I compiled the following list of cooling system temperatures to establish a baseline for monitoring temperature issues and I’ve posted it here in case it’s useful to anyone else. I’m assuming that my car is running at a “normal” temperature and I’m not accounting for ambient air temperature.
In my experience there is no change in readings when switching from OEM to the Mishimoto radiator but the only way to state that confidently would be to account for ambient temperature and engine load.
Thermostat housing temperature varied +/-10˚C over my tests and should not be considered accurate.
65˚C – Thermostat Housing +/-10˚C
80˚C – Top Radiator Hose
73˚C – Water Pump to Thermostat Housing Hose
75˚C – Bottom Radiator Hose
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