Just wondering if anyone knows how hot the LS2 can get before any damage (long or short term) can occur? I was low on coolant and did not know it and the temp guage went up to the "H" mark - max. I figured out on the guage that is about 340-350 degrees F. By the time I could pull over and shut it off, probably about 2 minutes elapsed. Cooling fans stayed on even after I shut it down for probably 5-6 minutes. Then I added about 3/4 of a gallon of coolant, and all is well.