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Microscopic crack in the head that will open up at high RPMs, subsequently jettising the coolent and overheating the engine. Have the heads X-rayed, than have a good aluminum welder weld it.

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โˆ™ 2007-12-18 00:58:04
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Q: What causes a 95 Cadillac STS to overheat the thermostat has been replaced and it only runs hot at high speed?
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