Free 7 Day Trial RV GPS App RV Trip Planner Campground Reviews RV Maintenance Free 7 Day Trial ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > THE OWNER'S CORNER FORUMS > Alpine Coach Owner's Forum
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
 
Thread Tools Search this Thread Display Modes
 
Old 09-19-2021, 12:45 PM   #1
Senior Member
 
Join Date: Feb 2005
Location: Livermore, CA
Posts: 179
Thoughts on Driving Without Upper Insulation in Engine Compartment

Arrived at my current destination and heard a strange sound coming from the engine compartment. The upper insulation blanket came loose and is sitting on top of the engine!

I have some mounting tape and duct tape, may try putting it back in place temporarily, or, just remove it for later better installation at home. Thoughts?
__________________
2006 Alpine Apex 40 FDQS
2002 Jeep Grand Cherokee toad
2000 Vette for the track
WeBrzn2 is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 09-19-2021, 01:30 PM   #2
Senior Member
 
Hpozzuoli's Avatar
 
Join Date: Jul 2021
Posts: 108
If it’s a pusher I would say try getting it back up, but if you can’t I wouldn’t worry. If it’s a forward control unit you should get it back in there somehow. Being up front will add noise and heat directly in the driving space.
Hpozzuoli is offline   Reply With Quote
Old 09-19-2021, 01:43 PM   #3
Senior Member
 
Join Date: Oct 2014
Posts: 3,543
In your Alpine= Diesel Pusher, I would be concerned about any insulating material sitting directly on the engine. That exhaust manifold and turbo get extremely hot.

You also have a number of moving parts back there that could allow the material to get tangled

Either secure it properly or remove it.
__________________
Brett Wolfe
Ex: 2003 Alpine 38FDDS. Ex: 1997 Safari Sahara. Ex: 1993 Foretravel U240
wolfe10 is online now   Reply With Quote
Old 09-19-2021, 01:44 PM   #4
Senior Member
 
Jayco Owners Club
Join Date: May 2016
Location: North Texas
Posts: 510
I would double check to see if leaving it on would allow for it to get anywhere near any moving parts (ie: fan belts, alt, etc.) or lying on a source of high heat as Hpozzuoli stated, and if so I would go without it for now. ~CA
__________________
2010 Jayco GreyHawk 31SS
craigav is online now   Reply With Quote
Old 09-19-2021, 02:33 PM   #5
Senior Member
 
Join Date: Jun 2018
Location: SoOC
Posts: 506
Lightbulb

Quote:
Originally Posted by WeBrzn2 View Post
Arrived at my current destination and heard a strange sound coming from the engine compartment. The upper insulation blanket came loose and is sitting on top of the engine!

I have some mounting tape and duct tape, may try putting it back in place temporarily, or, just remove it for later better installation at home. Thoughts?
Unsure what the "strange noise" sounded like.. rattle ???

I drove for a while, apparently, with the insulation laying on the diesel. It may have caused two issues:
1) failure of a turbo hose, (power greatly reduced, fuel economy bettered)
2) burst failure of the 5/8" dash heater hose on the head, forward, looking under the raised bed. The 3"x6' metal strap that had been holding the insulation in place bounced on that hose, weakening it. Some of the 3" fender washers securing it in place were gone. Easy, cheap fix, after being towed.

You probably already know how heavy that blanket gets; hence why it fell. Removal is a dirty tugging match. The decision may be a toss-up, based upon the noise cause, how far you'll drive and input here.

I posted a thread on my insulation R&R project, plus another on installing SS vents in the 'hood'. EM reported driving with it open, for cooling, which I'd definitely do if you elect to remove the fallen section.

The heat in that compartment will rather quickly make ANY tape fail, Tape securing attempts seem a waste of time. WRV used adhesive and numerous mechanical fasteners.
__________________
2007 Alpine SE 34FDDS + Cherokee Trailhawk
whalepirot is offline   Reply With Quote
Old 09-19-2021, 04:04 PM   #6
Senior Member
 
Join Date: Feb 2005
Location: Livermore, CA
Posts: 179
I appreciate the input. The blanket is indeed laying on the diesel. Iím driving 1200 miles home, thus, it seems that the best will be to pull the original blanket out, make sure that any supports are not interfering anywhere and deal with the heat in the closet and noise.
__________________
2006 Alpine Apex 40 FDQS
2002 Jeep Grand Cherokee toad
2000 Vette for the track
WeBrzn2 is offline   Reply With Quote
Old 09-19-2021, 05:21 PM   #7
Senior Member


 
Alpine Owners Club
Join Date: Oct 2017
Location: Sugar Grove IL
Posts: 101
I would remove the blanket that is over top of the engine and the one on the driverís side wall by the turbo. The blanket on the curbside wall on mine was still firmly attached and not loaded with dirt and oil like the others. It is amazing how much weight they pickup while in use. When you get home, you can take the time to do a nice job renewing everything. I ran mine without any insulation for a month while waiting for new material and making a template for what I replaced. The newer materials will not require you to use fender washers or support strips.Click image for larger version

Name:	IMG_1473.jpg
Views:	11
Size:	265.6 KB
ID:	343612Click image for larger version

Name:	IMG_2545.jpg
Views:	11
Size:	232.2 KB
ID:	343613
__________________
Mack Mover
2003 Alpine 40 MDTS
400 ISL
Bruce Anthon is offline   Reply With Quote
Old 09-20-2021, 08:06 AM   #8
Senior Member
 
veraken's Avatar


 
Monaco Owners Club
Vintage RV Owners Club
Holiday Rambler Owners Club
Join Date: Jul 2012
Location: Lexington, SC
Posts: 2,311
This is what I used. In addition to the adhesive spray, I used some screws and large washers to mechanically attach.

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
__________________
Vera & Ken
1998 Holiday Rambler Imperial, RR8S Chassis
Cummins 6C8.3 mechanical engine, 325HP, 3060 Allison
Towing 2014 Ford Explorer
veraken is offline   Reply With Quote
Old 09-20-2021, 12:15 PM   #9
Senior Member
 
dennismhamm's Avatar
 
Alpine Owners Club
Join Date: Sep 2014
Location: FLORAL CITY,FL
Posts: 580
Blog Entries: 1
Bruce Anthon, what material did you get? I need to replace mine too

Thank you in advance
__________________
Dennis & Brenda
2006 Alpine Coach 40Fd Limited
2020 Ram 2500 Heavy Duty Diesel
dennismhamm is offline   Reply With Quote
Old 09-21-2021, 09:04 PM   #10
Senior Member


 
Alpine Owners Club
Join Date: Oct 2017
Location: Sugar Grove IL
Posts: 101
I used the HushMat products. There are some extensive pictures and discussions on how and what to use that have been posted over the last year or so. If you search F104 engine compartment insulation (or something similar) you should get a bunch of information. Or feel free to send me a PM and I would be glad to help you. I learned a lot doing mine and am very pleased with the results.
__________________
Mack Mover
2003 Alpine 40 MDTS
400 ISL
Bruce Anthon is offline   Reply With Quote
Old 10-07-2021, 11:11 PM   #11
Senior Member
 
Join Date: Aug 2019
Location: Spokane, WA
Posts: 336
I just redid mine with the Hushmat product made for the inside of a car hood, ie made to stick upside down in a hot environment.

I ordered from Home Depot. The ~$100 boxes have 6 sheets. I bought 3 boxes to line the entire engine bay, minus the passenger side. Like the above poster, that side was still firmly attached, and held in place by the filter canister.

Get some sort of roller to 'pressure activate' the adhesive. I bought one intended for wall paper seams. I did mine in 2 phases, ie box 1, then boxes 2 and 3. I didn't have the roller initially. Box 1 I got pressed down pretty well with my fingers, but it was hard. In phase 2 I didn't press it down as well, and it was coming down the next morning. I went and got the roller and rolled the entire engine bay.



To address the original question...
Yes, you can drive it without that insulation. I drove mine over 100 miles missing most of it. It was both louder and warmer in the bedroom.
__________________
2005 Alpine Coach 40FDTS
Kevin and Jacquie
Full timers
Hayduke is offline   Reply With Quote
Old 10-08-2021, 09:51 AM   #12
Senior Member
 
Join Date: Sep 2015
Location: Red Bluff, Ca
Posts: 298
Bruce, Hayduke, et al,

[QUOTE=Hayduke;5942218]I just redid mine with the Hushmat product made for the inside of a car hood
I ordered from Home Depot. The ~$100 boxes have 6 sheets.

The spec sheet for the Home Depot product says it is .6 inches thick.
Bruce says the material he used was about 1/8 inch.

Did you both use the same material?

I need to redo the engine room on my 1998 Alpine soon and would like to use the most effective product.

Thanks for your input.
__________________
Gene
1998 36FDS Alpine
Red Bluff, Ca.
gmcgene is offline   Reply With Quote
Old 10-08-2021, 11:07 AM   #13
Senior Member
 
Ljwt330's Avatar
 
Join Date: Jan 2018
Location: Capistrano Beach, California
Posts: 4,137
Just a point to make about sound proofing.


There are two causes of sound production within the vehicle, vibration of the metal panels and transmission of the sound waves through or to the panels. Each cause is addressed differently. Sound deadening/dampening deals with the vibration, sound absorbing deals with the transmission of sound waves.

Hushmat and the like products are designed to reduce the vibration of the metal panels to which they are adhered. That, in turn, reduces the noise transmitted to the interior of the vehicle through vibration/oscillation of the metal. These products only need to be applied to about 1/3 of the metal panel to be effective. Adding more just increases weight. However, if you wish to include heat reflection, full application will work.

Transmission of sound waves to and through the metal is done by "disconnecting" the sound waves from the panels by air pockets. That's why the engine compartment of cars and RVs have a blanket of fiberglass or foam material on the underside to absorb the sound waves from the engine and road. The OEM blanket provides that sound absorbing function.

The ideal soundproofing of the engine bay would include both types of materials. First, a partial covering of the metal panels by the heavy solid material like Hushmat, but without the foil. Then, a complete covering of the bay with a blanket/thermal barrier that has a reflective foil. OEM used the blanket without the heavy vibration reducing material, but achieved sound deadening and heat transfer reduction into the interior.
__________________
Larry, Eileen, and Finley
2004 Alpine 36FDDS
Third motor home, first Alpine, no need for another.
Ljwt330 is offline   Reply With Quote
Old 10-08-2021, 11:32 AM   #14
Senior Member
 
Join Date: Oct 2014
Posts: 3,543
With the engine/drive train 30+ feet behind you, not sure sound-deadening is as critical an issue as this discussion is indicating.


Yes, if you are very sensitive to noise or have someone traveling in the rear of the coach, certainly worth extra effort.
__________________
Brett Wolfe
Ex: 2003 Alpine 38FDDS. Ex: 1997 Safari Sahara. Ex: 1993 Foretravel U240
wolfe10 is online now   Reply With Quote
Reply

Tags
engine



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Upper Radiator Hose Contact With Upper Shroud vettenuts Workhorse and Chevrolet Chassis Motorhome Forum 5 08-05-2018 07:54 AM
Engine Compartment Insulation I.D. Help Family Time National RV Owner's Forum 3 10-23-2012 06:07 AM
Insulation in engine compartment augar boy iRV2.com General Discussion 8 01-28-2012 05:46 PM
Engine compartment insulation failure Basil Shannon Alpine Coach Owner's Forum 9 10-30-2010 06:51 PM
Insulation in the engine compartment Lindenberg Alpine Coach Owner's Forum 3 07-31-2007 07:56 PM

» Featured Campgrounds

Reviews provided by


All times are GMT -6. The time now is 01:43 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.