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Marky Boy

Member Since: 25 Oct 2013
Location: Maidenhead
Posts: 96

High pitched whistle under load

Hi All,
Ok as above, another high pitched whistle question ! I have a 110 CSW with a Stage 1 Alive map and thought that my new high pitched whistle may be coming from the exhaust manifold. However, the manifold does not show any signs of soot around 1 or 5 and the nuts are all tight so no warping there. Last changed the oil 7 thousand miles ago.

I'm now inclined to think it may be coming from the drive belt / idler pulleys as it does squeak evey now and then at idle. I took the belt off at the weekend and rotated the idler pulleys by hand and there doesn't seem to be any roughness in the bearings so now at a bit of a loss other than to resort to "they all do that sir" line of thinking !

Its done 58K and I was about to do the 60K service myself as its a small one and I wanted the oil changed, can someone let me know when the belt is scheduled for replacement please or throw any ideas into the ring regarding the whistle.
Cheers

10th Nov 2014 4:23pm

mk1collector

Member Since: 17 Sep 2009
Location: West Yorkshire
Posts: 6769

Could it be turbo spool up? Have you de-cat it?

10th Nov 2014 5:00pm

K9F

Member Since: 12 Nov 2009
Location: Bournemouth
Posts: 9610

2008 Defender 90 Puma 2.4 XS CSW Stornoway Grey

Split hose? Intercooler/turbo. If you go through life with your head in the sand....all people will see is an ar5e!!

Treat every day as if it is your last....one day you will be right!!

10th Nov 2014 5:21pm

redhandluke

Member Since: 02 Jun 2013
Location: Northern Ireland
Posts: 243

Have you an EGR blank plate fitted? If so is all airtight?

10th Nov 2014 5:42pm

keith

Member Since: 15 Aug 2012
Location: Edinburgh
Posts: 2212

Cracked exhaust manifold

10th Nov 2014 6:13pm

Tommo

Member Since: 19 Dec 2013
Location: Leicestershire
Posts: 830

2006 Defender 90 Td5 Black LE Java Black

Belt replaced at 96k or 8 years

10th Nov 2014 8:02pm

Marky Boy

Member Since: 25 Oct 2013
Location: Maidenhead
Posts: 96

Thanks for the replies, egr blank kit is fitted and looks airtight, no sign of leakage. Could be turbo spool up as the note changes with throttle position, but it's only started doing it in the last few weeks and seems to be getting more pronounced.

I'll check the hoses but was under the impression that was a Puma trait rather than a TD5 one.

10th Nov 2014 8:08pm

landy andy

Member Since: 15 Feb 2009
Location: Ware, Herts
Posts: 5700

2006 Defender 110 Td5 USW Zermatt Silver

My money is on warped manifold. I think it'll get worse then snap the studs. At this stage it's just slightly warped but enough you can't bend manifold flat with nuts, but gasket is letting gases pass.

Andy

10th Nov 2014 9:54pm

Marky Boy

Member Since: 25 Oct 2013
Location: Maidenhead
Posts: 96

Andy
If it turns out to be the manifold, and it's replaced, what's to stop the replacement warping as well ? Or do you get St steel one fitted ?

11th Nov 2014 1:43pm

mk1collector

Member Since: 17 Sep 2009
Location: West Yorkshire
Posts: 6769

If you get the warped one skimmed they supposedly don't warp again (so I've read)

11th Nov 2014 4:16pm

Phatcat

Member Since: 01 Nov 2013
Location: W yorks
Posts: 98

Had the very same with mine 6 months ago. It was driving me mad trying to find it. Replaced the belt and pulley, checked the manifold etc for soot, I was convinced it was worse under load, or when the turbo was spooling up. Turned out to be the rear propshaft UJ.

11th Nov 2014 5:36pm

Marky Boy

Member Since: 25 Oct 2013
Location: Maidenhead
Posts: 96

If it's that simple I will be a happy man. I Think I'm going to end up driving it for a while until it stops working or the noise gets loud enough to work out where the problem really lies.

Thanks for the replies

11th Nov 2014 9:17pm

Muddybigdog

Member Since: 11 Apr 2014
Location: Suffolk
Posts: 1017

2007 Defender 90 Puma 2.4 XS CSW Zambezi Silver

Just been through similar scenario turned out to be split hose turbo/inter cooler as K9 says Jumped ship to reliability - Mitsubishi L200
Puma 90 XS - Sold
D3 - 2.7 S x2 (both Sold)
Freelander 2 HSE - Sold
Freelander 1 - Sold
Disco 2 - Sold

11th Nov 2014 9:35pm

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