- Feb 10, 2021
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- Ford Ranger
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I finally got around to refilling the coolant this afternoon, let it warm up and took it for a drive. Now the ECT graph gets up to about 82° C, and then kicks down a couple degrees. The temp, gauge indicates just below halfway, perfect. @RonD was spot on with their prediction. I think that the old 165° t-stat was actually working fine, now that I know that the ECT temps are typically lower than the t-stat ratings...But hopefully running it a little warmer is better for MPG's and emissions in the long run.Glad to hear that your problem seems to be solved now! Of course, some road-test results would be even more interesting (hint, hint).It's been a few years since I last replaced a stuck-open thermostat, but I don't recall any signs that the old thermostat had been stuck open upon visual inspection after I'd replaced it. But the replacement solved the problem ever since then. And the graph of ECT with the new thermostat shows a drop when it opens, whereas the old thermostat didn't.
Thanks for the update!
That would defeat the purpose of a "jiggle valve", it needs to be on the flange, closer to the edge the better, and then when installed its put at the 12:00 position