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Electric fan on Chevy 2500

Discussion in 'Chevy Trucks' started by CK82, Dec 19, 2005.

  1. CK82

    CK82 Senior Member
    Messages: 189

    I have been having problems with my chevy silverado 2500 (454, 7.4liter) running really hot. It has an extra electric fan in front of the radiator and of course the stanadard clutch fan. I recently removed the clutch spring from its slot so the fan would run constantly and prevent it from running as hot, it worked for the most part. Well I was just curious as to whether or not I needed to do this since the truck is equipped with an extra electric fan to prevent it from running as hot? When does the electric fan come on, when the defrost is on or? I am losing a lot of power as a result of the clutch fan running constantly and would like to put things back to normal, that is if I can find a way to not overheat. Please help, or suggestions

  2. karl klein

    karl klein Senior Member
    Messages: 557

    my 97 wu=ith the 454 has a electric fan on the external tranny cooler and it runs on a t stat i think. i would recommend replacing the fan clutch and t stat and you should be good u could put a lower temp t stat in 180 in stead of 195
  3. GetMore

    GetMore Senior Member
    Messages: 179

    My '87 had the electric fan and it was switched by a relay on the driver's side fender. I believe the ECU controlled the fan, based on coolant temp.
  4. derekbroerse

    derekbroerse 2000 Club Member
    Messages: 2,377

    You are not supposed to run an electric fan in front of a mechanical fan. One blocks the flow of the other. Hard to beat a large, HD clutch fan on a truck.