Sounds like a hoover

[Gogglebox]

Hello fellow members, information required.

On starting my '98 2.5 V6, you can barely hear the engine running due to a concealed fan? which I have traced to just infront of the passenger front wheel, whining its box off. This will continue for 3-5 minutes starting from cold. When hot it makes the noise for only 15 seconds or so. The engine runs fine at all times.

What is it? what does it do, and what would happen if I disconnected it? Why is it now making this noise, and appears to be getting progressively worse.

Not only is it annoying, but extremely loud when outside the vehicle, and onlookers begin to back away when you start up.

[tunnie]

sounds like the secondary air injection...

[zirk]

If its like mine, it sounds like the secondary air pump thingy, Ive sort of got use to it, as it only does it when its cold.

Im told you can disconect them, but you had better check with some else on here just to be sure.

[PaulW]

Yeah mine does it aswell, got used to it now.

If you rev the engine to just above 4000 rpm, it will shut it off

Or as zirk said, you can just unplug it!  I would, but cant be bothered with faffing about...

[RolandL]

Hello fellow members, information required.

On starting my '98 2.5 V6, you can barely hear the engine running due to a concealed fan? which I have traced to just infront of the passenger front wheel, whining its box off. This will continue for 3-5 minutes starting from cold. When hot it makes the noise for only 15 seconds or so. The engine runs fine at all times.

What is it? what does it do, and what would happen if I disconnected it? Why is it now making this noise, and appears to be getting progressively worse.

Not only is it annoying, but extremely loud when outside the vehicle, and onlookers begin to back away when you start up.

It's the secondary air injection pump

(in order)

Not a lot, it just won't work  
It's nearly nackered  


seriously, you have a couple of options

you can disconnect it, it will not be a problem or you could recycle one from the local scrapyard and do you carbon foot print the world of good (£20 ish)  

mine went a while back, anoying little b***er isn't it  

[Gogglebox]

Thanks for the info guys.

Will unplug tomoz, and source another down the scrappy.

[johnc46]

Unplug and dont get another.

[The Cambelt Kid]

I unpluged mine and i think i forgot to put it back when i sold it... de dums