How do I know if my viscous fan is bad?
How do I know if my viscous fan is bad?
To confirm the diagnosis, start with this simple test: Spin the fan as hard as you can on an engine that has not been started that day. If the fan rotates more than five times, you can bet the clutch is bad. You should feel some resistance and the fan may spin up to three times, depending on the ambient temperature.
How do you tell if your fan clutch is stuck engaged?
Excessively loud cooling fans If the fan clutch gets stuck in the engaged position, which is not uncommon, it will cause the fans to fully engage even when it is not desirable for them to be on. This may result in an excessively loud engine from the fan blowing at full speed.
Should a viscous fan spin freely?
The fan should move freely by hand when the vehicle is off. Any strong resistance means its locking up. Thats when they get noisy.
Can a faulty viscous fan cause overheating?
Viscous fan couplings are used on vehicles (cars and trucks) with inline engine positions, mainly rear wheel drives. A faulty fan can cause an engine to overheat while idling or in heavy traffic, or poor mileage and loss of horse power. Viscous fan couplings are located between the water pump pulley and the radiator.
Should a fan clutch spin freely?
What temperature does a fan clutch engage?
about 170°F
At what temperatures do fan clutches engage? Answer: Most fan clutches engage at about 170°F air temperature (about 180-190°F engine temperature). They reduce the temperature about 20°F before disengaging.
How much does it cost to fix a fan clutch?
A fan clutch replacement cost will range anywhere from $75 to $200 for just the part, without the labor costs. When labor is accounted for in the overall fan clutch replacement cost, the total price can range between $285 to $500 to replace the fan clutch only.
Will a bad fan clutch affect AC?
Absolutely, a bad one can damage your air conditioning system, as it acts as a heat exchanger for the air conditioning unit. The engine fan keeps the condenser cool which helps to keep the convertible’s AC system running smoothly.
Can you lubricate a fan clutch?
A thermostatically controlled fan clutch typically drives the cooling fan. Krytox™ lubricants have low volatility and high viscosity, providing long life and excellent lubrication to the fan clutch bearing under these high temperature conditions.
What temp does a viscous fan kick in?
Your radiator fan should kick in at about 200 degrees Fahrenheit. If you notice your vehicle is overheating or at the very least running hotter than it normally does, listen for the fan to see if you can hear it.
