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Old 06-26-2019, 05:18 PM   #9
anothercarguy
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Join Date: Jan 2013
Location: Bowen island, BC
Posts: 64
Default Re: 59AB Cooling System Advice Needed from the Experts (not an overheating issue)

I might chalk the 170 degrees to variance in the Stewart Warner electric temp gauges. On start up, the engine quickly rises to 170-175 on the gauge and then is rock solid. There may be room to run a warmer thermostat, but I'm not sure how this might affect the issue at hand (mysteriously losing fluid out the overflow tube at hwy speed).

And again, thank you for the responses and for thinking about the problem. I appreciate the discussion.
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