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mohnwalk
Member Since: 07 Oct 2013
Location: The wilderness
Posts: 205
  
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Guys, I have recorded my sound from engine when I accellerate. I suspect the turbocharger as the sound comes when turbopreassure is building up and decreases when stepping off the accellerator. As I mentioned earlier, I can only hear the sound in the turbopreassure area. And when cold engine the sound is WORSE!
My wife took the car for a run yesterday and I was outside and heard her taking off... WOW  - what a loud sound when cold!!
Cheked my faultcodes, but none related to engine and turbo.
What you guys think?
Here it is:
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 26th Feb 2016 8:37 am |
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mohnwalk
Member Since: 07 Oct 2013
Location: The wilderness
Posts: 205
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Any thoughts on this noise?
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| 28th Feb 2016 12:27 am |
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mohnwalk
Member Since: 07 Oct 2013
Location: The wilderness
Posts: 205
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I can mention that I have changed the IC hoses a while back, the long and midle one, not the last small one closest to turbo. The long one had a big crack at the typical spot. I replaced them with silicon hoses. Could a leak at one of these cause this loud whistle noise?
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| 28th Feb 2016 3:51 pm |
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Aerialmark
Member Since: 21 Jun 2015
Location: Burnley (Where the M65 is cobbled)
Posts: 5191
 
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Aerialmark wrote:I had the same noise (more noticeable between buildings and narrow lanes) then I had the TC repaired with a new one and the noise has gone altogether 
Had the gearbox reconned 3 or 4 months ago with yet another new torque converter and in the last few days the noise is back 
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| 28th Feb 2016 7:34 pm |
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Valhalla
Member Since: 23 Oct 2011
Location: Isle of Skye
Posts: 124
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Hi Guys,
I have listened to one of the recordings a couple of pages back, and the noise on that MP3 sounds just like a failing crossover pipe. This part has a double-skinned construction which can fail or be stressed on the internal skin, often through excessive temperature of the exhaust gas passing through the crossover pipe. This single component is the weakest link for the exhaust manifolding tolerance to temperatures on TDV6 units - so is the first bit to fail if the engine gets a "tune-up" or has a fault that otherwise raises the gas temperatures.
There are two ways to get around the problem, if I'm right. One is to turn the radio up, the other is to get the body lifted and have a new pipe.
The noise can be mitigated from failing crossover pipes if the flanges/mounts are slackened and the pipe is forced to adopt a very subtly different shape from before, which separates the two skins, but this ignores the problem of the internal skin potentially shedding shards of metal through the turbine housing / wheel. Changing the turbo sometimes "fixes" the problem, because the exhaust manifold can be deflected slightly (and hence shift the end of the crossover pipe) by doing the support bracket fixings in the wrong sequence.
HTH
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| 26th Mar 2016 12:06 am |
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kayble
Member Since: 01 Aug 2015
Location: Lincolnshire
Posts: 147
 
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mohnwalk wrote:Guys, I have recorded my sound from engine when I accellerate. I suspect the turbocharger as the sound comes when turbopreassure is building up and decreases when stepping off the accellerator. As I mentioned earlier, I can only hear the sound in the turbopreassure area. And when cold engine the sound is WORSE!
My wife took the car for a run yesterday and I was outside and heard her taking off... WOW - what a loud sound when cold!!
Cheked my faultcodes, but none related to engine and turbo.
What you guys think?
Here it is:
Hello - this sounds 100% like a loose jubilee clip/ split on one of the IC hoses. I had exactly this noise when I had to remove/replace my rad/IC and didn't completley tighten the IC hose jubilee clip on the intake side of the IC.
In reality what was happening was that the loose IC hose clip had exposed a split in the IC hose, directly underneath the clip, and boost pressure was bleeding through the split so it sounded constantly like a balloon deflating!
Cure was to replace the damaged hose with a silicone unit - now all is good (for the moment).
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| 26th Mar 2016 10:24 am |
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kayble
Member Since: 01 Aug 2015
Location: Lincolnshire
Posts: 147
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Was there any feedback on this noise? my money is on a loose IC Hose/clip.
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| 10th Apr 2016 7:42 pm |
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maplecottage
Member Since: 01 Feb 2011
Location: Norfolk
Posts: 3171
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Just had my TC replaced and the 'noise' (which has bugged me for 3 years) is now gone. Fingers crossed I don't have to report back as AerialMark has done recently 
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| 20th May 2016 3:00 pm |
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JayKay696
Member Since: 27 Jul 2013
Location: George
Posts: 17
 
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Ok, so from reading the whole thread it looks like the TC is the source of this noise.
Exact same sound as on martindg mp3, driving me up the wall, cars driving next to me looking at me with a 'shame, should have a bought a Toyota" look. Constantly feathering throttle to try avoid noise when driving in traffic. Seems to be getting worse, not louder, but more prevalent through wider range of speeds
So far this is what has been done to get rid of this noise:
1. front wheelbearings;
2. front discs/pads (they thought is might be scraping noise somewhere around the disc);
3. recon rear diff
After dealer and indie drove with electronic stethoscope they agreed it to be the front diff,
4. recon front diff;
then after more deliberation:
5. left front driveshaft/cv;
then after more guessing:
6. all pipes changed to silicone (possible hole/tear causing suction sound)
then:
7. intercooler (possible leak causing suction sound)
8. checked all heatshields for loose mountings or fixings.
9. Diagnostics apparently show no faults.
Now they say, most LR's do that, nothing they can do about it further.
Bottom line is, I cannot now afford to replace the TC with new. Everywhere i read advise is to not get a recon TC, will not last.
So as temporary fix I am going to try the ATF Protectant additive and Dr. Tranny.
My question is: Do i use just one tube (2oz) of Dr. Tranny and one bottle (10oz) of the ATF Protectant with the ATF.
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| 28th Jun 2016 4:48 pm |
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maplecottage
Member Since: 01 Feb 2011
Location: Norfolk
Posts: 3171
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FWIW - Dr T did nothing to dampen the noise on mine.
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| 28th Jun 2016 7:10 pm |
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the admiral
Member Since: 19 Oct 2015
Location: South east ,swale
Posts: 170
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have recently had my box and new TC fitted in april. I did not have the noise before , faults on box went and everything is smooth.
But I have the noise now ! it only happens when I lift of the accelerator at any speed. no noise when in neutral or park. did notice it only starts once the car temp has increased slightly. first pull away and a few junctions no noise then it appears. D3 HSE 57 Buckingham Blue
box re-build
new TC
common sense is not common
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| 29th Jun 2016 7:11 am |
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RomP
Member Since: 19 Aug 2016
Location: Centurion, Gauteng
Posts: 7
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JayKay696 wrote:Ok, so from reading the whole thread it looks like the TC is the source of this noise.
Exact same sound as on martindg mp3, driving me up the wall, cars driving next to me looking at me with a 'shame, should have a bought a Toyota" look. Constantly feathering throttle to try avoid noise when driving in traffic. Seems to be getting worse, not louder, but more prevalent through wider range of speeds
So far this is what has been done to get rid of this noise:
1. front wheelbearings;
2. front discs/pads (they thought is might be scraping noise somewhere around the disc);
3. recon rear diff
After dealer and indie drove with electronic stethoscope they agreed it to be the front diff,
4. recon front diff;
then after more deliberation:
5. left front driveshaft/cv;
then after more guessing:
6. all pipes changed to silicone (possible hole/tear causing suction sound)
then:
7. intercooler (possible leak causing suction sound)
8. checked all heatshields for loose mountings or fixings.
9. Diagnostics apparently show no faults.
Now they say, most LR's do that, nothing they can do about it further.
Bottom line is, I cannot now afford to replace the TC with new. Everywhere i read advise is to not get a recon TC, will not last.
So as temporary fix I am going to try the ATF Protectant additive and Dr. Tranny.
My question is: Do i use just one tube (2oz) of Dr. Tranny and one bottle (10oz) of the ATF Protectant with the ATF.
Jay Kay,
Any feedback on the additives...I'm battling with same issues and ne TC here are just unaffordable, but common sense point to a TC replacement as the only fix...
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| 20th Aug 2016 7:42 pm |
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IOM man
Member Since: 03 Nov 2013
Location: Peel
Posts: 303
  
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I had a recon torque converter fitted last week by a LR dealer (I supplied the parts) and my rattling when releasing the throttle and resonance/droning noise has now gone + the no more judder - all is quiet, smooth and my fuel consumption has improved 
Auto box oil changes and a few Dr T injections didn't take the noise away but did hold the the judder off for 12 - 18 months Current:
2010 Discovery 4 HSE TDV6
2020 Audi Q2 TSFI 40 Aline Quattro Black Edition
2006 Audi RS4 4.2 V8 - Toy in the garage 
Gone but not forgotten:
2006 Range Rover Sport HSE TDV6
2018 Lexus NX 300 F Sport Hybrid
2005 Discovery 3 HSE TDV6
2015 Discovery HSE Lux
200 Discovery TDI
300 Discovery TDI
Land Rover 90 2.5 Diesel
Series III SWB Land Rover 2.25 diesel
TD4 Freelander Kalahari
1.8 petrol Freelander
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| 20th Aug 2016 8:01 pm |
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fqpvr6
Member Since: 29 Aug 2016
Location: Turin
Posts: 9
 
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MattTheTall77 wrote:Here you go martindg, mp3 converted to youtube vid
bah, chopped loads off, back in a few minutes lol
Should be sorted now
Same exact noise on my 2007 Disco 3 Auto, with 95 k miles. I am reading the whole thread and it appears everyone is pointing at the TC. I had already ruled out the turbo as not being the source. Did anyone get any benefit with the anti chatter additives? If so could you post the product you used? It is worth a try. Also... I know this is not the right post but are there any links to typical idle engine noise on somewhere on the forum? I get a ticking noise that is most pronounced from the passenger side wheel arch only after the engine is warm. It is directly associated to the engine RPM.
Thank you very much!
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| 30th Aug 2016 11:41 pm |
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Weedyapl
Member Since: 24 Sep 2015
Location: Melbourne
Posts: 76
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As someone who has had a reman trans and TC installed in the last 9 months i can say if your expecting to have ALL of this metal/chattering noise disappear afterwards your prob gonna be disappointed.
I still have noise coming from the front left passenger side of engine bay but i put it down to turbo noise. The very loud grinding noise from underneath the car however has gone.
Personally im of the belief if your TC clutches got to a point they were badly worn there is a strong possibility it would have over heated the oil enough to damage your trans as well. You have no way to tell if thats the case either without pulling the transmission apart. If you go cheap route and your trans fails later on your gonna need to pay for all that labour and ATF again plus a reman trans/TC.
If your TC is not shuddering and your transmission is not slipping (when warm-hot) and you are keeping your transmission appropriately serviced every 60-80,000km or so. Stop worrying about it, ignore it and continue saving for other parts 
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| 1st Sep 2016 7:47 am |
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