Car News Articles 
 How Car Stuff Works (93)





How Car Stuff Works

Feb 9, 2007 - 4:17:00 PM - Print

Fan Clutch What Is It and Whats it Do

The fan clutch is an automatic device that is often used in a vehicle’s cooling system. So, when the engine is cool or even when it is at a normal operating temperature, the fan clutch will partially disengage the engine’s radiator cooling fan (which is mechanically driven).

This is normally found at the front of the water pump and it is driven by a belt and pulley that is connected to the engine’s crankshaft. This process will then save power because the engine won’t have to fully drive the fan.

But, if the engine’s temperature gets hotter than what the settings for the clutch are, the fan will then become fully engaged, this will then maintain or even lower the temperature of the engine.

You will find that most fan clutches are viscous or “fluid” (the internal friction of a fluid that is produced by movement of its molecules against each other. It is what causes the fluid to resist flowing) couplings that are combined with a bi-metallic (it’s a strip that is used to convert a temperature change into mechanical displacement and it usually consists of two layers of iron and copper) sensory system that is similar to that in a thermostat.

Sometimes fan clutches will fail on you but they are normally quite reliable so this doesn’t often happen. You will find though that a common symptom of the clutch fan failure is the car overheating when idling.

If you have a bad fan clutch, it can also cause very poor performance in the vehicle’s air conditioning system. The reason for this is because the fan also cools the air conditioner’s condenser and that is found directly in front of the radiator.

The other potential symptom if the fan clutch fails is that it will draw the air at a very high rate, so in the cold weather the heating system will blow out lukewarm air and it won’t ever deliver enough sufficient hot air.

It is best to leave the replacing of the fan clutch up to a professional mechanic, unless of course you know what you are doing. But if you are finding that the vehicle is fine on the highway, yet when you are in traffic or you are stuck at a red light and the heat gauge immediately goes up and gets too hot, then it may be time for you to get it replaced.

It is quite a simply process as the fan clutch is simply sandwiched between the can and the connecting shaft. All that would have to be done is to unbolt the fan and remove the clutch. The new one is then installed and the fan re-attached and you will then be on your way. It is advisable to may be do a coolant flush and put in a new thermostat at the same time.





comments powered by Disqus


Related Articles:
The Car Window Sticker How to Read it
Headlight Assembly
Supercar What is it?
Cyclone Green Revolution Engine How it Works
Water Pump and How it Works
Replacing Your Car’s Headlight Bulbs
What is a Supercar?
What is a GPS System?
How Does OnStar Work
Beyond Round, Rubber and Black
A Head Gasket What is It
The Alternator
What are Tweel Airless Tires?
The Hemi Engine
The GM Hy-wire

sdg
sg
?????????


Stay Updated!


How Car Stuff Works
Related Articles
Car Paint Chip Repair Options
Car Suspension and How It
The Fuel Pump in Your
What Your Car Radiator Does
Car Clutches and How they
The Car Window Sticker How
Headlight Assembly
Supercar What is it?
Cyclone Green Revolution Engine How
Water Pump and How it
Replacing Your Car’s Headlight Bulbs
What is a Supercar?
What is a GPS System?
How Does OnStar Work
Beyond Round, Rubber and Black
A Head Gasket What is
The Alternator
What are Tweel Airless Tires?
The Hemi Engine
The GM Hy-wire


Feed Button



Car Insurance Info | Newsletter | Car Classifieds | Online Car Rentals
Auto Pictures | Link To Carjunky.com



Complete List of Article RSS News Feeds


Copyright © 1999 - . CarJunky® All Rights Reserved.