auxillary

had a search, couldnt find owt how easy and how do you change a aux belt and tensioner on leon cupra please guys, thinking the tensioner has gone on mine causing a loud whining on revs, whining is louder on fast idle... anyone ever diyd it? looks like tensioner out, belt off back on and new...

does anyone know if the recirculating pump situated on the top of the rad can be found on any other types of cars for example volkswagens, trouble getting a hold of one, also need to know what the switch on the side of the power steering pump does mine has snapped and i have put it back together...

needing an auxillary pump , the small pump which circulates the water when the engine is switched off sits on top of the radiator any help would be appreciated