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

Plug and play. Works very good. Well made.

The Dodge Ram 1500 5.7L Hemi truck comes with an electric cooling fan for the a/c condenser and a mechanical clutched fan driven off of the water pump. My electric fan for the a/c cooler failed, leaving the cooling responsibilities to the mechanical-driven fan, which when living in Southeast Texas...isn't a good combination.I knew about the "clutched-fan to electric fan" mod that's very popular, and did a ton more research on the matter, and decided to make the mod. Basically, the mod is...the Ram 1500 V-6 truck uses the same radiator, but uses a single electric fan for all the cooling responsibilities. Since both the V6 and V8 engines use the same radiator, the fan mounts are identical too.I ordered this Dorman V-6 fan and pulled the mechanical fan and broken a/c fan out, and put the new Dorman fan directly in its place. The electrical plug is the one originally used for the a/c fan...same plug configuration, etc. It works beautifully!!! Before, my temp would climb to 217-219°F, and I would have to rev the engine while stopped, to keep the fan moving fast enough to keep from over-heating. Now, it doesn't go over 197°F!!Now, there are a couple of very important things to know before doing this mod. 1) Since the power comes from the a/c evaporator cooling fan circuit, it will only be energized when the a/c is turned on. So, you must leave the a/c powered on. 2) The exception to #1 is changing computer settings using a tuner, like the Diablo Predator 2 tuner (sold here on Amazon) to change the temp for when the fan will turn on.I have not needed to use a tuner...my a/c is powered on year-round. However, I probably will, at some point, purchase a tuner and make that change, while also making other mods to the truck's computer.There are plenty of YouTube videos that document the steps for this mod, and a novice can do it without too much effort or know-how. I'm happy with the mod and I'm very happy with my Dorman fan!!2022-08-30 update:The electric fan has operated flawlessly! I did use a Diablo i3 tuner to program the electric fan to be operational, independent of the a/c circuit. I have set the fan to turn on when coolant temperature reaches or exceeds 190°F. So now, I can turn the a/c compressor off, and the electric fan will still come on when needed. It's a beautiful thing!

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