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vaucluse



Member Since: 04 Feb 2012
Location: SE London
Posts: 185
2007 Defender 110 Puma 2.4 SW Java Black
Occasional air release noise when slowing down
I have recently been experiencing an occasional noise, probably best described as a sqeaky air release type noise, when braking and slowing down. It has only started to occur over the last two weeks and will only happen once or twice over short journey (about 30 mins).

I'm struggling to hear where it's coming from as it isn't very loud and only lasts for a half second.

Any idea fellas?

Thanks,

Mark
Post #462294 11th Oct 2015 3:15pm
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AndyS



Member Since: 18 Aug 2012
Location: London
Posts: 595
United Kingdom 2011 Defender 110 Puma 2.4 XS CSW Sumatra Black
How long does the noise last for, a fraction of a second or longer?

Two initial guesses, the turbo dump valve venting off any boost when you lift off the throttle or squeeky brakes.
Post #462295 11th Oct 2015 3:22pm
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vaucluse



Member Since: 04 Feb 2012
Location: SE London
Posts: 185
2007 Defender 110 Puma 2.4 SW Java Black
Hi Andy,

It's only a fraction of a second and I'm pretty sure it's not the brakes unless I have a leak with the servo.

The dump valve on the turbo sounds more likely- where about is it located and how is it supposed to function?

It's not something I had before over the four years I've had he truck.

Mark
Post #462298 11th Oct 2015 3:28pm
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Fifth Horseman



Member Since: 08 Mar 2011
Location: Lanarkshire
Posts: 322
United Kingdom 2011 Defender 110 Puma 2.4 XS CSW Santorini Black
No dump valve on the TDCi - when fitted it is to petrol turbocharged engines to reduce overboost / compressor stall when the throttle is closed. (Diesel engines do not use a throttle valve for controlling engine speed)

The noise you are hearing could be one of several things,
EGR valve starting to die,
Air leak in the inlet system - check the hoses and jubilee clips.
Post #462475 12th Oct 2015 7:40am
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