It's pretty funny really. These overheating threads come up at least once a year (probably the same on other auto-related forums) and almost always follow this same course. Lots of suggestions, cooling system parts swapping, testing, all with little or no success. Sometimes people install massively overkill cooling systems and are okay afterward but how many people are out there doing just fine with the stock factory cooling system? Lots. I think the problem is that people assume the problem is the cooling system when the true culprit is elsewhere. There a LOT of lurkers watching but not participating because they've done it before, perhaps several times.