What are the different types of fan clutches?

Types of Fan Clutches. The main types are non-thermal, thermal, and electronic — all of which use a silicone fluid to engage and disengage your fan. Non-thermal clutches operate solely based on the shaft speed of the water pump. At low and idling speeds, the clutch allows the fan blade to turn at almost a 1:1 ratio.

Can a fan clutch spin freely when cold?

There have been cases where fan clutches spin freely when cold, and when this happens, you have a problem in your hands. Note that there are two kinds of clutches. One operates through thermal variations, such as the one described above. The engagement and disengagement of the same will depend on how fast you drive.

How can you tell when a fan clutch is going bad?

You should be able to audibly detect when the fan clutch engages, with an accompanying rush of air. At idle, as engine temperature increases, a thermal fan clutch will engage at a certain temperature. Torque-limiting fan clutches will disengage at a certain engine speed.

How does a water pump fan clutch work?

The fan clutch is a thermostatic device, which means it operates based off temperature, and is usually mounted on the water pump, or another belt driven pulley. The fan clutch will spin loosely until the temperature reaches a certain level, at which point the fan clutch will fully engage…

How do you remove a clutch from a fan?

There are four large bolts in the center of the fan assembly that hold the clutch in place. Remove these bolts and the clutch will be free from the fan. Step 6: Install the new fan clutch. Hold the new fan clutch in place aligning the bolt holes in the same place as the old clutch.

How many bolts do you need to unbolt a fan clutch?

On many imports, four or five bolts hold the fan to the clutch, and four or five hold the clutch to the fan pulley. Before you unbolt anything, look at the fan pulley and the routing of the drivebelt.

What’s the difference between thermal and non thermal fan clutches?

However, non-thermal clutches are a lower-cost option than thermal-style clutches. The thermal fan clutch operates in response to underhood temperatures.

What should I do if my fan clutch is going bad?

Silicone fluid leaking from the fan clutch would cause this problem. When the engine is off, there are a few things you can do to check the fan clutch: Spin the fan. Electronic types might freewheel, but most fan clutches should spin with a little effort.

What happens to the fan clutch at high speeds?

At low and idling speeds, the clutch allows the fan blade to turn at almost a 1:1 ratio. At high speeds, the silicone fluid within in the clutch will lose its ability to transfer the energy from the shaft to the fan clutch body (and therefore, the fan) and the fan is then allowed to almost free-wheel, removing its load from the engine.

Where is the cooling fan clutch on a car?

Newer vehicles feature electric cooling fans controlled by a relay, but older vehicles are likely equipped with a clutch style fan. The cooling fan clutch is part of the cooling system that engages or disengages the fan depending on the engine temperature. It is typically bolted between the water pump pulley and the fan.

How does a non thermal fan clutch work?

A thermal fan clutch has a coil in the middle of the center of the front of the fan. When this coil heats up to a certain temp it engages the fan to spin at the rpm of the engine. A non thermal does not have the coil and is always engaged. So it is always spinning at the engine rpm.

What kind of wrench to use for fan clutch?

A Snap-on 36mm fan wrench (Snap-on number SP346 from Cummins Diesel Tool Set (Snap on number 2017DSP)) can be used. The water pump pulley can be held in place by one of the two following methods based upon whether the water pump pulley is pressed onto the water pump or held in place with four attachment bolts.

How does a torque limiting fan clutch work?

A torque-limiting fan clutch reacts to engine speed. A centrifugal valve opens to allow the flow of heavy silicone fluid, locking the fan blades to the pulley. At idle and low engine speeds, this fan clutch is fully engaged, gradually disengaging as engine speed increases.

How do you test a fluid coupling fan clutch?

Step 1 With the engine off, inspect the fan blades carefully. Look carefully around the fan clutch for signs of oil leakage. Grab the fan assembly with your hands and move it back and forth. Try to spin the fan with your hands. Turn on the engine and let it idle. Test the fluid-coupling fan clutch visually with the engine running.

How to remove and replace clutch assembly in 1995 Ford?

Remove the lower engine-to-transaxle bolts and slowly lower the transaxle out of the vehicle. Apply a thin coating of suitable grease to the spline of the input shaft. Place the transaxle onto a suitable transaxle jack. Make sure the transaxle is secure. Raise the transaxle into position.

How can you tell when a fan clutch is engaged?

What happens to the fan when the clutch goes bad?

The cooling fan clutch is part of the cooling system that engages or disengages the fan depending on the engine temperature. It is typically bolted between the water pump pulley and the fan. When a fan clutch goes bad, your fan may run at all times, or it may not run at all.

Is it safe to use a fan clutch wrench?

A fan clutch tool is one of the most overlooked tools in a mechanic’s collection. Fortunately, AutoZone offers the lowest prices on loaner fan clutch wrenches for your convenience. Driving around with an engine that runs too hot is dangerous. Since engine temperature increases at higher speeds, driving at a safe speed can become challenging too.

What’s the difference between standard and heavy duty fan clutches?

Standard-Duty Thermal Fan Clutch: This design turns the fan at 60-70 percent of the water pump shaft speed when engaged, and 20-30 percent when disengaged. It’s made for fans with a lighter pitch. Heavy-Duty Thermal Fan Clutch: This fan style turns the fan at 70-90 percent of the shaft speed when engaged for increased cooling.

Is there a fan clutch for a Ford PowerStroke?

Fan Clutch Pulley Holder Set for 6.0 Liter Ford Powerstroke – 3950 . Usually ships within 5 to 7 days. . Only 10 left in stock – order soon. . . . .

When does Ford 6.0 fan clutch pulley holder come out?

Fan Clutch Pulley Holder Set for 6.0 Liter Ford Powerstroke – 3950 . Usually ships within 5 to 7 days. . Only 10 left in stock – order soon.

What are the different types of fan clutches?