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Topic: Engine compartment redo (Read 1348 times) previous topic - next topic

Engine compartment redo

Has anyone used thermozite to replace old insulation in engine bay? I wonder what foretravel uses on refub?
Ken & Peggy
91 GV  U300 40'
DD 6v92
Build #3819
2023 Canyon Denali 4x4 crew cab

Re: Engine compartment redo

Reply #1 –
The old insulation burns quickly and very hot. I pulled ours and put a layer of FG and then covered with Hardie Backerboard with stainless screws and washers to hold it on. Good to do in the generator compartment and fridge too.

Pierce
Pierce and Gaylie Stewart
'93 U300/36 WTBI
Detroit 6V-92TA Jake
1140 watts on the roof
SBFD (ret)

Re: Engine compartment redo

Reply #2 –
Pierce
What are calling dog?

Ken
Ken & Peggy
91 GV  U300 40'
DD 6v92
Build #3819
2023 Canyon Denali 4x4 crew cab

Re: Engine compartment redo

Reply #3 –
I hate auto correct. Meant to say what are calling fg?
Ken & Peggy
91 GV  U300 40'
DD 6v92
Build #3819
2023 Canyon Denali 4x4 crew cab

Re: Engine compartment redo

Reply #4 –
Fiber Glass
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: Engine compartment redo

Reply #5 –
Quote from: kpbowser –
Pierce
What are calling dog?
Ken
Wasn't that in the news yesterday? :)  :)  Yes, I just went to HD and picked up a roll of R19 and then compressed it under the Backerboard. I primed it and then painted it with semi-gloss white latex. Won't absorb grease this way. Bedroom seems to say cooler after stopping in the summer. One member lost his U300 when the turbo outlet came off after some shop maintenance went south. He saw black smoke in the mirror. Pulled over and just had time to get out.

Pierce
Pierce and Gaylie Stewart
'93 U300/36 WTBI
Detroit 6V-92TA Jake
1140 watts on the roof
SBFD (ret)

Re: Engine compartment redo

Reply #6 –
Pierce,

I like the looks of your installation!  How heavy is that Backerboard?  That's a pretty good sized sheet of material above the engine, and our mattress platform already feels like it weighs a ton (or close to it) when I lift it.  Perhaps we just need to get a Sleep Number...
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: Engine compartment redo

Reply #7 –
Chuck 1/4" DraRock weighs about 2# per sqft... scales up too if you have 1/2" backer

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My advice and experiences are Free, you decide if they are worth anything .

John - driving Old Faithful
1994 U280 GV
C8.3, Banks, Pacbrake, 900 watts, Resonator, XLHD tow dolly
Retired Army Warrant Officer

Life is what you make of it - if it is lemons, make lemonade!
Former Coaches:
1988 GV 40' ORED 300HP CAT - 9 years
1990 Winnebago LeSharo - 3 years
2000 Newmar London Aire - 3 years (#18 of 23 produced)

Re: Engine compartment redo

Reply #8 –
It is 1/4 inch and has a pillow top queen on top. I don't have any problem lifting it but it would be nice to have larger struts but I don't notice that much difference from before. I keep a big stick to prop it open in the compartment with the electrical stuff on the driver's side. Nothing will burn through this stuff.

Pierce
Pierce and Gaylie Stewart
'93 U300/36 WTBI
Detroit 6V-92TA Jake
1140 watts on the roof
SBFD (ret)

Re: Engine compartment redo

Reply #9 –
Mine is in pretty decent condition, no rips etc. When I do decide to upgrade, it will be with Fire Rated ply, or some other Thin lightweight Fireproof material with Lizard Skin Ceramic Spray on top.

Typically used on Racecars/Restorods, etc. I used it when I had a Car "Problem" . This stuff is awesome and should be good for this application.

| LizardSkin
Prior 2003 U295  40ft  400Hp -Sold
2020 F350 Tremor - Sold
2021 Bundutec Roadrunner - Sold
2017 Airstream Classic - Sold that POS
2017 F250 - Sold
2019 Sprinter Van - Sold
2022 Winnebago Revel 4x4


Army Airborne Vet.

Re: Engine compartment redo

Reply #10 –
Quote from: Pierce & Gaylie Stewart –
Nothing will burn through this stuff.
Pierce

Dump some bricquettes from your next bbq on a piece of 1/4 Hardy over a piece of plywood and get back to me on this.  Not trying to be a buzzkill, and not saying it won't do the job on a motorhome but it has far less fire resistance than I had thought.




"Not so  long ago we were a nation of risk takers, riding five million pounds of  thrust straight into space."  Joe Gresh
Chuck Pearson
1996 U295
2018 Can Am X3 TurboRS

Re: Engine compartment redo

Reply #11 –
Quote from: Chuck Pearson –
Dump some bricquettes from your next bbq on a piece of 1/4 Hardy over a piece of plywood and get back to me on this.  Not trying to be a buzzkill, and not saying it won't do the job on a motorhome but it has far less fire resistance than I had thought.
Chuck,

I used 1/4" inch on our coach. I have a piece on my welding bench and use the wire feed, oxyacetylene welding and copper soldering using MAPP gas. I've turned the torch directly on it and not had it deteriorate in any way. I like it because it does not seem to conduct much heat to the other side so I can rest my hand close and not get burned.

Tomorrow, I will take a piece and put the MAPP gas torch to one side and shoot the other with my IR gun and record it with a couple of photos and report back.

Good subject!

Pierce
Pierce and Gaylie Stewart
'93 U300/36 WTBI
Detroit 6V-92TA Jake
1140 watts on the roof
SBFD (ret)

Re: Engine compartment redo

Reply #12 –
Pierce, nothing scientific about my opinion.  Here's my experience.

After a great offshore outing, we had a party on the deck....I cooked Thai seasoned fish kebabs, using an old smokey joe cooker, and natural chunk charcoal.  This small cooker was sitting on a piece of 1/4 hardy on a plywood table. Fire was damped down, covered, air intakes closed.  Anyhow, after far too much celebratory behavior, everyone hit the sack..

I woke up in the morning and found.....the bottom of the old galvanized steel cooker had finally given out and what remained of the charcoal had dropped onto the hardy, burned through it, burned through the plywood table, burned through the 2X6 3rd floor deck, burned through the 2X6 2nd floor deck, and dropped down into the watergarden on ground floor.  I gave thanks to the Gods who protect fools and made note of the almost perfectly round 8" hole through all materials.  J. Hardie co.  states that 1/4 backerboard can be a component in a one hour wall.  Don't think, but could be wrong, that it has a fire rating as stand alone mtl.

"Not so  long ago we were a nation of risk takers, riding five million pounds of  thrust straight into space."  Joe Gresh
Chuck Pearson
1996 U295
2018 Can Am X3 TurboRS
 

Re: Engine compartment redo

Reply #13 –
Several of us Wanderlodge folks have used 1" duct board. The foil is easy to keep clean and does a pretty good job of insulating. I just did my generator compartment with it. Make sure to tape the raw edges with metal tape.

TOM
SOB (Some Other Brand) division
1995 Wanderlodge WB40
8V92 :D