Sparkie
Member Since: 18 Mar 2008
Location: UK
Posts: 38
  
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| "Sucking" sound from engine on de-celleration |
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Hi All.
I have a sucking sound coming from the engine, usually on decelleration, but i have noticed it at constant revs on motorways as well.
Anyone any ideas? Everything seems ok, fuel useage normal, power normal etc.
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 25th Oct 2011 8:59 am |
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character
Member Since: 31 Dec 2007
Location: wiltshire
Posts: 5781
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got to be a hose of some sort, perhaps turbo hose so get down and dirty, take off the underside engine protector and have a careful look from underneath (putting it in off road height BUT turning off and removing the ignition key, oh and put a couple of chocks under the front and rear wheel to be on the safe side).
next, get some small steps, take off the top engine cover (the shrowd around the oil filler) and have a carefull look at the hoses towards the rear, then do the same towards the front.
In effect yer checking ALL rubber hoses for cuts 
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| 25th Oct 2011 9:27 am |
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jamesbond007
Member Since: 26 Jan 2010
Location: Algarve, Portugal
Posts: 263
 
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I have what I describe as a "hissing" sound when I come off the accelerator quickly after accelerating. my mechanic has not been able to find anything. The turbo hose has been changed recently. The older I get, the better I was.
Discovery 3 TDV6 Auto (BAS remap) after Defender TD4 110 Crew Cab and 1964 SIIA 88.
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| 25th Oct 2011 12:18 pm |
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abernanteagle
Member Since: 10 Aug 2011
Location: South Wales
Posts: 255
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jamesbond007 wrote:I have what I describe as a "hissing" sound when I come off the accelerator quickly after accelerating. my mechanic has not been able to find anything. The turbo hose has been changed recently.
I get this too. No idea what it is. Dec 04 TDV6 HSE in Tonga green with Alpaca interior.
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| 25th Oct 2011 12:24 pm |
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DiscoDunc
Member Since: 08 May 2006
Location: Bristol
Posts: 16390
  
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if its the same sucking (vacuum) noise that I get then Im told its the turbo wastgate and nothing to worry about. mines been doing it for years !! Duncan
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If I'd known I was going to be so thirsty this morning I'd have drunk more beer last night.
FFRR Autobiography 4.4 SDV8 MY17
D4 HSE MY13 SOLD
FFRR 3.6 Vogue TDV8 SOLD
D4 HSE MY10 SOLD
D4 SE TECH MY15 SOLD
D4 XS MY12 SOLD
D4 HSE MY10 SOLD
D3 HSE MY06 - Re-Cycled Worldwide
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| 25th Oct 2011 1:34 pm |
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Sparkie
Member Since: 18 Mar 2008
Location: UK
Posts: 38
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Thanks for your comments everyone.
I suppose that it could be described as a hissing sound, has been doing it for a long time now (2 years?) and i hoped that there may be a simple resolution. Oh well, it looks like i'll have to live with it then.
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| 25th Oct 2011 3:26 pm |
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Tawny Owl
Member Since: 22 Oct 2008
Location: Here and there
Posts: 1645
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Mine done this all the time until it had a new auto gearbox , since then nothing 
I could alway make the wooshing noise happen when coming off the pedal but not now.
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| 25th Oct 2011 3:29 pm |
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bambi
Member Since: 10 Apr 2009
Location: south yorkshire
Posts: 2059
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Looking at the vehicles affected they are all auto's, could it be a vacuum pipe to the auto box that is split damaged etc ?
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| 25th Oct 2011 4:35 pm |
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Sparkie
Member Since: 18 Mar 2008
Location: UK
Posts: 38
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Just to add to it, i can not get the hissing sound when the car is stationary on the drive, the car has to be moving. Also, it does not seem to happen when the car is cold, i never notice it setting off for work in the morning, but after a few miles, it's there.
Drive's the wife up the wall, not so much me as i'm pretty much used to it now!
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| 27th Oct 2011 7:30 am |
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DiscoDunc
Member Since: 08 May 2006
Location: Bristol
Posts: 16390
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sounds just like my symptoms - only at low speed as well.
it sounds like a vacuum noise, but then it also sounds like two bits of metal or something rubbing together.
I initially thought it was from the auto box but then someone said It was the wastegate.... Duncan
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If I'd known I was going to be so thirsty this morning I'd have drunk more beer last night.
FFRR Autobiography 4.4 SDV8 MY17
D4 HSE MY13 SOLD
FFRR 3.6 Vogue TDV8 SOLD
D4 HSE MY10 SOLD
D4 SE TECH MY15 SOLD
D4 XS MY12 SOLD
D4 HSE MY10 SOLD
D3 HSE MY06 - Re-Cycled Worldwide
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| 27th Oct 2011 8:56 am |
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jamesbond007
Member Since: 26 Jan 2010
Location: Algarve, Portugal
Posts: 263
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Sparkie wrote:Just to add to it, i can not get the hissing sound when the car is stationary on the drive, the car has to be moving. Also, it does not seem to happen when the car is cold, i never notice it setting off for work in the morning, but after a few miles, it's there.
Totally agree. Good comments! The older I get, the better I was.
Discovery 3 TDV6 Auto (BAS remap) after Defender TD4 110 Crew Cab and 1964 SIIA 88.
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| 27th Oct 2011 9:02 am |
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PaulP
Member Since: 04 May 2007
Location: Barcelona
Posts: 4317
 
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I also get this noise on overrun but I'm sure it wasn't there before - only really noticed it over the last year or so.
Dunc - there's no wastegate on the TDV6 turbo  2006 Discovery 3 TDV6 SE Auto Buckingham Blue
2007 Golf GT DSG
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| 27th Oct 2011 9:12 am |
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DiscoDunc
Member Since: 08 May 2006
Location: Bristol
Posts: 16390
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Mmm interesting - im no technician so just passing on what I was told - cant remember who told me but its been mentioned a few times !!
back to the gearbox theory then. B  r, I'll need to start worrying about that now  Duncan
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If I'd known I was going to be so thirsty this morning I'd have drunk more beer last night.
FFRR Autobiography 4.4 SDV8 MY17
D4 HSE MY13 SOLD
FFRR 3.6 Vogue TDV8 SOLD
D4 HSE MY10 SOLD
D4 SE TECH MY15 SOLD
D4 XS MY12 SOLD
D4 HSE MY10 SOLD
D3 HSE MY06 - Re-Cycled Worldwide
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| 27th Oct 2011 9:18 am |
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DiscoDunc
Member Since: 08 May 2006
Location: Bristol
Posts: 16390
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just done a search on "wastegate" and there are lots of mentions
this one : http://www.disco3.co.uk/forum/topic59133.h...Bwastegate
Quote:It took me a while to get turbo off but it revealed a tiny crack in wastegate pivot which was enough to stop wastegate sealing off, consequently loosing boost until switched off and cooled down where the crack would close up.
Duncan
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If I'd known I was going to be so thirsty this morning I'd have drunk more beer last night.
FFRR Autobiography 4.4 SDV8 MY17
D4 HSE MY13 SOLD
FFRR 3.6 Vogue TDV8 SOLD
D4 HSE MY10 SOLD
D4 SE TECH MY15 SOLD
D4 XS MY12 SOLD
D4 HSE MY10 SOLD
D3 HSE MY06 - Re-Cycled Worldwide
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| 27th Oct 2011 9:22 am |
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jamesbond007
Member Since: 26 Jan 2010
Location: Algarve, Portugal
Posts: 263
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Hopefully this thread will lead to a diagnostic. The older I get, the better I was.
Discovery 3 TDV6 Auto (BAS remap) after Defender TD4 110 Crew Cab and 1964 SIIA 88.
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| 27th Oct 2011 9:23 am |
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