Is it OK to do it in this sort of weather,if I just remove the pipe work to it and dont drain the system will the engine be OK, its bloody cold in my garage! (but not freezing) and I dont want low coolant to somehow damage the waterways or engine

 

It will be fine mate. Just make sure you top it back up when back together

 

with a suitable antifreeze mix

 

yeah it would take hours to freeze and would have to be severe minus temps