Re: Running very hot

Posted by Fish'n Jim On 2018/9/10 8:37:24

If something goes wrong after a repair, then something was most likely improperly repaired/replaced. This is troubleshooting 101 stuff(NASA). "defects on or about a change"

Three things come to mind; thermostat put in backward, air pocket in the block or head - inadequate fill, problems with the pump rebuild - like a piece of gasket fell taking off into a passage or other simple things like a clearance issue. The way water flows, pumps have to have a certain casing clearance to function otherwise cavitation or other issues develop.

Heat transfer is controlled in autos by air exchange. Simply, a pound of water(~pint) holds one BTU per degree, but it takes ~50 ft3 (4X the mass) of air at a lower temperature to absorb that amount of heat. This ones before my time, but don't these '41 cars have the thermostatic grill louvers? If equipped, maybe that's not functioning/hooked up as well.

Then next level falls on the water side; fouling, flow, and surface area.
Then the combustion side; temp, heat generation.