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Rattling catalytic convertor
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RRH
 


Member Since: 14 Jan 2017
Location: Liverpool
Posts: 87

United Kingdom 2010 Discovery 4 3.0 TDV6 HSE Auto Barolo BlackDiscovery 4
Rattling catalytic convertor

Hi all, our 2010 D4 has developed an annoying tinkling sound from the rear of the engine bay.
Our regular LR man tells me it’s a bracket on the cat and c£1k replacement exhaust is the answer.

Any experiences?

Thanks
  
Post #224390928th Jul 2021 2:40 pm
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Kilovolt
 


Member Since: 29 Jun 2015
Location: South Derbyshire
Posts: 1017

United Kingdom 2013 Discovery 4 3.0 SDV6 Commercial XS Auto Baltic BlueDiscovery 4

£1k my foot.

Whilst working safely, perhaps take it from the car to avoid a fuel fire etc, find a man who knows his welding and re-attach the bracket.

Thumbs Up
 "Track day running - Don't put your foot back on the accelerator until your absolutely sure you don't have to take it off again"

Current Ride: D4 XS Commercial Baltic Blue SDV6 fully loaded with heated everything Smile
Track Days: BMW E36 M3 Evolution MY 1996 (3.2 Litre 377 BHP sat in 1,250 Kgs of car, with a pro safety cage and some serious braking power) Smile 
 
Post #224392328th Jul 2021 3:32 pm
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beerbelly
 


Member Since: 07 Sep 2020
Location: teesside
Posts: 87

United Kingdom 2012 Discovery 4 3.0 SDV6 XS Auto Orkney GreyDiscovery 4

mine had a tinkling noise on tickover that went away if i picked the revs up turned out it was the aux belt tensioner bearing had fell apart and the pulley was all squint
  
Post #224401629th Jul 2021 5:57 am
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eightfoot
 


Member Since: 12 Apr 2015
Location: sunny essex
Posts: 760

United Kingdom 2005 Discovery 3 TDV6 S Auto Bonatti GreyDiscovery 3

there was also a tec recall for the centre silencer box that rattles when at idle managed to get mine done but was hard work even though i had just purchased it from l/r dealer approved (apparently) sounded like a noisy air suspension compressor

search is your friend
 please excuse any grammer/punctuation mistakes,i'm thick,thankyou
current vehicles 2005 d3 2013 d4 
 
Post #224404429th Jul 2021 8:49 am
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webego
 


Member Since: 06 May 2015
Location: Bromley
Posts: 331

England 2012 Discovery 4 3.0 SDV6 Base 7 Seat Auto Orkney GreyDiscovery 4

This sounds just like my issue. Do you have any more details on that recall or what the actual cause was?
  
Post #225211118th Sep 2021 7:52 pm
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eightfoot
 


Member Since: 12 Apr 2015
Location: sunny essex
Posts: 760

United Kingdom 2005 Discovery 3 TDV6 S Auto Bonatti GreyDiscovery 3

you could hear mine if you got under the car with it running,i found that if you pressed down on the rear silencer it would go away

as for the recall l/r where not at all helpful but i only had the car for 1 day when the problem appeared and got if fixed under used approved although i virtually had to reject the car to get anywhere as l/r insisted exhaust wasn't covered under used approved

i wasn't happy with the repair as the std exhaust is one peace and the repair consisted of a replacement centre box that was cut and clamped in place (£800 it was) but its been ok for nearly 3 yrs now but typical poor l/r cust service left a real bad purchase taste that will come back in my throat every time i visit a l/r dealership

the problem is baisically the baffle plates inside the silencer come loose and vibrate at idle you could try squashing the box with some sort of clamp for a temp repair and look for a used box as theres plenty of spares available online and i think you can buy the clamps from l/r
 please excuse any grammer/punctuation mistakes,i'm thick,thankyou
current vehicles 2005 d3 2013 d4 
 
Post #225217219th Sep 2021 8:29 am
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webego
 


Member Since: 06 May 2015
Location: Bromley
Posts: 331

England 2012 Discovery 4 3.0 SDV6 Base 7 Seat Auto Orkney GreyDiscovery 4

Hmm, I will have another look and see if it is that specifically. The noise mostly comes from under the nearside doors rather than the back. Can you remember if it made the whole exhaust vibrate?
  
Post #225220719th Sep 2021 10:43 am
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eightfoot
 


Member Since: 12 Apr 2015
Location: sunny essex
Posts: 760

United Kingdom 2005 Discovery 3 TDV6 S Auto Bonatti GreyDiscovery 3

centre box is under front pass seat Thumbs Up (assuming its not been removed)

get someone to press down on the n/s end silencer to see if the noise goes
 please excuse any grammer/punctuation mistakes,i'm thick,thankyou
current vehicles 2005 d3 2013 d4 
 
Post #225221919th Sep 2021 12:12 pm
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Davethegeo
 


Member Since: 01 Oct 2015
Location: Edinburgh
Posts: 876

Scotland 2014 Discovery 4 3.0 SDV6 HSE Auto Corris GreyDiscovery 4

I had the same thing in my MY2012. Noisy rattle at idle but just needed a blip on the gas to change the engine speed and it stopped resonating. The permanent fix was a combination of loosening the exhaust clamps and twisting the joints ever so slightly AND a well placed blow with a plastic faced mallet on the rattley silencer. Never heard a peep from it after that.
 D1 300Tdi - gone
D2 Td5 ES (Alive remapped...mmm) - sadly gone
D4 2012 SDV6 XS - Stolen
D4 2014 SDV6 HSE - Shiny


 
 
Post #225222519th Sep 2021 12:44 pm
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webego
 


Member Since: 06 May 2015
Location: Bromley
Posts: 331

England 2012 Discovery 4 3.0 SDV6 Base 7 Seat Auto Orkney GreyDiscovery 4

Quote:
a well placed blow with a plastic faced mallet on the rattley silencer
Laughing

Thanks for that info gents. I'm going to try that right now.

@eightfoot By centre box, do you mean this?



If yes, which of those two boxes was making the noise? The funny looking one or the other?
  
Post #225232619th Sep 2021 9:57 pm
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webego
 


Member Since: 06 May 2015
Location: Bromley
Posts: 331

England 2012 Discovery 4 3.0 SDV6 Base 7 Seat Auto Orkney GreyDiscovery 4

FYI, applying some pressure with my foot to the n/s rear silencer did indeed mostly stop the noise.
  
Post #225233419th Sep 2021 10:44 pm
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eightfoot
 


Member Since: 12 Apr 2015
Location: sunny essex
Posts: 760

United Kingdom 2005 Discovery 3 TDV6 S Auto Bonatti GreyDiscovery 3

if its noisy all the time at idle just put your ear near each one to see which one needs a clump it will be obvious

ps you sure its not the heat guard on the silencer or covering the prop thats loose or above the rear silencer
 please excuse any grammer/punctuation mistakes,i'm thick,thankyou
current vehicles 2005 d3 2013 d4 
 
Post #225240120th Sep 2021 8:43 am
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webego
 


Member Since: 06 May 2015
Location: Bromley
Posts: 331

England 2012 Discovery 4 3.0 SDV6 Base 7 Seat Auto Orkney GreyDiscovery 4

I've ran my hands around the back of those two boxes Shocked and it is all clear, no contact with the heat shield so far as I can tell. I'll get the camping mallet out and ready and have a proper listen later. If I can narrow it down, I'll give it a whack and see if it helps. Otherwise, I'll just keep an eye out on the bay for a used centre section, nothing doing right now.
  
Post #225244820th Sep 2021 12:46 pm
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