Member Since: 14 Jan 2017
Location: Liverpool
Posts: 88
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
28th Jul 2021 2:40 pm
Kilovolt
Member Since: 29 Jun 2015
Location: South Derbyshire
Posts: 1070
£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.
"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
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)
28th Jul 2021 3:32 pm
beerbelly
Member Since: 07 Sep 2020
Location: teesside
Posts: 87
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
29th Jul 2021 5:57 am
eightfoot
Member Since: 12 Apr 2015
Location: sunny essex
Posts: 806
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 friendplease excuse any grammer/punctuation mistakes,i'm thick,thankyou
current vehicles 2005 d3 2013 d4
29th Jul 2021 8:49 am
webego
Member Since: 06 May 2015
Location: Bromley
Posts: 331
This sounds just like my issue. Do you have any more details on that recall or what the actual cause was?
18th Sep 2021 7:52 pm
eightfoot
Member Since: 12 Apr 2015
Location: sunny essex
Posts: 806
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/rplease excuse any grammer/punctuation mistakes,i'm thick,thankyou
current vehicles 2005 d3 2013 d4
19th Sep 2021 8:29 am
webego
Member Since: 06 May 2015
Location: Bromley
Posts: 331
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?
19th Sep 2021 10:43 am
eightfoot
Member Since: 12 Apr 2015
Location: sunny essex
Posts: 806
centre box is under front pass seat (assuming its not been removed)
get someone to press down on the n/s end silencer to see if the noise goesplease excuse any grammer/punctuation mistakes,i'm thick,thankyou
current vehicles 2005 d3 2013 d4
19th Sep 2021 12:12 pm
Davethegeo
Member Since: 01 Oct 2015
Location: Edinburgh
Posts: 914
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
19th Sep 2021 12:44 pm
webego
Member Since: 06 May 2015
Location: Bromley
Posts: 331
Quote:
a well placed blow with a plastic faced mallet on the rattley silencer
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?
19th Sep 2021 9:57 pm
webego
Member Since: 06 May 2015
Location: Bromley
Posts: 331
FYI, applying some pressure with my foot to the n/s rear silencer did indeed mostly stop the noise.
19th Sep 2021 10:44 pm
eightfoot
Member Since: 12 Apr 2015
Location: sunny essex
Posts: 806
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 silencerplease excuse any grammer/punctuation mistakes,i'm thick,thankyou
current vehicles 2005 d3 2013 d4
20th Sep 2021 8:43 am
webego
Member Since: 06 May 2015
Location: Bromley
Posts: 331
I've ran my hands around the back of those two boxes 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.
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
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.
