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Whistle on accelerating
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jonno1
 


Member Since: 16 Jun 2010
Location: SW London
Posts: 717

United Kingdom 2016 Discovery 4 3.0 SDV6 HSE Lux Auto Santorini BlackDiscovery 4
Whistle on accelerating

I was wondering if anybody else has experience of this. When I accelerate from standstill there is a pronounced whistle most audible with the passenger window down a bit. The noise persists through 1 or 2 lower gears before receding. Seems to do it hot or cold. My first thoughts were turbo trouble but there is no untoward effect on performance, in fact the car goes really well. It's a MY14 with just 17000miles covered. Ideas and comments appreciated.
  
Post #155960111th Nov 2015 10:22 am
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NJSS
 


Member Since: 06 May 2009
Location: Catherington, Hampshire.
Posts: 10806

United Kingdom 2016 Discovery 4 3.0 SDV6 Landmark LE Auto Waitomo GreyDiscovery 4

Have you lifted the bonnet & run the engine; this may help.

It could be exhaust manifold gasket or split intercooler hose; hopefully not crossover pipe.

I presume it's still under warranty, so back to the dealer & line up a loan car?

NJSS
 Am I Gammon or Woke ? - I neither know nor care.

2016 Discovery 4 Landmark
2011 Mercedes Benz SL350 (R230)
1973 MG B GT V8 - 3.9L John Eales engine, 5 speed R380 gearbox, since 1975.
1959 MGA roadster - 1.9L Peter Burgess Engine - 5 speed gearbox
Past LRs - Multiple FFRs, Discos & a Series I - some petrol, some diesel,
none Electric or H2 fuel cell - yet.
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Post #155963011th Nov 2015 11:14 am
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jonno1
 


Member Since: 16 Jun 2010
Location: SW London
Posts: 717

United Kingdom 2016 Discovery 4 3.0 SDV6 HSE Lux Auto Santorini BlackDiscovery 4

Thank you for your comments NJSS. THe whistle is there only when the engine is under load, not noticeable when cruising or travelling very fast.
John
  
Post #155968311th Nov 2015 12:39 pm
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NiickJW
 


Member Since: 01 May 2014
Location: Kempsford, Gloucestershire
Posts: 489

United Kingdom 2012 Discovery 4 3.0 SDV6 XS Auto Santorini BlackDiscovery 4

I had a similar thing from passenger side of the engine. Only happened under load. It was fine at idle. Newbury 4x4 fixed it. They originally thought it was exhaust manifold but turned out to be a blown gasket on the ERG valve. So quicker and cheaper fix.
  
Post #155969311th Nov 2015 1:26 pm
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aljo
 


Member Since: 20 May 2007
Location: west sussex
Posts: 804

England 

If not the exhaust I would check the butterfly housing chamber where the egr pipes connect as I had a similar problem which Geoff spotted Thumbs Up
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Post #155980311th Nov 2015 5:05 pm
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jonno1
 


Member Since: 16 Jun 2010
Location: SW London
Posts: 717

United Kingdom 2016 Discovery 4 3.0 SDV6 HSE Lux Auto Santorini BlackDiscovery 4

Thanks guys for your help. Looks like this could be the direction to point the techs. Aljo and NiickJW what MY are your discos?
John
  
Post #155984311th Nov 2015 6:28 pm
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