High pitched whistling noise.

[philthy]

Hi all, Just had a bit of mechanical work done on my 2000 Defender Td5 130 HCPU. The brake booster had a crack in it and was replaced with a newie. But now I have a noise that is identical to a boiling kettle on the stove whistling.Rang the shop, and they dont know without looking at it. I'll take it back but, 2 hrs drive. Just thought someone here might know. I looked all over it, checked for anything loose incl turbo bolts. Doesn't make a noise under load, but moreso while cruising at 80,100,110. Edit: Plus touching the accelerator pedal ever so lightly,the whistling will happen.

[shack]

Is the vehicle charging ok?
Put a multimeter on the battery with the engine idling, then rev up,
If the whistling changes with the volts it's possibly the alternator, I've had a couple of rectifiers go bad and they can make a high pitched whistle when they do, often they will also drain the battery when the car is turned off

[philthy]

Had a new Alternator put in a few weeks ago.

[philthy]

Is the vehicle charging ok?
Put a multimeter on the battery with the engine idling, then rev up,
If the whistling changes with the volts it's possibly the alternator, I've had a couple of rectifiers go bad and they can make a high pitched whistle when they do, often they will also drain the battery when the car is turned off New Alternator a few weeks ago. No whistling until this booster job was done. Did a 600km trip and whistling didn't get worse or better. Brakes working good as. The thing is,just the slightest touch of the accelarator and it'll start whistling???

[donh54]

The throttle being related to it means I'd be checking all the induction and vacuum hoses/pipes/joins/flanges. Don't just look, physically remove them and inspect closely for cracks and leaks.

[donh54]

Pay extra attention to anything they may have disturbed during the work.

[DazzaTD5]

Perhaps more noticeable when cold, but not always...

Exhaust manifold leak, remove acoustic cover and turbo heat shield, look at front/back for black soot on head.

[scarry]

Exhaust manifold for sure pretty common on the TD5

[DazzaTD5]

and doesnt this post really belong in the Disco 2 bit?

[loanrangie]

and doesnt this post really belong in the Disco 2 bit?

Yes it does [thumbsupbig].

[Bohica]

It's a TD% problem, more people here than in defender land maybe?

[rangieman]

and doesnt this post really belong in the Disco 2 bit?
N0 [tonguewink]
2000 Defender Td5 130 HCPU