Finally got my jeep going,after blowing up my 327 I put in a chevy 283.Today we got or first snow in Minnesota,so i decided to go for a ride.I have an electric fan and an aluminum radiator and a 160 thermostat.All day long it ran at 115 degrees I dont have a heater or top so i'm not worried about that.I'm just wondering if a engine running that cold will hurt it.When I stop it goes up to 150.