Head gasket leak symptoms

[Rovermanroverman]

LR4 is over 110k miles starting to smell a 50/50 coolant and exhaust smell coming from the exhaust but I don’t know if it’s just in my head. Not seeing bubbling in the coolant tank. Does anyone know of any sure fire signs of a head gasket leak on a LR4?

 

[Rieseb]

There is a vapor test you can get. It will change colornif exhaust gas hits it coming back up through thencooling system. I believe your local autoparts store will have it or try amazon. What year and engine type do you have?