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Whitewaitress



Member Since: 26 Nov 2013
Location: Liverpool
Posts: 47
Whining sound when accellerating - engine related?
Morning All,

Yesterday after pulling off the dual carriage way and setting off at speeds up to 30mph I noticed through each gear a slight whining sound from what seems to be the left of the engine (when sat in the drivers seat).

I wasn't imagining things as today the noise is back! It does it while sat still, without being in gear / motion and will become more noticeable the higher up the rev range I go. Although, it didn't do it until the engine was up to temperature.

It sounds like a rotational whine, but I've not got a clue where in the engine bay it is coming from. Big Cry

Any suggestions?
Post #341123 27th Jun 2014 7:08am
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110 John



Member Since: 11 Jan 2014
Location: Northumberland
Posts: 158
United Kingdom 2009 Defender 110 Puma 2.4 XS CSW Orkney Grey
Is it not turbo whistle
Post #341127 27th Jun 2014 7:17am
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Whitewaitress



Member Since: 26 Nov 2013
Location: Liverpool
Posts: 47
If it is, it's not sounded like that for the last 18 months Laughing

The gasket between the inlet manifold and where the EGR pipework comes up needs replacing, which has a slight hissing sound. If this has worsened could that be the cause?
Post #341129 27th Jun 2014 7:23am
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 17365
United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
Water pump, vacuum pump, fuel pump, power steering pump, and EGR valve are all on the left of the engine and could whine, but it is notoriously difficult to 'place' sounds accurately from the driver's seat. Alternatively it could be the anciliary drive belt or one of its many many pulleys or bearings.

It could also be from a loose exhaust manifold or leak from the joint between the manifold and turbo. Such leaks can make a wierd assortment of unexpected sounds, as can a leak from the turbo-to-intercooler or intercooler-to-manifold hoses.

There are many things that can whine on a Puma Defender!
Post #341139 27th Jun 2014 8:23am
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Whitewaitress



Member Since: 26 Nov 2013
Location: Liverpool
Posts: 47
Cheers blackwolf - I've just run it out now that it has cooled and the whine is not there - it's definitely occuring only while the engine is hot. Does this suggest air temp related issues that may point towards a vacuum leak?
Post #341149 27th Jun 2014 9:56am
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 17365
United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
It would point me more towards an exhaust manifold leak. Check that the front-most nuts securing the manifold to the block (really inaccessible unfortunately) are tight - mine work loose and need tightening about once a year.
Post #341150 27th Jun 2014 10:08am
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