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Old 04-20-2005, 10:49 PM
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Stock engines are built with bypasses that heat the thermostat with a constant slip stream of coolant so it will open properly. I think you are on the right track in that it sounds like the passage in your engine is plugged. Does the engine run @ design low temp once the 'stat finally opens? If so that is the problem. If it stays at the high reading all the time with the 'stat, the bypass isn't the problem and you need to look elsewhere. While you can drill a couple of 1/8" holes in the rim of the 'stat and achieve the necessary bypass function, that isn't very elegant. Should be a last resort. Better approach would be to find out why the bypass passage isn't functioning and fix that.
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