06-29-2023, 02:37 PM
I have 1997 454 XLi Crusaders that are running properly (fingers crossed). Just flushed/changed coolant. Original Crusader OEM parts manual shows a 170 degree thermostat. I run just a tad under 180. That temp pretty much hold regardless of what my RPMs are once warmed up. Temp surges 10 degrees or so when I shut engines off.

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