1990-1991 Corvettes also may have an oil cooler. 1990+ Corvettes have two radiator cooling fans. We have had both the heavy duty and standard duty radiators out of the 1985-89 models and could not see any major differences. This option consisted of an extra cooling fan in front of the a/c condenser, heavy duty radiator and oil cooler. GM had a B4P cooling system option available for 1985-1989 Corvettes. Radiator cooling fans were not designed for continuous use and they will fail prematurely.Īll of the aftermarket cooling fan switches have harnesses provided to connect the new style connector. “Why not run the cooling fans continuously?” Have a Corvette that sees track time on a regular basis? Our 244502 (1984-93) or 244503 (1994-95) manually operated switch allows you to override the automatic switch for additional cooling while waiting in the staging area.
The fan would run almost constantly as the thermostat regulates the temperature at 195 degrees.įor lower operating temperatures, our 243139 Hyper-Tech Power Stat coupled with our 244381 cooling fan switch (that activates the fan at 185 degrees) would provide the correct hysteresis. Don’t forget the 242135 thermostat gasket to properly seal the thermostat housing.Īnother scenario would be the use of a 195 degree thermostat with the 244455 switch.
Installing our 243108 thermostat allows the engine to run in the 185-192 degree range. When the engine coolant temperature drops below 185 degrees, the cooling fan is turned off. For instance, our 244455 fan switch turns the fan on in the 200 degree range. We recommend using a cooling fan switch that matches the thermostat opening temperature. There are various cooling fan control switches available to turn the cooling fans on earlier than the factory ECM or PCM controlled settings. Lower temperatures will work at the expense of fuel mileage. 1984 Corvettes will have the most noticeable improvement, as the factory cooling fan setting is 238 degrees.
For this reason, we recommend using a minimum 180 degree thermostat and turning on the cooling fans at the 200-205 degree range. The oxygen sensor works more efficiently at high exhaust temperatures promoting less fuel usage and emissions. A common question asked among C4 Corvette owners is “why does my engine run so hot? The cooling fans do not come on until the coolant temperature is way too hot”.įederal regulations required high operating temperatures to keep idle emissions at their designated levels.
0 kommentar(er)
