By signs of a blown headgasket, what signs are you looking for? If your coolant level is full, and your cooling fans are functional, coming on around 212, then I would recommend having the cooling system tested for the presence of combustion gases. Mysterious overheating conditions that are not corrected with normal service procedures(T-stat, external leaks), are most often result of leaking head gaskets. With the mileage that you have on the vehicle, and not knowing whether thread repair has been performed on the head bolt holes, make it more of a legitimate possibility. There may or may not be external signs, like white smoke, leaks at the sealing area, or excess pressure, to indicate. Especially since it takes time to overheat. The signs you may be looking for are indications of accelerated problems.
Thursday, September 27th, 2018 AT 10:46 AM