Whistling Noise

[DanWY]

Hello all,

I hope someone can help. My car has developed a very high pitched whistling sound between 2/3000 revs and more so at higher speed mainly from 50 upwards!

It's only started happening in the past few days.

Thanks

Dan

[Piggy]

Is that on light throttle or hard throttle??

has the performance changed?

is there any smoke from exhaust while this happens?

[DanWY]

It's approx half way on the pedal travel not thrashing it.

Not that I can tell just a god awful noise.

I couldn't see any smoke, it was just getting dark and I was on the motorway.

[Piggy]

try a hard boost run, 30-60mph in third...as the boost comes on see if the whistling comes on with it...if so...start searching for a boost leak...or new turbo...but lets hope boost leak.

it could alternatively be a aux belt...

friend of mine had me getting a new turbo for her 306....whistling noise....she was 100% on it...till the aux belt snapped

[DanWY]

I have done the aux belt recently, but could be. I'll try do that tomorrow. Anything else to look for?

[Piggy]

suspect belt if you done it recently...worth a quick look...see if loose

[DanWY]

I'll take a look tomorrow. I'll try record the sound too.

[cwspellowe]

Sure you've set the tension on the aux belt properly? Could be a dodgy pulley especially if it's tightened too much

[CJ_Derv]

I had similar was tensioner, started whistling then screaching then grinding over a fair few weeks tho

[Toms306]

If you did the belt without a new tensioner then the tensioner is probably failing, same happened when I done the belt on my hdi. New tensioner sorted it.

[DanWY]

Cheers for all the replies. I'll check the belt then. I did it without a new tensioner as it was like new and felt fine, also tensioned it according to the manual.

[DanWY]

Well today I have been out in the car and done as suggested and don't think it's my aux belt as it only happens between 2500/4200rpm and then stops again. I have attached a video sorry about the quality but it' the only way I could get the video on my own.



Noise can be heard from 20 seconds onward.

Thanks

[Daniel306]

Its the compressor wheel touching on the housing, time for a new turbo

[DanWY]

Ohhhhh damn! Better get looking then. What we taking time wise and difficulty for replacing?

[Daniel306]

Thanks to darren its easier, if its your first time book a weekend for it

[DanWY]

Ohhh that looks ok. I think I could do that myself, just need to find a new turbo or get mine refurbished.

[natashajohny]

Remove the belt and start engine. If noise goes away, then it is coming from one of the pulleys on the accessories, thus eliminating a vacuum leak on the engine.

[Lwilliams]

Remove the belt and start engine. If noise goes away, then it is coming from one of the pulleys on the accessories, thus eliminating a vacuum leak on the engine.

Hi mate but if you look at the date it was a few months ago he posted this