● coolant leaking from the water pump is one major indicator of a failing head gasket
● A leaking radiator
● overheating
● white-colored or sweet-smelling exhaust
● when you see white smoke coming from your tailpipe
● smell the radiator (when it’s cool). If the odor is oil, dark or heavy smelling you probably have high back pressure coming through your radiator cap which is another indicator of a head gasket problem
● when the heat is on in your vehicle, and it operates normally while driving but not when stopped at an idle, this is normally a sign your head gasket is need of replacement.