Side effect of sound dampening with HLiner (B-Quiet) - Defender Source
Defender Source  

Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions


Reply
 
Thread Tools
  #1  
Old June 28th, 2013, 08:17 PM
silverlight's Avatar
silverlight
Status: Offline
Geoff
1993 Defender 110 NAS
Member
 
Join Date: Aug 2011
Location: NYState
Posts: 103
Side effect of sound dampening with HLiner (B-Quiet)

So I installed a sheet of HLiner from B-Quiet this afternoon (http://www.b-quiet.com/hliner.html). While I wasn't fond of sticking something on underside of the hood / bonnet, I am starting to do a few sound proofing items in the vehicle (have held off so far on dynamat with the interior opting to do that just in the battery compartment, passenger compartment, and have used some foam+mass loaded vinyl under the mats). I have to say the liner under the hood made by far the biggest difference with engine noise. My wife commented to me this evening how quiet the Defender was windows up or windows down. Before I could lightly hear the shifting and had to listen for it, and now I REALLY hear the shifting given the quiet background.

So here's the catch which has me wondering. One of the side effects of the HLiner is that it also reflects heat. This is clearly a good thing from the standpoint of the paint on the hood, but not sure it's a good thing for the engine as I feel there's a lot more heat in the engine bay now after driving around for a while. The hood is cold to the touch, the top of the wheel wells are pretty hot and opening up the hood / engine area, it's definitely pretty hot. Clearly the hood was a big heat sink like a fanless setup for a CPU on a board with the outdoor air helping dissipate the heat from the hood. So query, should I be worried about this? Certainly LOVE the new found quietness in the cabin.

(One other strategy may be to cut away the HLiner in the 4+ holes in the cross bars which would allow some heat to move up into those columns, but I know from a sound proofing perspective have a full panel has the highest benefit which is why I started there)

Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old June 28th, 2013, 09:05 PM
crown14's Avatar
crown14
Status: Offline
Verticalscrote
Volkswagen Super Beetle
D-90 Source Vendor
 
Join Date: Jul 2006
Location: 44 Nas Row, Inter Net, USA
Posts: 3,285
Registry
The hood not being as much of a heat sink will not hurt your engine. Long term it will be a little harder on the plastic parts I suppose? Nothing o worry about.

Did you use a roller on that?


I kind of mentioned this recently in another thread, that my experience with these products is that the trade off for sound dampening is water retention. That stuff looks like it will hold water like a sponge. Very very similar to Dynaliner by Dynamat. Not an issue for a show car or a hot rod but less than ideal for a defender. I believe this is why you never see this type material used on production cars, instead it's common to see a kind of molded shell that resembles fiberglass. In addition to absorbing sound and insulating against heat, it also absorbs water, but it dries much much more easily as one entire side is entirely exposed to the warm air moving around the engine.

If you can keep the edges totally dry you might be OK. But is ANY part of a defender body totally dry 100% of the time? My experience with dynaliner was that once it wicks up into the foam, even a little water will have a LOT of difficulty drying out. Maybe others have used it without this happening and can offer suggestions? Over time, enough water can build up until the point where the material weighs so much that the adhesive fails. In the meantime, you have a thick blanket of moisture across the entire underside of the hood. Don't forget that it is an aluminum skin over a steel frame. I guess it all comes down to how bad the engine noise bothers you.
__________________
Note: The maximum size of your custom image is 500 by 100 pixels or 19.5 KB (whichever is smaller).
Reply With Quote
  #3  
Old June 28th, 2013, 09:09 PM
Red90's Avatar
Red90
Status: Offline
John B.
1991 Defender 90, 200TDI
Site Team
 
Join Date: Sep 2003
Location: Calgary
Posts: 9,242
Registry
It will be fine. I've had a good li we for ten years. Nothing bad has happened.
__________________
Pissing people off on the "net" since 1983.

Land Rover. Turning owners into mechanics since 1948.
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old June 28th, 2013, 09:41 PM
silverlight's Avatar
silverlight
Status: Offline
Geoff
1993 Defender 110 NAS
Member
 
Join Date: Aug 2011
Location: NYState
Posts: 103
Good to hear the positive feedback, thanks gents. going to tinker around and do a little more soundproofing for fun. I did a beast of a sound proofing job in our daily driver for our family and it went from noisy and fatiguing on long trips to what seems like dead silence. HUGE project though and every time I addressed one area, it would reveal another... (and added enough weight that the car is a little biz slower)

In terms of water retention, I'm pretty good about driving in nice weather or only minor rain (it's a weekend only car), so should be pretty good on that front. Unfortunately where we keep the 110 there's not a lot of technical off roading or trail opportunities (a few rough municipal roads under power lines in the trees with only small hills), so generally don't submerge it either (which is not a good call w the NAS110 anyway).
Reply With Quote
  #5  
Old June 30th, 2013, 07:19 PM
Lemonhead
Status: Offline
TB
1997 D90 SW
Member
 
Join Date: May 2012
Location: NY
Posts: 310
I used the H-Liner on my hood as well. I cut it to fit inside the recessed areas. Cut down on noise and cut down a little heat - hood still gets warm. Though put a new Borla exhaust on a few weeks ago so not as quiet as before
Reply With Quote
  #6  
Old June 30th, 2013, 08:36 PM
Overlander's Avatar
Overlander
Status: Offline
mark kellgren
in between D's in an 04 D2
Member
 
Join Date: Mar 2006
Location: Charlotte, NC
Posts: 6,531
Registry
interesting. I did my bonnet with a different product but may be interested in redoing it with this. be interested to hear in someone with a TDI using this product.
__________________
Mark Kellgren
KM4BOR

ISIL and al qaeda can go F*ck themselves...
Reply With Quote
  #7  
Old June 30th, 2013, 08:40 PM
GuamPilot's Avatar
GuamPilot
Status: Offline
Mike & Carrie Wendt
1986 90 2.5NA
Member
 
Join Date: Mar 2013
Location: Guam & San Bruno
Posts: 605
Registry
Please post the part number and may I ask how much you paid?

Mike
Reply With Quote
  #8  
Old August 10th, 2013, 11:06 AM
Axel's Avatar
Axel
Status: Offline
jack
1987 Defender 110 5-door
Member
 
Join Date: Jun 2012
Location: birmingham, Al USA
Posts: 144
For what it's worth, I just did this too. I used the Roadkill stuff, which the local audio shops recommended. it was about $70 from Amazon. One sheet is not really enough for a Defender hood, if you do it seamless like silverlight (& I) did.

I first had the Noise Killer set from the UK. it's heavier & thicker, but I can't get it to stay on the hood, even with the 3M hood adhesive everyone recommends. (interestingly, I emailed Noise Killer about this & they recommended I not use any glue since it would fill up the pores, but there's really no way else to attach it to a hood. )When you feel that Noise Killer stuff you can understand why. But as a result, half of my Noise Killer hood treatment just fell off & is gone, so I added the sheet of Roadkill on top & am supplementing it with aluminum strips. Maybe there's a way to use galvanized chicken wire or something, but that's going too far. Noise Killer just can't stay on the hood I guess.

They do include a very heavy motor "mat" that one cable-ties to the underside of the hood. It feels like one of those lead blanket the dentist puts on you before an x-ray.

I have a 200TDi but haven't attached the newly-coated hood yet to be able to tell you a difference. i worried about the same thing as silverlight.
Reply With Quote
  #9  
Old August 10th, 2013, 01:20 PM
cgalpin's Avatar
cgalpin
Status: Offline
Charles Galpin
'94 D90 ST, '63 SeriesIIA
Site Team
 
Join Date: Jan 2004
Location: South Riding, VA
Posts: 11,625
Registry
Are the engine covers on newer cars more for sound deadening than looks (which I used to think they were for)? Maybe just laying a big ass rubber mat over the entire engine compartment would be effective?
__________________
Quote:
Originally Posted by pendy
I'm here for the D's
Reply With Quote
  #10  
Old August 10th, 2013, 01:47 PM
woldd90's Avatar
woldd90
Status: Offline
Scott
1997 D90 ST #1444
Site Team
 
Join Date: Aug 2005
Location: Georgia
Posts: 5,329
I think the big plastic covers are to keep people from working on their own cars...
__________________
Scott

Reply With Quote
  #11  
Old August 10th, 2013, 01:59 PM
leastonce's Avatar
leastonce
Status: Offline
Jason England
D-90 White 95 SW #65
Site Team
 
Join Date: Jul 2009
Location: NYC
Posts: 6,078
Registry
Quote:
Originally Posted by woldd90 View Post
I think the big plastic covers are to keep people from working on their own cars...
More likely to add a couple of hours onto the main dealer mechanics worksheet.
__________________
Quote:
Soapy water / KY jelly, etc. is is basically a must. Yes, good idea to remove trim panels - only takes 5 more minutes to do so.
Car Camping Collective founding member and Chief Executive Officer
Cat Camping Collective founding member and Chief Executive Officer
Reply With Quote
  #12  
Old August 10th, 2013, 04:02 PM
MonLand
Status: Offline
Loic Fabro
95 D90 - 96 Disco -06 LR3
Member
 
Join Date: Oct 2003
Location: Herndon, VA - USA
Posts: 1,642
Registry
Quote:
Originally Posted by cgalpin View Post
Are the engine covers on newer cars more for sound deadening than looks (which I used to think they were for)? Maybe just laying a big ass rubber mat over the entire engine compartment would be effective?
Lr3 covers definitely include more than just plastic. Now... The look has to be good too!
__________________
Quote:
I have an ex MoD and an ex wife. The two no longer conflict with each other.
Quote:
it is not hoarding it is selective collecting
---
MonLand
1995 D90 NAS
1996 Discovery NAS
2006 LR3 NAS (hers, but comfy! :) )
Reply With Quote
  #13  
Old August 10th, 2013, 04:09 PM
Ren Ching's Avatar
Ren Ching
Status: Offline
Skinny Pete
'84 90 "Yamelo"/'88 RRC "Chewbacca"
Member
 
Join Date: Mar 2007
Location: Downtown
Posts: 4,696
Registry
No, they are there to give you a convenient flat surface to put your foil-wrapped sandwich on so that it cooks while you drive.

Quote:
Originally Posted by woldd90 View Post
I think the big plastic covers are to keep people from working on their own cars...
Reply With Quote
Reply

Lower Navigation
Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions

Thread Tools

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
Sound Deadening Success... OCD90 Defender Technical Discussions 32 November 10th, 2012 09:44 PM
Fuel Pump Sound ronward Defender Technical Discussions 4 January 10th, 2005 07:45 AM
NEED side step Campbell Wanted 3 December 2nd, 2004 08:42 PM
Tapping sound from brakes? Cyborg Defender Technical Discussions 7 August 1st, 2004 08:57 PM
Weird sound at idle... OCD90 Defender Technical Discussions 1 November 10th, 2003 02:56 PM


All times are GMT -5. The time now is 03:30 AM.


Copyright