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JonnieR
Member Since: 22 Jan 2007
Location: Gloucestershire
Posts: 29
  
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| Funny throbbing noise / reverberating noise |
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I seem to get a funny noise that sounds like a feint throbbing / reverberating noise when my Disco 3 gets to about 45mpg. (The nearest noise I can compare it to, is when 2 large engines are meant to be running at the same speed but are slightly out of sync).
Can anyone explain what this might be? Sounds to me like something is rubbing? Perhaps a brake? I dont know, and its driving me mad. Plus I cant get my car to average more than 25mpg - I drive about 45 miles to work each day on pretty quiet roads, and I'm light footed.
Its not a loud noise, but now I've noticed it I'm going crazy.
Suggestions.
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 22nd Jan 2007 10:04 pm |
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DG
Site Moderator
Member Since: 12 Dec 2005
Location: The Gaff
Posts: 50979
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Does the noise stop when you take your foot of the accelerator or is it there all the time? 21 year LR veteran > D2 GS 2003 > D3 S 2006 > D3 HSE 2009 > D4 HSE 2013 > D4 HSE 2015 > D5 HSE 2018 > DS HSE R-Dynamic P300e 2021
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| 22nd Jan 2007 10:06 pm |
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Gareth
Site Moderator
Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26779
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What mileage is the car? are you on worn Goodyear Wranglers. These can start to make odd noises in the later stages of their life.
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| 22nd Jan 2007 10:12 pm |
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JonnieR
Member Since: 22 Jan 2007
Location: Gloucestershire
Posts: 29
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21000 miles, and on original rubber. Doesnt seem to be tyre noise, as they are still in pretty good shape. Yes they are the GY Wrangler tyres.
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| 22nd Jan 2007 10:30 pm |
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simon
Member Since: 11 Jan 2005
Location: Shropshire
Posts: 18296
 
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Does sound like your Wranglers... even with good tread the wear will appear to be stepped / angled. This will cause noise. I'd describe it more akin to bearing wear noise.
One thing to try is to swap them front to back and see if the sound moves. Thats supposing the noise is predominately from the rear.
Has happened to 2 sets on my D3 so far and all sets of Wranglers on the 3 Freelander's I've had.
Could be something else too of course.
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| 22nd Jan 2007 11:08 pm |
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IanD
Member Since: 11 Mar 2006
Location: (Too) close to Paris
Posts: 516
 
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| Re: Funny throbbing noise / reverberating noise |
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JonnieR wrote:when my Disco 3 gets to about 45mpg
It's your bank manager committing suicide 
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| 23rd Jan 2007 1:58 pm |
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Echidna
Member Since: 23 May 2005
Location: Edinburgh, Scotland
Posts: 16
 
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My TDV6 Auto, Pirelli Scorpians on 19" wheels with just over 15,000 miles is in at the dealer at the moment with exactly the same problem. I noticed it the day that I drove it off the forecourt. It went into the dealer the following week but was unable to diagnose after changing the wheels a couple of times. We decided to see if it was a "bedding in" thing that might go away with time. I am only averaging 22mpg when driving around town very light footed.
It has taken the dealer 18 months to finally diagnose. I have just been informed by the dealer that the differential is being replaced tomorrow (under warranty) although the dealer initially suspected the front brake discs.
E. 2005 TDV6 HSE Buckingham Blue / Alpaca
2005 TDV6 HSE Cairns Blue / Alpaca (Rejected)
2005 VW Golf SE
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| 13th Feb 2007 3:30 pm |
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stapldm
Member Since: 11 Sep 2006
Location: Swine Town
Posts: 2330
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As has been said above, most likely to be your tyres...however just in case here's another possibility: I did have an oscillation from my bonnet. The front left catch was slightly loose and allowed the whole bonnet to vibrate. I adjusted the rubber screw/bump stop under that side to tighten it up and that reverbrating noise (actually related to certain engine speed and load) went away. I found mine by very gently moving the bonnet corners up and down a minute amount - you could feel the click-click as it touched either side of the catch... Dr. Ian Malcolm:
"Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should."
Transgenic tomato anyone?
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| 13th Feb 2007 8:31 pm |
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Echidna
Member Since: 23 May 2005
Location: Edinburgh, Scotland
Posts: 16
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How interesting. I had noticed that my front left bonnet catch does not always engage correctly too. If it doesn't engage there is a distinct bonnet wobble and lifting at certain speeds. The dealer says that the noise I am reporting is definately the front diff though.
E. 2005 TDV6 HSE Buckingham Blue / Alpaca
2005 TDV6 HSE Cairns Blue / Alpaca (Rejected)
2005 VW Golf SE
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| 14th Feb 2007 12:07 pm |
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