The clutch has a bi-metal thermostatic coil that measures the temperature around the engine. Step 2: Remove the fan. These conditions are normal and should cease once the fan clutch disengages. If the fan rotates more than five times, you can bet the clutch is bad. On a functional fan clutch, the fan blades will all be lined up neatly inside the housing, which should sit upright with an equal amount of space between the radiator and engine. Wiggle each of the fan blades individually to see if they feel damaged or displaced. Each time your engine gets too hot, this clutch fully engages your fan.
I dont recall seeing that much of an upgrade for a higher grade one, that i can remember. It could take a brief drive to get it to declutch. Since this clutch is always engaged to the engine, it uses up more energy. So these types of fan clutches react to speed. Step 3: Replace the fan clutch. Service manager said - he's a good mechanic, not sure what happened.
It may be a good idea to have a mechanic look over your work after you are done. The clutch disengages as the air temperature decreases, closing the valve and allowing the silicone fluid to be pumped back into the reservoir. The valve controls the flow of a viscous silicone fluid between chambers in the clutch assembly. With the fluid drained, tighten the drain plug with the needle-nose pliers. Don't confuse this with flex in the blade.
How do I know if my radiator fan clutch needs to be replaced? Poor performance or poor gas mileage can be symptoms of overcooling. This may cause overheating, poor gas mileage, or excessive noise. See if the fan slows or stops when you increase your speed. Let's say spinning the fan didn't reveal a problem, there's no leak and you think the spring is okay. When cold, the silicone drive fluid is pumped from the working area to the reservoir. Obviously, if a substantial amount of fluid is missing, the clutch won't spin as fast as it should. All fans have dual pilots and bolt circles.
A damaged fan clutch cannot do its job. You have to make sure to rev up your car for about ten to fifteen minutes. You may also notice slower acceleration and a loss of power. As the coolant gets hot, fan noise should increase to a roar and the fan should spin a lot faster. In these cases, a fan driven off of the front of the engine can blow air onto the radiator to cool it. This article was co-authored by our trained team of editors and researchers who validated it for accuracy and comprehensiveness. Too much free-wheeling is usually a sign that the clutch is prone to slipping.
Just follow these simple steps. When the engine is hot, the clutch fan runs nearly as fast as the engine. The fan clutch will spin loosely until the temperature reaches a certain level, at which point the fan clutch will fully engage so that the fan can work at maximum efficiency. One day i will get a management job ya it sounds like you need one an make sure you dont strip the fan bolts putting a new one on. If it's a hot day, the coolant temp will rise. When a leak occurs, it's at the bearing seal, at the center rear of the clutch.
It is important to note that replacing your original fan clutch with the wrong replacement can result in a number of problems, including full blown failure of the fan clutch, so make sure you are getting the right one for your vehicle. Newer vehicles feature electric cooling fans controlled by a relay, but older vehicles are likely equipped with a clutch style fan. So, decided since the tax man didn't rob me this year to get a new radiator, hoses, belt, thermostat, water pump, idle pulley, and fan clutch. But if you're just fixing the family car, remember that a vehicle maker can integrate electric fan controls into the powertrain computer for a more precise result than you could ever get with an aftermarket kit. Your owner's manual should give you the part number of the clutch that will work best with your car.
If you don't have a thermometer, you can hear what you need to know. If they're not very tight, you may be able to get away with just pressing on the belt. As it approaches 200° F, you should hear the fan noise rise to a mild roar and see the fan spinning a lot faster. Pay attention to changes in air temperature. It is best to have your safety glasses on from this point forward throughout the testing. The fan clutch wrench provides leverage to help remove the central nut from the fan clutch. When you move the throttle linkage to rev the engine to about three grand, fan speed picks up visibly, but it's still slow.
There are inexpensive wrenches designed specifically for this job. This time, disconnect the clutch from the fan. Decrease in power, acceleration, and fuel efficiency A decrease in performance is another symptom of a bad or failing fan clutch. The coolant level is right on, no hoses are leaking and the accessory belt is intact. Use the appropriate size of the wrench to loosen the nut. You can do this by making a note of unusual noise or temperatures while driving, inspecting the housing for oil leakage or physical damage, measuring the amount of resistance offered by the fan blades. To prevent this from happening, replace or fix a broken clutch as soon as possible.