Do you have a blown head gasket if there white smoke coming from your tailpipe and elevated temp and the engine sputters in low gears?

thats quite psoosible , if the sputtering is at low speeds when the engin e is cold . A sure sign that you have a blown head gasket is when you loose coolant with no external signs of collant loss , you have coolant in the engine oil or vice versa . Any of those conditions warrant further investigation to determine the cause . usually a compression test and coolant leak test will show when you have a blown head gasket . elevated engine temp is also another common sign of a blown head gasket , get it checked out and repaired asap as you can quickly destroy an engine with a bad head gasket depending on how bad it is and how much coolant/lubricant are beign lost or mixed together.