I thought a fan clutch was supposed to pretty much stay still until it sensed heat from the rad, at which point it would grab on and spin depending on your RPMs.
Well i thought my old one was broken because it was just as hard to spin when you first start the jeep as it was when you drive up a long hill in 4LO slowly … maybe a 1/4 turn if you’re lucky.
I bought a new one, the bloody thing does the same thing. Just put it on and started the Jeep that’s been sitting for about 6–7 hrs and the fan was spinning like mad right away. I give it gas it speeds up. I let off it slows down… what the hell…
if a new one spins like this when the engine’s cold, then why even bother with a “clutch” … why not just drive the fan with the belt because that’s what it’s acting right now pretty much anyways … I don’t get it … unless the new one is buggered up also ??? .
It sounds like you’re experiencing unexpected behavior with your fan clutch, which is designed to engage and disengage based on temperature to regulate the engine cooling fan speed. If the new fan clutch is immediately engaging and spinning the fan rapidly when the engine is cold, it suggests a potential issue with the clutch itself. It’s possible that the new fan clutch is defective or not functioning as intended. It’s also worth checking if the fan clutch is the correct one for your vehicle and if it was installed correctly. If the problem persists, consulting with a mechanic or reaching out to the manufacturer for assistance may help resolve the issue.
A fan clutch is a device that connects the fan to the water pump. It controls when the fan is working based on the temperature. At low speeds, the fan works, and at high speeds, the fan stops. This helps the engine run better by reducing the effort needed to power the fan.
As someone who relies on a well-running engine, I’m a big fan (pun intended) of fan clutches! They act like a smart switch for your car’s cooling system. When the engine is cool, the clutch lets the fan spin freely, saving power and helping it warm up quicker. But if things get hot, a special fluid or spring inside the clutch kicks in, locking the fan to the engine. This pulls in cool air through the radiator, just like a giant spinning breeze, to bring the engine temperature back down. It’s a simple yet clever way to keep your engine running smoothly, no matter the conditions.
