Thread: High pitched whistling noise.

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

Had a new Alternator put in a few weeks ago.

Originally Posted by 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

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???

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.

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

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.

Exhaust manifold for sure pretty common on the TD5

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