So I pulled the radiator and flushed the heck out of it with the hose. I also removed the thermostat and forward and reverse flushed the engine with the hose. A good bit of rust mud and acorn bits came out.
I put it back together without a thermostat and filled it with straight water. It had good, rapid water flow at idle. I capped it and took it for a 4 mile cruise. After it warmed up, it ran 170-190 at 45MPH (2000 RPM) without a thermostat. Ambient temp is 82F. The engine temps seemed to level out once the electric fans came on about 180F.
How hot should an engine run with no thermostat? Electric fans come on at 180F. Dual 12" fans on a non-AC size Champion 3-core aluminum radiator.
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I could explain all this to the girl at the parts store, but she'd probably call the asylum.
White '67 LeMans 407/TH350/Ford 3.89... RIP
Red '67 LeMans. 407/TH400/Ford 3.25
Last edited by chiphead; 10-01-2023 at 02:12 PM.
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