from what I have heard, get a set of taurus e fans. go to the junkyard, and find a low mileage ford taurus. i would trust an OEM electric fan before i'd trust an aftermarket one. that way you will know it will have enough cfm flow to keep your engine cool. If it can keep a 200 HP 3.0L v6 cool, it should have no problems with a 134 HP 2.4L 4 banger. make sure you hook it up to a thermostat though. wire it up so it comes on at about 165º (your stock 2.4L thermostat is 170º), and make it stay on until it cools down to about 155-160º or so. also, set it so it runs constantly when the a/c is on. you may notice a bit more pep, and slight increase in MPG. if you must go with an aftermarket e fan, keep an eye on how many amps it draws. most people don't know, but when there is high electrical load, the alternator works harder, and therefore your gas mileage drops.
wire it up so it comes on at about 165º (your stock 2.4L thermostat is 170º), and make it stay on until it cools down to about 155-160º or so
Not a pro here, but you don't want to set it below the thermostat rating, do you? The thermostat is there to make sure the engine heats up to the correct operating temp; it opens once the engine is hot enough and then your cooling system goes to work trying not to let the engine overheat. If it cools off below the thermostat rating, the thermostat will close and try to warm things up again, so you would always have the fan and thermostat fighting each other if those temperatures overlapped. I'd set the temp sensor up 10* or 20* higher than your thermostat is rated.
I replaced the clutch fan with an electric in my Geo; it worked very well. I got a used one off of eBay (can't remember out of what) and hooked it to a parts store probe-type heat sensor. I was very pleased with the outcome. I didn't notice any real improvement (except it was quieter) in performance or MPG with that one change, but along with some exhaust, intake, and ignition changes the thing is still gettting 3 MPG more than what it's rated for with 170k miles and 15 years old.
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Jerry
2004 Frontier, King Cab, XE, 4x1, 4-cyl, 5-spd
the coolant trapped behind the thermostat inside the engine block will still be heating up. this way, nice 165º coolant will rush in as soon as the thermostat opens, cooling the engine nice and quick. i'm no pro either, but thats just what i think.
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