I was wondering if anyone has tried improving the sound insulation on their diesel engine bay to help minimise the traditional diesel rattle. I have seen 'noise killer' sound padding used on underbonnets and am not sure if they would be better or worse than the Land Rover current design.

I have a late 2004/05 model, and maybe the newer models have better insulation parts that can be retrofitted.

Any thoughts are welcome. Tom

Current Drive
2011 4.4 TDV8 Autobiography - Santorini Black - Ivory Leather

Previous Drives
2004 Model Vogue Td6 (Touchscreen) - Java Black - Parchment Leather
1994 RR Classic 3.9 V8 Soft dash - Niagara Grey - Grey Leather
1972 Series III SWB Safari - Green (Hand Painted) - Black Plastic

06 onwards models have a huge amount of sound deadening inside interia panels... Go to a breakers yard?

I installed it all in my 04 TD6 and it made quite a difrence... Then I bought an SC and that worked better...




Craig

Nice one Craig, I will head down to one to see what I can find.

If anyone has a pic of their 06 engine bay of these insulation panels so I can see which ones to nab that would be greatly appreciated. Tom

Current Drive
2011 4.4 TDV8 Autobiography - Santorini Black - Ivory Leather

Previous Drives
2004 Model Vogue Td6 (Touchscreen) - Java Black - Parchment Leather
1994 RR Classic 3.9 V8 Soft dash - Niagara Grey - Grey Leather
1972 Series III SWB Safari - Green (Hand Painted) - Black Plastic

Surely there is the factory insulation? You'll be hard pressed to squeeze any more in? Discovery 4 HSE
1998 110 TUM HS FFR Hard Top XD WOLF
1982 Series 3 Hard Top

*Gone:L462 D5 HSE LUX, L663 Defender 110 HSE, Discovery 3 HSE, 2014MY Range Rover Sport 5.0 Supercharged AB Dynamic; L405 Exec Vogue SE 4.4, 5.0 Supercharged Autobiography, Defender TDCi XS CSW, Defender TD5 HT, Vogue SE TDV8, Vogue TD6, RRSport SC 4.2V8, Classic 3.9 Vogue Auto, Land Rover Series 3 SWB

Plenty of room on top of the engine in a TD6, you could put in quite a thick layer of absorbent material full width which could be lifted out for maintenance.

Yep the TD6 has a lot of space in there, I could almost put in a whole duvet!

I would prefer something similar or the same as OEM design. It looks like the newer ones have a rubber seal running around the edge of the whole bay which would be a start. Not sure if the newer bonnet insulation is thicker or more extensive on the new ones. Tom

Current Drive
2011 4.4 TDV8 Autobiography - Santorini Black - Ivory Leather

Previous Drives
2004 Model Vogue Td6 (Touchscreen) - Java Black - Parchment Leather
1994 RR Classic 3.9 V8 Soft dash - Niagara Grey - Grey Leather
1972 Series III SWB Safari - Green (Hand Painted) - Black Plastic

It might be worth asking Duckworths Dan what the price is for the pukka 06 insulation/ rubber seals - I wondered if it was worth adding any more sound insulation, but the effort of removing the dashboard was too much to make it worthwhile!

I'll see if Dan has any info. It is more the insulation that quietens the car to outside that interests me, the insulation to the cabin is amazing already. I don't like waking up all my neighbours every time I start the car, so any improvement on the insulation is a bonus. I know it will never be that quiet, but the new diesels seem almost as quiet as the petrol versions. Tom

Current Drive
2011 4.4 TDV8 Autobiography - Santorini Black - Ivory Leather

Previous Drives
2004 Model Vogue Td6 (Touchscreen) - Java Black - Parchment Leather
1994 RR Classic 3.9 V8 Soft dash - Niagara Grey - Grey Leather
1972 Series III SWB Safari - Green (Hand Painted) - Black Plastic

These are great for sound deadening

^^^  Previously..
Vogue SE TD6
Defender 90 2.4
Defender 110 TD5
Vogue 3.5 EFI

It seems to me that most of the noise is coming from that whopping great 9 blade fan, not the engine. When I next have a play under the bonnet, I'm going to whip the fan out and take it for a quick run around the block to measure the difference in noise level - I think it would be quite noticable.

Not sure what to do about it though - maybe some thermo fans, but I doubt I'll get that carried away with it. With the windows up, I can live with it.

The fan should only make a noise when the engine is hot, could be the viscous coupling is kaput

The sound deadening material I used from the 06 model was all inside the car, behind panels etc etc... Sorry for any confusion...




Craig

47p2 wrote:

The fan should only make a noise when the engine is hot, could be the viscous coupling is kaput

My interest is in trying to deaden the normal diesel clatter noise. The bonnet has the stock factory fitted padding on the inside but I was wondering if the newer models have a thicker padding here and any other engine bay deadening rubber seals, covers etc that can be retrofitted.

There seems to be so much space free in the TD6 bay that absorbing padding etc must surely help keep the noise to the outside down, not too sure about under the engine, but over it might help. I will have a look for the rubber seals that seem to be on the SCs.

I have also seen noise killer blankets that are fitted over the engine they have a lead sheet covered in fire retardent foam and fabric. Anyone had any experience with them? Tom

Current Drive
2011 4.4 TDV8 Autobiography - Santorini Black - Ivory Leather

Previous Drives
2004 Model Vogue Td6 (Touchscreen) - Java Black - Parchment Leather
1994 RR Classic 3.9 V8 Soft dash - Niagara Grey - Grey Leather
1972 Series III SWB Safari - Green (Hand Painted) - Black Plastic