Strange buzzing noise!

[bigman1207]

2001 Vauxhall Astra 1.8SXi
120k


Okay when the car is running there is a whirring/buzzing noise coming form the right hand side of the engine bay. The noise seems to come from below the battery tray / rear of and below the fuse box (fuse box is to the left of ECU) below and slightly further back is the power steering fluid bottle.

The noise does not change when revved, cant tell if it;s there when driving and don't think the noise is any worse when the steering is turned, it not like a groaning or anything just a kinda buzzing


Any ideas ?


Cheers

BM

[welshpug]

many cars like these have air pumps as emissions cheats, might be one of those.

also, might be a cooling fan for the fusebox, I kid you not, the Omega a friend broke did indeed have a fan to cool a fusebox!!

[bigman1207]

NOt sure about the air pump for emission cheats unless it was factory fitted, not been a kids car, liking the cooling fan idea a lot! will defo have a look at that in the light

cheers

[welshpug]

air pump was standard fit on many engines.

[bortaf]

Power steering pump?

[bigman1207]

So thinking its the fan (if it has one) it is quiet audible and an easy check i think.

Power steering pump, - if i disonnect the power supply and noise stops with engine running - is that a way to check ?

Air pump - no idea where to look for it but sounds promising too!

Three great suggestions - many thanks

[bigman1207]

So thinking its the fan (if it has one) it is quiet audible and an easy check i think.

Power steering pump, - if i disonnect the power supply and noise stops with engine running - is that a way to check ?

Air pump - no idea where to look for it but sounds promising too!

Three great suggestions - many thanks

[Deleted]

The pump thingy for the EGR is located there.