How do you know when to replace fan clutch?
How do you know when to replace fan clutch?
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.
When do you know it’s time to replace the fan clutch?
According to Hayden, here are some signs your fan clutch might need replaced: Fan spins excessively when engine is stopped (three or more times when hot engine is shut off). Poor A/C performance at idle or low vehicle speeds. Fan speed does not increase when engine is hot.
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.
What is an electric fan clutch?
The fan clutch is a cooling system component that controls the operation of the engine cooling fans. While many newer vehicles now use electric cooling fans to keep the engine cool, many older vehicles used a mechanical fan clutch to control the fans.
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.
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.
According to Hayden, here are some signs your fan clutch might need replaced: Fan spins excessively when engine is stopped (three or more times when hot engine is shut off). Poor A/C performance at idle or low vehicle speeds. Fan speed does not increase when engine is hot.
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 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.
