Knine00

iTrader: (9)

I just started up my rebuilt 5.3. The only problem I am having is its not cooling. I am running a new ls1 water pump with a straight thermostat housing and a 2000 corvette ls1 thermostat. I have tried to burp it numerous times. I have coolant coming out of my steam vent hose connection when it gets hot. I am not sure if it's the different thermostat that is the problem but I can't seem to figure it out. Any help would be great.