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Old 11-17-2019, 08:55 PM   #14
Senior Member
Join Date: Nov 2016
Location: Lexington MA
Posts: 130
Default Re: 52 v8 flathead heater

I bypassed the heater control valve to isolate it from the circulating system. I did this by coupling the two hoses that go to the valve. I figure this will complete the cycle. However, even though the feed hose to the heater core was warm, I don't think the water was circulating through the heater core since the exit tube was cool.
Do you think the heater core is toast? Is there any remedy besides replacement? Am I missing something here or am I on the right track? Maybe the valve function is necessary to allow the water to circulate through the core?
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