For about a week my wifes 01 Excursion 6.8l has been blowing white smoke on startup and lasts a mile or so. Also has lost a bit of coolant and the coolant can be smelt at the exhaust. However there is no coolant in the oil. I did put a pressure gauge on the degas bottle (like we do to test headgaskets on a 6.0) but not sure if that is a proper test on these gassers. I will say that according to the pressure gauge it holds at around 7 psi once its warmed up. Could this be a headgasket failure or something else. A scangauge has been in the vehicle for over 2 years and the hightest the coolant has ever got was like 204 on a very hot day but it came right back down to low 190s and cylinder head temps are always in sync with the coolant temps. Thanks for the info.

 

Could also be intake gasket failure.

 

Thanks Ill look into that further. Im not versed on the V10 like I am the 6.0 so I wanted to make sure im on the right track. I will do some investigating later today.

 

I 2nd this motion!!