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Overheating mystery
I have a '92 SVX with a brand new radiator, thermostat, upper and lower hoses and fan switch. Just since a few months ago, I've noticed that it has a tendency to overheat after driving highway speeds. I drive it around town with no trouble, and it usually does fine on the highway as long as I don't slow down. I drove it for an hour and a half a couple weeks ago and the temp gauge stayed right in the middle the whole way...until I slowed down and it started to overheat. I've had the system pressure-checked for leaks which yielded negative results. The only thing I can think of is a bad water pump, but I still have experts telling me that it sounds like either a thermostat or a head gasket. Anybody else have this issue?
Thanks,
Isaiah
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