some weirdness for you; i need to refill my coolant and when i did i noticed some strange gunk in the neck of the refill point. I cleaned it out and then slowly started to add some water (to make sure there was no problem before adding the made up antifreeze), it just filled up the refill point!

I've tried squeezing the lower rad hose, nothing happened so I removed it to try and start again assuming there was an air lock; nothing happened the refill point is still full of water...any suggestions?

Ian