Engine Box Insulation

[deereman]

what about using some kind of spray in insulation like "great stuff" or similiar?

[east tx skier]

BriEOD had his old motorbox sprayed with bedliner (linex). Said it worked well. Not sure on its noise reducing qualities though.

[etduc]

Can anyone provide some links/info for some replacement engine box insulation.

The stuff on my 94 is in horrible shape and I want to tear it out.

I have been unsuccessful using the TMC Google search but I am sure this has come up here before.

Thanks.

DId my 94 last year. The Dynamat didn't really help much, on either sound or heat control.
(Wrong material, wrong application.) The Thermplex, etc. is used in the hvac business, and works amazingly well, for heat control...probably not so well on sound control. I used 1/2" fiberglass duct liner, and spay adhesive. Still not as quiet as stock.

The orginal material (foam) is used in the home speaker cabinet construction (speaker grills/interior baffling) in the past. Yes, it doesn't last forever, but best for sound control/heat. Try googleing, home speaker kits.

[dtc]

Hey Craig ...

In an effort to not get near the line that defines "promotions of products/services", I'll keep this brief. If you, or anyone else, are interested in more detail, please feel free to pm me.

The stuff that Overton's was selling was "The Insulator" and was specifically branded as "thermal-acousitc insulation". I was able to purchase a packaged 4'x6' sheet (forgot which of the two thickness I purchased) from a local RV store out of their product/supplier catalog.

I'm fairly certain the stuff is Manufactured in AZ by a company somewhere near Chandler.

Hope that helps ...

Btw, speaking from experience ... DO NOT store/leave the shipped package with the blue ink on your upholstery if you don't get to the project after you order this product. Mine bleed onto the upholstery and dyed the white into a blue in some spots. I couldn't, nor could any of the professionals, get the ink out, and we had to redye/paint the seats with a color matched white.

Good luck with your project and go safely enjoy the water!

[wheelerd]

I bought acoustic insulating foam from McMaster-Carr . . . but haven't had time to install it yet since I'm just finishing installing my new upholstery.

http://www.mcmaster.com/#sound-absorbing-foam/=290632

I ordered 8' of the 1 inch skinned adhesive-backed. It has the highest noise reduction coefficient. Specs say adhesive is good to 225 degrees.

[BrianM]

My insulation finally completely gave up the ghost. Took the rest of the funky stuff off and I have to say that now it is substantially louder inside the boat. Since the kit is no longer available at Overtons I have been looking local and came up with this stuff. http://www.lowes.com/lowes/lkn?actio...025&lpage=none Seems like it would work perfect using the 3m spray adhesive and foil tape at the seams.

[babymoore3]

This is what I will be using next year. My foam from the factory has never stayed put. I am sick of it, so I will be installing this stuff.

http://www.secondskinaudio.com/vibra...lifier-pro.php

Cameron,
Do you know someone that has done this or what brings you to say this is the stuff? Saw Overton's is out of there kit and it seems like it may hold water (fiberglass appearance) so I am looking at options. Dynaliner appears to be another perspective option... just checking...

http://www.dynamat.com/products_automotive_dynaliner.html

[babymoore3]

On another note, what are they doing in the new MCs?

[wheelerd]

Check out this insulation from McMaster Carr:

http://www.mcmaster.com/#sound-control-insulation/=2u4wxr

I just installed it in my motor box and was on the lake today for the first time with it. I used the 1 inch skinned self-adhesive stuff. Time will tell how the adhesive holds but it sure is quiet. I can hear the exhaust rumble better now.

[CantRepeat]

I used this when I replaced the stuff in my 92. I got it from Overtons.

[CantRepeat]

Oh and I got some glue remover from the automotive paint store that made removing the old stuff a snap!

[babymoore3]

Overton's is sold out so I started looking for other options that may be better?

[Sodar]

Cameron,
Do you know someone that has done this or what brings you to say this is the stuff? Saw Overton's is out of there kit and it seems like it may hold water (fiberglass appearance) so I am looking at options. Dynaliner appears to be another perspective option... just checking...

http://www.dynamat.com/products_auto...dynaliner.html

Never said it was "the stuff" just said that it is what I will be using since I have read nothing but good things about it on a couple of truck/car forums that use it for quieting down the cab.

If you want to go with a less expensive route, BrianM recently installed this stuff. Looks to be a great buy and a great replacement.

http://www.lobucrod.com/index.html

[BrianM]

As Sodar said I did the stuff he posted a link to. Overall I am very happy. The material itself is thin but the noise/insulating properties seem to be about the same as the original foam. The price was definitely right at a total of less than $75 including the insulation, tape and 3m adhesive. Installation was pretty easy and the material was easy to work with. One roll is just enough to do the engine box with just a little left over. I would recommend it.

[wheelerd]

Here's a pic of my installation using the foam I mentioned above from McMaster-Carr.