Ford KA Thermostat housing issue?

Ford KA Thermostat housing issue

The above image is of the housing.

Whilst removing the old housing, the bolt on the top left of the housing (in accordance with the photo) snapped. It's stuck in the engine.

I was wondering what impact it would have if I did not remove and replace the broken bolt.

i.e. Left that part of the housing unsecured when replacing it with the new one.

Pretty urgent so a quick reply will get the best answer!

Ont only overheat but can draw on dirt and air. Witch can destroy your waterpump, witch is driven by the timing belt. So yeah the timing belt rupsures and byebye engine. This is only in the worst case but anyway don't drive it

It would leak, your car would lose water and overheat.

Hi, you should be able to screw it out once you get the part off. Unless it is rusted in with the head off of it there should be not prussher on it so it should just screw out…