Sound after switching off

[RattyCortina]

When I switch off the engine on my van I can hear a sound in the engine bay like a small motor running, it carries on for maybe 30 seconds and then stops. It was doing it before the recent head work. Anyone know what it is, and should I be worried about it?

[cancunia]

It's probably the vacuum pump which is used for the brakes, EGR & turbo. Nothing to worry about AFAIK.

[Sol]

It's normal, the butterfly motors in the air doser on the older style 1.6 HDi make noises until they are parked in the default position. My old van did it too. Like a wheeeeee rrrrr click click rrrr etc.

[RattyCortina]

Thanks, I think I am getting a bit paranoid!