I did not go there first because your engine does not have a history of leaking head gaskets. (I have one in my daily driver 1994 Grand Voyager, and my 1993 Dynasty). Dead fans are the better suspect.
If a head gasket is leaking, you will be be losing coolant. There is a quick chemical test that can be performed at the radiator, with the engine running. Air is drawn through a glass cylinder with two chambers partially-filled with a special dark blue liquid. If combustion gases are present, the liquid will turn bright yellow.
You can also add a small bottle of dark purple dye to the coolant, then check a day or two later with a black light. The dye will show up as a bright yellow stain that you can follow back to the source. If a head gasket is leaking, you will find the dye inside the tail pipe. Auto parts stores will have the dye, and those that rent or borrow tools should have a black light.
Remember, the cooling fans are not needed at higher speeds. If the overheating only occurs at low speeds or when stopped, it's more likely to be a fan issue.
Friday, May 26th, 2017 AT 6:51 PM
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