[Nick Williams]

1997 Vectra V6 SRi.
Can anyone tell me what the electric pump mounted behind the radiator does, and when it actually operates please
Thanks
NW

 

[fluffsri]

Do you mean the air pump that sits behind the battery? I cant think of an electric pump behind the rad???

 

[Irishrover]

Perhaps it's the aircon compressor???????????

 

[fluffsri]

A/C pump isnt electric its run of the aux drive belt.

 

[erroneusbogz]

aux air blower it warm's up the cat in the exhaust,make's the car sound like a jet fighter taxiing out

 

[Irishrover]

I didn't know that!!

 

[Nick Williams]

No, not the auxiliary air pump. This pump is definitely between the engine and the rad, and one pipe from it goes to the nearside of the rad. I think it is to circulate water in the cooling system when you swith the engine off. What I want to know is when it is supposed to run, is it temperature/ time related or does it run all the time? Thanks for your responses

NW

 

[erroneusbogz]

not sure about a pump but my rad fan run's on after the engine's been turned off,not for for very long though.

 

[fluffsri]

No, not the auxiliary air pump. This pump is definitely between the engine and the rad, and one pipe from it goes to the nearside of the rad. I think it is to circulate water in the cooling system when you swith the engine off. What I want to know is when it is supposed to run, is it temperature/ time related or does it run all the time? Thanks for your responses

NW

There is a cylinder on the fan mounting tray? Can you take a pic mate?

 

[Nick Williams]

Will do

NW

 

[spookyman60]

on the omegas its a secondary electrical water pump, thats operated when the fans are on to help cooling when engine switched off, as far as im aware it was only fitted on later models of omega so maybe is the same on vectras all tho iirc the omega has 2 one under the expansion tank and one attached to the radiator