Engine whining

[MightyHilux29]

Hi I have a 2007 rwd hilux, I have a whining noise coming from the engine, I can hear it as soon as I turn on the car, and when I'm just idoling, when i accelerate it gets hi piched , when in 4th it not as noticeable, I've taken it to the mechanic and they don't have a clue, if someone has had this issue and can help me that would be great. 

James 

[trentmeyer23]

So it hasn't been narrowed down at all?

Check belts, bearings on pulleys and the turbo.

Is it lacking power?

If possible, post a video to Youtube and post the link here.

[MightyHilux29]

Thank you for the reply. 

I thought it was the bearings to,  but when I took it to the mechanic he checked them and said there were all tight, and couldn't see anything wrong, 

power wise it seems ok, I haven't checked the turbo yet that's nxt on my list. 

[andrez5]

Check also the alternator. Sometimes the whining sound comes from it.

Edited May 3, 2017 by andrez5

[MightyHilux29]

Cheers andrez5 

Yea it was the alternator have now replaced it and all is well 

james