Whirring noise after new water pump

[JoshCorsab148v]

Hi,

I have a corsa b 1.4 8v and just fitted a new water pump and alternator belt, after which the car makes a new noise as if it has a turbo attached and gets louder the higher the revs , i did notice the alternator belt was slightly smaller then the one i took off so had to readjust the alternator mounting bracket.

I dont know whether to leave it a few days and almost wear the new water pump in or if thats nt the case look into the cam belt tension

[PaulW]

Did you make sure the tension of the cambelt was OK? Water pump acts as a tensioner itself for the belt on that one. Be worth making sure its not too tight, and just double check the timing while you're at it.

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[JoshCorsab148v]

The timing is all fine, took it for a drive. The cam belt does feel tight but dont know how tight it should be :s i also just read that the water pump acts as a tensioner so could this noise be because i need to turn the pump a bitso the the pulley comes in a bit more to slacken the tension, ie ive put the pump on wrong? Theres no indication as to how te pump should sit .
Thanks

[JoshCorsab148v]

Jst took it apart and reset all te tension on the cam belt, tension indicator all lines up but still whines when the car is running. No matter what speed.

[PowerPie5000]

Is the whining noise slightly louder when you have your headlights on? My alternator whines a bit when it's under load (almost sounds like a turbo). Could be pulley bearings too.