On the N12 engine the water pump is decoupled from the friction wheel as requested by the DME but on the N14 it is constantly engaged.

There is a bleed screw on the thermostat housing. The friction wheel does have to be put into a service position by pulling the plastic cord but you would struggle to refit without having done so, so I guess this must have been done correctly. Is the friction wheel complete though? Usually the plastic outer wheel breaks off and leaves just the metal inner.

Matt