Dorman 621-410 Engine Cooling Fan Assembly for Select Dodge/Ram Models

Plug and play. Works very good. Well made.

I bought this to modify my 2016 RAM 1500 Bighorn with the 5.7L Hemi V8. From the factory the V8 trucks come with two fans, one mechanical, one electrical. The electrical one is practically useless as it just sits in a crappy thin plastic wire frame. The mechanical one does all the real cooling because it has a shroud. On the 2012-2016 trucks you can delete the mechanical fan and replace the electric with this unit and it'll keep temps in check on the V8s, even while towing heavy! The removed parasitic loss of the mechanical fan even boosts MPGs a touch (1-3 depending). To anyone looking to do this mod, be advised, the only way this will work is either a. you pull the screw holding the connector loose and drop it down for the slack to connect it to the truck's harness or b. cut the truck's factory harness and extend the wires for the pigtail. Also do your research and verify that you're in the right year range as they updated the e-fan connector in the later year models of this generation, meaning this unit won't work for those trucks without additional modification.

Had to replace the water pump on my 5.7L Hemi so decided to drop the thermostat from 203 to 180 and delete the clutch fan. This fan is a direct fit on radiator and uses all the same mechanical clamps/bolt holes and lines up perfectly with the electrical connector as well as the top radiator hose connector. Super easy swap. The only recommendation would be to buy a piece of flat bar and drill a couple holes to hold the water pump pulley in place while you break the mechanical fan loose. If you’ve got some miles on your motor, trying to just apply additional tension to the belt is not strong enough to break it loose. This fan performs very well. Being from Texas I was nervous that it would not keep up in the summer. Hottest this motor has gotten is 198F with an ambient air temp of 100+F for weeks. Any power gains from losing the mechanical fans’ parasitic drag are negligible. Gas mileage is slightly less since the swap. I swapped my thermostat at the same time so I’m thinking the lower temp is responsible for that but will review again once I swap the thermostat up to 190F. Couple of points about the truck. 5” lifted 4x4 Outdoorsman. This fan delete wouldn’t be recommended if your wheel a lot. My truck never sees much off-road but pulls heavy trailers regularly and the fan keeps up well. Overall, I’m extremely pleased with the fan swap and now have a ridiculous amount of space in front of the motor!

As advertised. Worked perfectly as a plug and play for a 2013 Ram 1500 5.7 Hemi to delete the mechanical fan and smaller AC only e-fan. Have superchips tuner on tow tune. Have stock 203f thermostat. Comes on at 210f and brings down to 190f in about 30 seconds. With max AC on, kicks in at around 205f and takes down to 190f before turning off. Appears to have increased mpgs a little bit after getting rid of partially stuck on mechanical fan. Been on the truck for 1 day so far...

fit perfect in my 2016 ram 1500 sport, after install noticed a crack on the housing but doesnt seem to affect the fan