Mini Cooper R56 - 2009 - coolant leak, can't find it.
I have a '59 plate R56 cooper. I've been loosing some coolant occasionally and now it's getting worse, so about 1/2 litre every couple of days now. I've been topping it up to make sure it doesn't overheat, but I can't seem to find where it's leaking from.
I've put my hand over the bottom of the thermostat sensor housing and can't feel anything damp there.
But, if I look underneath the car, there is a square bit of metal at the bottom and this is wet, with the colour of the coolant. Any ideas on where to go to look ?
I've added a couple of pictures of the bit I can find that is wet.