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Trying to identify a noise
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martindg
 


Member Since: 24 Jun 2015
Location: Werrington, Staffordshire
Posts: 44

United Kingdom 2005 Discovery 3 TDV6 HSE Auto Zambezi SilverDiscovery 3

Mike, I've nearly decided to go for having it replaced, if I was totally convinced it would cure it I definitely would, I'm just not entirely sure.
I keep thinking of my mate who spent 1k a couple of weeks ago having the turbo changed to cure the same noise on his disco and it making no difference.
To make matters worse it was our local autobox specialists who diagnosed his problem as the turbo saying his autobox was fine, so its obviously not that easy to diagnose.
Decisions, decisions!
  
Post #153358423rd Sep 2015 8:07 am
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swoodley
 


Member Since: 21 Feb 2011
Location: Hampshire
Posts: 52

United Kingdom 2005 Discovery 3 TDV6 HSE Auto Tonga GreenDiscovery 3

Just thought I would add in my own experience, i have had a rattle when lifting off the accelerator and when running on half throttle (sounds like a babies rattle). I think it has done it for the last 4 years, just got used to the noise.
But, just had the torque converter changed this week and it has gone Thumbs Up the car feels sooo and sounds much better...
  
Post #15377421st Oct 2015 8:47 am
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martindg
 


Member Since: 24 Jun 2015
Location: Werrington, Staffordshire
Posts: 44

United Kingdom 2005 Discovery 3 TDV6 HSE Auto Zambezi SilverDiscovery 3

That's good to hear (no pun intended)!

My friend had taken his disco back to our local autobox specialists this week, and they were still doubtful it was caused by the converter, so this is just the kind of confirmation we needed.

Dont suppose they had any idea what was causing it?

I've spent a few days reading up on it, to me it seems most likely to be something to do with the stator or thrust bearings either side of it.

Did the noise on yours get worse over time?. I take it it didn't damage the box?

Thanks for the info
  
Post #15377491st Oct 2015 8:58 am
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swoodley
 


Member Since: 21 Feb 2011
Location: Hampshire
Posts: 52

United Kingdom 2005 Discovery 3 TDV6 HSE Auto Tonga GreenDiscovery 3

Didn't get any worse over time (although I just got used to it), but I have had a double flush of the gearbox and also had some Dr Tranny added, neither of which helped the noise but did stop the shudder and slip for a while.

Now it feels like new, can only just feel when the gears change, is super smooth.
  
Post #15377801st Oct 2015 10:10 am
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MattTheTall77
 


Member Since: 24 Oct 2013
Location: Lincs
Posts: 268

United Kingdom 2005 Discovery 3 TDV6 SE Auto Tonga GreenDiscovery 3

Booked off next Wednesday to try heading up to Martin Lowe for them to have a listen, will report back afterwards! Smile
  
Post #15378031st Oct 2015 11:20 am
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Weedyapl
 


Member Since: 24 Sep 2015
Location: Melbourne
Posts: 81

Australia 2005 Discovery 3 TDV6 HSE Auto Zambezi SilverDiscovery 3

Mine does this noise as well only whilst in gear, i had shuddering on purchasing the D3 with 170,000km so had a gearbox flush by ZF trans specialist and it has disappeared. Car had a flush at 80,000km with new sump and has been serviced by LR specialists since. I dont notice this in park/neutral but what i have noticed is engine cover is making a terrible loud rattling noise that disappears and reappears as you play with the throttle. It appears the hard plastic is touching the engine body on one side because the rubber spacers have dropped 5mm. Im going to remove it tonight and go for a drive to see if its that.

Sounds like its just a sign of a worn TC though from all the reading ive done although that doesnt explain the people who reported this noise on brand new D3's...

*Update* noise is still there very keen to see if anymore TC replacements fix it although ill just live with it i think if the TC is working fine...
 

Last edited by Weedyapl on 4th Oct 2015 10:00 am. Edited 1 time in total 
Post #15392034th Oct 2015 7:58 am
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Gilly1
 


Member Since: 09 Sep 2015
Location: Somerset burnham on sea
Posts: 359

England 2015 Discovery 4 3.0 SDV6 SE Tech Auto Fuji WhiteDiscovery 4

Very interesting, i also have the noise on the video, my first thought was turbo bearing or heat shield, working buy proses of elimination can be costly so will be nice to have answer, will keep reading/viewing with interest, I'm quite annel about noises and things working as they should so I have got to get it fixed or it will keep me awake at night. Shocked Very Happy
  
Post #15392084th Oct 2015 8:23 am
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Gilly1
 


Member Since: 09 Sep 2015
Location: Somerset burnham on sea
Posts: 359

England 2015 Discovery 4 3.0 SDV6 SE Tech Auto Fuji WhiteDiscovery 4

Spent hour or so under the car yesterday pulling/pushing/prodding and listening with a stethoscope, took a couple under trays off, the only place I could get any type of rattle sound was in the area circled in red, it's offside front inner wing area, above fuel filter and next to steering rack, I thought I might of been lucky because I noticed a heat guard bracket broke, located buy the yellow arrow, ( no chance if I didn't have bad luck I wouldn't have any luck) Rolling Eyes I moved the heat shield away from the bolt 10/20mm but noise/rattle was still there when took for a drive, car is going in to be looked at to see if they can diagnose it. Will update after..
  
Post #15400715th Oct 2015 7:07 pm
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MattTheTall77
 


Member Since: 24 Oct 2013
Location: Lincs
Posts: 268

United Kingdom 2005 Discovery 3 TDV6 SE Auto Tonga GreenDiscovery 3

Drove up to Martin Lowe this morning for them to have a look at the car. They took it out for a drive, lots of judder uphill at 30 so it was obvious the TC is an issue, but couldn't hear the noise, at all. Bloomin' typical! Rolling with laughter

Not sure if it was the rain and/or new tyres drowning it out, but on playing on the way home it was hard to try and purposely cause it. Will have to keep a listen out when dry again. They had listened to the youtube video I linked to them and they thought it may possibly be related to the EGRs.

As for the torque converter, they advised fixing the autobox at the same time. A very knowledgeable chap did show me some torque converters and plates, and talked about pressure and seals and why it is best to do both but it was a bit over my head tbh. I was surprised at how large the torque converters are!

As for prices, £2300+VAT (so £2760 inc) if the ECU can be re-used, otherwise more on top, but said it's very unlikely it can't be re-used.

Martin Lowe seem a great team of people, wouldn't hesitate to book the car in there. Just need to decide whether to fix it given everything else on the list, or just run it over winter and move on.
  
Post #15410127th Oct 2015 2:25 pm
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Gilly1
 


Member Since: 09 Sep 2015
Location: Somerset burnham on sea
Posts: 359

England 2015 Discovery 4 3.0 SDV6 SE Tech Auto Fuji WhiteDiscovery 4

update on noise....had car in garage and explained noise im getting, so mechanic took for test drive, he couldn't hear it so I had to take him out and he heard it, got back and he had listen under bonnet and in drivers side inner wheel arch, he seems to think its not serious but thinks it maybe alternator noise\bearing, then told me its one of them noises that you could change part after part until you find it,{no s**t Sherlock that's why I booked it in with you,lol, he said it def coming from alternator area and the sport and vogue are common for bad alternators, hopefully the noisy part will fail eventually and I can have it fixed but hopefully its not a serious fail. Big Cry
  
Post #15422979th Oct 2015 5:17 pm
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martindg
 


Member Since: 24 Jun 2015
Location: Werrington, Staffordshire
Posts: 44

United Kingdom 2005 Discovery 3 TDV6 HSE Auto Zambezi SilverDiscovery 3

If it's the same noise as on my car, I found it only makes it when in drive, so I reckon that would rule out an alternator bearing, also my test with the microphones would have located it in the engine bay, but I can understand why someone would think it sounds a bit like one.

In the past when I have had alternator, water pump or idler bearing problems (Disco 1 canary sound!) they have always been obvious when the engine is idling and being rev'd up slightly.

Dek.
  
Post #15423239th Oct 2015 6:12 pm
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Weedyapl
 


Member Since: 24 Sep 2015
Location: Melbourne
Posts: 81

Australia 2005 Discovery 3 TDV6 HSE Auto Zambezi SilverDiscovery 3

MattTheTall77 wrote:
Drove up to Martin Lowe this morning for them to have a look at the car. They took it out for a drive, lots of judder uphill at 30 so it was obvious the TC is an issue, but couldn't hear the noise, at all. Bloomin' typical!

As for the torque converter, they advised fixing the autobox at the same time. A very knowledgeable chap did show me some torque converters and plates, and talked about pressure and seals and why it is best to do both but it was a bit over my head tbh. I was surprised at how large the torque converters are!



Yeah definately sounds like a bad TC but i would still do a flush if you havent already. A&B in melbourne (ZF specialiststs) said if flush doesnt help its time for new TC and to reco trans.

If you do go down this route ask them if anything else was loose or broken in that area ive got a feeling this noise is not TC itself but something else in that area as it would explain a few problems i have with this being TC eg new D4s owners have apparently reported it and some people report this noise with no TC issues at all for over 250,000km! Its so common people have test driven multiple D3s and every single one did it even other new D3s when owners returned it to LR complaining of the noise only to have LR say its normal.

Whole thing screams manufactoring flaw to me
  
Post #154253410th Oct 2015 5:49 am
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longclose
 


Member Since: 07 Mar 2015
Location: Dorset UK
Posts: 234

United Kingdom 2008 Discovery 3 TDV6 HSE Auto Tonga GreenDiscovery 3

SWAMBO's D3 makes exactly the same noise (listened to the MP3). I thought as most od on this thread it was the transmission and had judder which was completely fixed by double flush and Dr Tranny as backup.

The noise was still there and both the main dealer and Indie said it was the EGR and not to worry, they said you can prove it by disconnecting the cable to the EGR though it may throw up a fault. Car is currently laid up in SA so will not be able to get back to test for a few weeks.

But the fact that the EGR operates mainly under light throttle (PWM controlling a stepper motor) is very likely to be the cause. Disconnecting the cable will prove it conclusively said the Indie, although on EU4 vehicles it will likely go into limp home mode.

Will try it myself when I get back down South in a few weeks.
 Owning a Discovery 3 is like dating a model.. a firm body and shape, wow.. the ride is fantastic >Very Happy for this your wallet can take a pounding and you worry about being deflated at any time...
2009 Model D3 HSE 
 
Post #154335912th Oct 2015 9:11 am
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Scwede
 


Member Since: 31 Jul 2014
Location: Jönköping, Sweden
Posts: 301

Scotland 2012 Discovery 4 3.0 SDV6 HSE Auto Sumatra BlackDiscovery 4

It seems unlikely - I have had my EGRs blanked and it's as loud as ever.

I initially thought it was the turbo but after reading all there is to read it seems most likely to be the TC.

I had judder when I bought the car 30,000 miles ago - added Dr Tranny which cured it then changed the gearbox oil. It's starting to judder again now so will add some more Dr T to buy time - but these symptoms along with consensus of opinion suggest the TC.

Cheers
 

Last edited by Scwede on 13th Oct 2015 11:53 am. Edited 1 time in total 
Post #154336312th Oct 2015 9:27 am
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longclose
 


Member Since: 07 Mar 2015
Location: Dorset UK
Posts: 234

United Kingdom 2008 Discovery 3 TDV6 HSE Auto Tonga GreenDiscovery 3

Blanking EGR's will not stop the noise as it will be the stepper motors which are still connected and operating as normal... try disconnecting the EGR connectors and see if the noise goes away.
 Owning a Discovery 3 is like dating a model.. a firm body and shape, wow.. the ride is fantastic >Very Happy for this your wallet can take a pounding and you worry about being deflated at any time...
2009 Model D3 HSE 
 
Post #154339612th Oct 2015 11:05 am
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