 PM   #1
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Insulation for my engine cover.

My engine cover area needs more insulation. The floor is good but the actual engine cover gets pretty hot even with the old factory insulation. Whats best to add underneath? or should i try to glue/screw something to the cover inside the bus with us.

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Old 05-05-2017, 06:44 AM   #2
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My engine cover area needs more insulation. The floor is good but the actual engine cover gets pretty hot even with the old factory insulation. Whats best to add underneath? or should i try to glue/screw something to the cover inside the bus with us.
DynaMat and like products are very good - and very expensive. Some home improvement stores have "rubberized flashing" which is similar to DynaMat and is more affordable. It works well.

Anything will be better than nothing and doing both sides will be best. However; I've not had great success getting insulation to hang upside down on engine covers. Some do it successfully but I guess I don't clean well enough or attach well enough or something...
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Old 05-05-2017, 10:17 AM   #3
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DynaMat and like products are very good - and very expensive. Some home improvement stores have "rubberized flashing" which is similar to DynaMat and is more affordable. It works well.

Anything will be better than nothing and doing both sides will be best. However; I've not had great success getting insulation to hang upside down on engine covers. Some do it successfully but I guess I don't clean well enough or attach well enough or something...
I have been watching youtube videos on this and saw the dynamat equivalent from the hardware store. My only concern is that it has tar on the back side. What are the fumes like? My wife has allergies and is extremely sensitive to odors.
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Old 05-05-2017, 11:40 AM   #4
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I'm curious what others use also. I have been wanting to cover the engine cover to make it quieter and cooler but have not yet attempted to tackle it.
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Old 05-05-2017, 01:08 PM   #5
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i tried that dynamat alternative from HD. it works fine, but it doesn't hang upside down for long.

i applied it to the underside of my doghouse, and as the engine heated up the tar loosens and it falls off. it also leaves a big mess of tar down the engine where it drips.

someone else applied the same stuff the the top of their doghouse and then glued down auto carpet on top of it. it looked great. i will copy when i get around to it again.

i had a thread about interior noise a few years back when i did the dynomat. it lowered the noise by ~5 dbs. enough to make it worth it.
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Old 05-05-2017, 02:48 PM   #6
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I smell a little something when I install it but nothing after that. However; I'm not very smell sensitive so not a good one to comment on that.

Here is an install I did a few years ago in an older MH. It made a difference but I did not do the doghouse as I could not figure out how to glue carpet to it.
Who needs friends like these?? - JdFinley.com

Here is a recent install on my current home. Again, seems to make a difference but I didn't attempt to measure it. And again, none of this is hanging upside down or on the engine side of the wall.
Closing the Gaping Hole - JdFinley.com

I read about a guy that covered the inside of a van with MLV and said it made a big difference. I would think so but probably weighed a ton and had to take an enormous amount of time.
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Old 05-05-2017, 02:52 PM   #7
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I'm just gonna build a "box" type cover out of plywood that will cover the doghouse and serve as a table and will have a couple cup holders for me, the driver.
I'll insulate the heck out of it with rockwool. Rockwool is GREAT for deadening sound and is also fire proof.
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Old 05-05-2017, 02:56 PM   #8
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Rockwool is great stuff but it can and will hold moisture. In fact, it is used by many growers as a seed starter medium because it holds moisture so well.
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Old 05-05-2017, 04:13 PM   #9
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Rockwool is great stuff but it can and will hold moisture. In fact, it is used by many growers as a seed starter medium because it holds moisture so well.
The kind used for insulation is hydrophobic. And its inorganic.
Besides- its not gonna get wet under plywood over a sealed plastic engine cover. Would be a great choice as it can slow the progression of a fire. Why i'm using it for interior walls.
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Old 05-05-2017, 05:22 PM   #10
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That is some amazing stuff. Is it available at local big box stores or do you have to purchase somewhere else?
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Old 05-05-2017, 08:48 PM   #11
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I tried Hushmat and it doesnt hang vertical for long either.. I like the idea of a cover over the doghouse.. but on my DEV bus, my foot is right up against it.. I also found that the engine cover wasnt the only thing leaking.. I had hot feet from the negative pressure on the bus.. from hot air seeping in from around wires, the steering column.. between the metal and the plywood etc. ...

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Old 05-05-2017, 10:03 PM   #12
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So could i make a rockwool mat? Sandwich it between chicken wire layers so i can put it under the cover?

OR should i put a air scoop somewhere and duct fresh air back to the dog house? Help blow the heat out going down the road.

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Old 05-05-2017, 10:19 PM   #13
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Cool Beans! That's not your daddy's rockwool!
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Old 05-15-2017, 05:25 PM   #14
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So could i make a rockwool mat? Sandwich it between chicken wire layers so i can put it under the cover?

OR should i put a air scoop somewhere and duct fresh air back to the dog house? Help blow the heat out going down the road.

Sent from my VS986 using Tapatalk
Chicken wire holding the insulation on the bottom is a great idea! Thanks
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Old 05-15-2017, 06:20 PM   #15
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I haven't had time to try anything yet. Trying to get ready for my daughter's High School graduation weekend. Graduates Saturday with high honors. I don't know exactly what it takes to get that but it sounds really good . She wants to spend the weekend camping at the Jeep Ranch . That means I have to get 2 Jeeps, a bus, and a minivan ready to roll.

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Old 05-16-2017, 10:59 AM   #16
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I bought a Thermo-Tec product for our doghouse, but I haven't put it on there yet. This is the one: http://a.co/f2ClKkR

I am still looking for the best option for reducing heat under the driver's feet. We might add a heat shield of some sort underneath, but I'd like to find a cheaper solution than the Lizard Skin stuff that is oh so expensive.
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Old 05-16-2017, 08:28 PM   #17
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I boxed mine in.
Before
20150503_094310 by Hvbuzz, on Flickr

After
20150503_103219 by Hvbuzz, on Flickr

It made a huge improvement and I didn't even add insulation. Just an air gap. I made it so it won't be to hard to take apart, incase the doghouse needs to come off. Probably wouldn't work well though for the OP since you have a van cut away. Probably pretty tight on space already. As much as it helps, my feet while driving, still get hot.

So i'm hoping the hood scoop helps that.

20170511_175800 by Hvbuzz, on Flickr

I'll let you know in a couple weeks when we start to travel some for vacation.
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Old 05-16-2017, 08:47 PM   #18
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I boxed mine in.
Before
20150503_094310 by Hvbuzz, on Flickr

After
20150503_103219 by Hvbuzz, on Flickr

It made a huge improvement and I didn't even add insulation. Just an air gap. I made it so it won't be to hard to take apart, incase the doghouse needs to come off. Probably wouldn't work well though for the OP since you have a van cut away. Probably pretty tight on space already. As much as it helps, my feet while driving, still get hot.

So i'm hoping the hood scoop helps that.

20170511_175800 by Hvbuzz, on Flickr

I'll let you know in a couple weeks when we start to travel some for vacation.
YOu and I often think alike, man!!
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Old 05-18-2017, 08:48 AM   #19
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Originally Posted by Hvbuzz View Post
I boxed mine in.
Before
20150503_094310 by Hvbuzz, on Flickr

After
20150503_103219 by Hvbuzz, on Flickr

It made a huge improvement and I didn't even add insulation. Just an air gap. I made it so it won't be to hard to take apart, incase the doghouse needs to come off. Probably wouldn't work well though for the OP since you have a van cut away. Probably pretty tight on space already. As much as it helps, my feet while driving, still get hot.

So i'm hoping the hood scoop helps that.

20170511_175800 by Hvbuzz, on Flickr

I'll let you know in a couple weeks when we start to travel some for vacation.
Did you change out your headlights? They look different from normal headlights.
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Old 05-18-2017, 07:33 PM   #20
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Did you change out your headlights? They look different from normal headlights.
Yes, I changed them out to LED lights. I haven't had the bus out yet, but they seem really bright.
20170418_155622 by Hvbuzz, on Flickr

They also have daytime running lights. This is just that, not the headlight.
20170514_203611 by Hvbuzz, on Flickr
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