i asked this in the ducati superbike section but i'll post it here too to see if i can get more responses. what do you guys do when you have to run water wetter at a track day/race and overnite temps can drop below 30? one suggestion was to drain as much as possible before nite falls and refill the next morning. how low can the temps drop before there's a danger of damaged caused by expanded water? 32F? lower? higher? i rather sound stupid here than feel stupid when my cases are cracked because of frozen water.