Oh well, lets swap engine and take this one apart to find out. It did sit for 20 years with only tap water in it so coolant system is probably full with rust.
I have a (new) d24t radiator. Didnt fit with current hoses but will switch them with other engine. Also my mechanical fan has no cowl or air box, would that matter? And thermostat its a 87 degrees one, is that okay.
I notice it heats up REALLY fast under load. Going uphill slowly, it can go from cold to 1/2 temp gauge in a minute or so..
Still strange, i measured temperatures again today, 3/4 of the gauge was 100 degrees, not that hot right? My motorcycle goes up to 120 on hot days without problems, but that is air cooled..
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