 | Home > Technical > engine bay/bonnet soundproofing |
 
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| LandRoverAnorak Member Since: 17 Jul 2011 Location: Surrey Posts: 11240   
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I think that soundproofing a Puma bonnet is less worthwhile than earlier ones. It's much stiffer and doesn't resonate in the same way, which is what mass sound deadening materials are good at reducing. You can probably reduce transmitted sound externally with the right materials but for inside the cabin, treating the inside of the bulkhead will give much more benefit. Darren
110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak "You came in that thing? You're braver than I thought!" - Princess Leia |
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19th Sep 2020 9:13am |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 16858 
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Germany would be proud of that word! Gotta love smartphones!  |
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19th Sep 2020 9:48am |
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| grafty99 Member Since: 15 Aug 2012 Location: North Devon Posts: 4784 
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 2002 90 Td5 Station Wagon
1990 Vogue SE Triumph Tiger Explorer 1200 Td5 90 Thread http://www.defender2.net/forum/topic50767.html Tdi 110 Thread https://www.defender2.net/forum/topic69562.html RRC Thread http://www.defender2.net/forum/topic54492.html Instagram http://www.instagram.com/george_grafton |
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19th Sep 2020 9:54am |
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| rockster57 Member Since: 15 Nov 2014 Location: West Yorkshire Posts: 937 
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Frighteningly I read the original post without even registering it contained an example of Teutonic computerspeak  |
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19th Sep 2020 10:13am |
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| jaygti Member Since: 04 Nov 2012 Location: essex Posts: 375 
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I’m not sure soundproofing the bonnet will help, but when you open the vents the sound of the engine increases dramatically when stationary.
So it’s worth a try. 2002 td5 90 county hardtop |
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19th Sep 2020 10:17am |
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| Mo Murphy Member Since: 01 Jun 2008 Location: Letchworth Garden City, Herts Posts: 2077 
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Back to James question, does the self-adhesive anti drum stay stuck to the bonnet or does it pull itself off when it gets hot ?
Mo The Land Rover 90 - Many are called, few are chosen. |
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19th Sep 2020 11:04am |
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| T140 Member Since: 15 Mar 2016 Location: Ayrshire Posts: 163  
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i have done mine with silent coat and foam there is not a huge improvement in normal driving but a huge improvement with the vents open you can barely hear the engine, it was done a year (8k miles) or so ago and has not come loose nobody is perfect but being Scottish is a start
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19th Sep 2020 11:33am |
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| Mo Murphy Member Since: 01 Jun 2008 Location: Letchworth Garden City, Herts Posts: 2077
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Excellent news T140. I have an early bonnet and you can see as well as hear it drum.
Mo The Land Rover 90 - Many are called, few are chosen. |
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19th Sep 2020 12:05pm |
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| macfrank Member Since: 05 Nov 2015 Location: somewhere in the north Posts: 986  
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 why waste a whole sentence when one word does it
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19th Sep 2020 4:31pm |
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| MatLandy Member Since: 11 Sep 2020 Location: Paris Posts: 176 
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A year ago I added some Dynamat Hoodliner to mine, it is still in place, no problem.
If you want it to stick in place for a while, there a 2 rules: - Degrease, and degrease again before applying ! - Do not go wading bonnet deep or it may soak water and come loose with increased weight Also, as it is about 2cm thick, I had to trim it in some areas to avoid it getting in contact with the engine. Regarding noise benefit: it is not worse! and when it comes to soundproofing, I believe every little bit counts. So after too many days/nights spent on soundproofing the interior I just thought I could take 1 hour to treat the bonnet. In my case, it was changing the bonnet hinges that actually suppressed the bonnet vibrations towards the cabin and made a very welcome improvement. I used the Nakatanenga ones with PU bushes, thus avoiding any metal to metal contact. https://www.nakatanenga.de/en/optional-equ...anti-theft /Mat  Click image to enlarge Click image to enlarge |
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20th Sep 2020 6:51pm |
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| jst Member Since: 14 Jan 2008 Location: Taunton Posts: 7682 
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Great, thank you everyone for comments. Doesn't seem to make that much of a difference then by the sounds of it! Cheers
James 110 XS Utility 130 Puma Station wagon/camper (in the making) 90 Puma Hardtop |
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20th Sep 2020 7:07pm |
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| Hufflepuff Member Since: 25 Oct 2014 Location: Hampshire Posts: 723  
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Had it put on mine (td5), and I can't tell any difference, which in fairness the fitter did indicate would be the case.
It should protect the bonnet paint from a bit of engine heat though, if that is a concern to you? 2005 Td5 90 XS 1989 V8 110 CSW |
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22nd Sep 2020 9:01pm |
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