Reply to "Overheating problems with my Pantera"

One of the many possibilities for overheat is, the stock Italian surge tank neck is longer than a comparable US neck, so a 13-lb US cap will release at much lower than 13 psi. Euro caps are longer than US caps. Additionally, the base of the stock tank neck is usually rough, making good sealing impossible. The effect is, it may seal water as the block heats up and pushes water into the overflow tank. But when the engine cools down, the combination of a short cap & rough seal base cannot hold the vacuum produced, so it sucks air in instead of water from the overflow. The next time you run the engine, the water level is low and the engine gets hotter. After about 2 cycles of this, the engine overheats & there is no trace of a water leak; very frustrating. Finally, when the engine overheats and begins to spit coolant out of the surge tank, the design is such that the coolant runs down the inner fender panel right into a large access hole in the rt lower frame rail, where it sits forever & rusts. As I said, there are many potential causes of overheating, plus some unintended consequenses.