High pitch noise when accelerating.
 

Hi.
There is a strange noise that tends to be most noticeable when engine is cold. Like a high pitch noise.
It happens when accelerating, even just a slight push on pedal can make it happen. Easing off pedal and it goes away. But it doesn't always happen either.
Seems to be less noticeable when engine warmed through.
Clutch is engaging normally.

What would you think it is?

Which engine do you have?

Well, as Mike has asked, what engine is it? Each will have their own opinion, mine is that it could be a vacuum pipe off or leaking.

Is the acceleration affected and how is the idle tickover. If those are okay then it goes back to bl52krz's suggestion of a belt slipping.

It will be worth you getting your head under the bonnet while the engine is running, and operate the throttle.

It's a diesel (click on peelaaa's user name then select View public profile).

Ian; please could you annotate the displayed "75 saloon" to include your engine type so that members can give help more quickly. Many thanks. :D

Simon

Erm, my guess is a leak in the exhaust pipe front end flexi coupling.


TC

Simon I know how the forum works, but far better for an OP to post all the relevant info than everyone else having to look up his profile. ;)

And to be specific relevant info is model, engine type, gearbox type, and year of manufacture. Simples!












.

Sorry.been away. Cdti 2004 contemporary

Is your wife sitting next to you every time this happens and is she scared of speed? If so then that's where I'd be looking for that high pitched noise ;p

Vacuum is highest with a closed throttle. That is the exact opposite of acceleration. Unlikely to be that! in my view.
I would rather guess alternator!