****** - Verified Buyer
4.5
Installed this fan setup in place of a 9-blade, viscous clutch, crank mounted 14" fan in my vintage diesel camper. This was after the original fan self destructed and took out the radiator with it. After spending hours adapting and wiring the Derale fans, I was sadly disappointed on the next road trip when I had an engine that was constantly overheating on every climb and into headwinds. I had to return home due to this, and after testing out everything else to rule out other issues, I removed the Derale fans and reinstalled a replacement original clutched fan along with the original fan shroud, and was shocked to find the temperature was now perfect again. So, this purchase was not only a waste of money but time too. It cannot perform as well as the old-school fan! I wouldn't recommend it.