Mk2 Galaxy coolant leak?

When I remove engine cover (mk2 tdi zetec), there is a box shaped item on the passenger side of the engine block. I have coolant leaking from the underside when vehicle is started. Any ideas what this is?
Frustrated-galaxy, February 2014


done
On further investigation the object is the vacuum pump. The leak is below, possibly piping. As soon as I add coolant, it leaks just as quickly.

Frustrated-galaxy, February 2014
It is semi-cylindrical metal main body. Plastic side access cover secure by Allen bolts. Various coolant lines running underneath and below rear. Covered by large rubber hose (air?). I've taken pictures but this site doesn't allow upload.

Frustrated-galaxy, February 2014
Can you be more specific? What size is the box,is it square,rectangular,does it have any connections? wiring/hoses etc

cdc, February 2014
link Click here to see other fixes for Galaxy.