How does a fan clutch work

how does a fan clutch work That means that when there is no excess heat, the fan can work at lower speeds to lower the engine Bad fan clutch in Chevy Silverado cause AC issue because compressors need normal airflow to re-cool the refrigerants for efficient working. This engine cooling fan clutch directly replaces the original equipment part on specified vehicles. Your truck actually warms up. 6 mm). Apr 13, 2009 · As the commanded state of the fan clutch increases, so does the ON time of the relay. If the fan cannot be rotated by hand or if there is a rough grating feel as the fan is turned, the clutch should be replaced. 6. The air will not properly move through the compressors, and as a result, its AC will Mar 31, 2009 · Fan Clutch. Obviously, if a substantial amount of fluid is missing, the clutch won't spin as fast as it Aug 01, 2000 · 3. When the clutch is cool and disengaged, most of the silicon fluid is stored in the reservoir allowing your fan clutch to slip relative to your water pump shaft thereby spinning at a lower RPM than the water pump. Sep 03, 2021 · Cooling Fan Relay - What Does It Do - Failure Symptoms - Basic Testing Circuits that have a high current draw, usually use a cooling fan relay. This creates friction between the drive plate and the housing, causing the fan to spin. Just remember to re-torque the fan bolts as specified in your manual. The two terms "fan clutch" and "fan drive" are interchangeable. Mar 13, 2018 · How this works In the event of fan clutch slippage, heat builds up at the outer edge of the Piston Friction Disc (PFD). Jan 26, 2004 · 4,213 Posts. It provides airflow when needed. when the clutch is cold, it engages and you can hear the fan roaring in the morning. A flex fan always pulls air at low rpms and disengages (flattens out) and pulls less air at high rpms whether even if the engine is running The fan clutch wrench provides leverage to help remove the central nut from the fan clutch. Living in cooler climates does have it's advantages. If the EV fan clutch has a condition that warrants replacement, a D TC (Diagnostic Trouble Code) should set and/or Sl diagnostics should lead to the replacement of the fan Jan 29, 2007 · link - Fan clutch - Wikipedia, the free encyclopedia and as for which water pump to use, you can use either. The improper conditioning of a new fan clutch. Sep 04, 2007 · hello. It is one of the reasons the 5 blade has that odd arrangement of blades. One operates through thermal variations, such as the one described above. Flywheel –. Mar 16, 2013 · A few things you can do to stabilize this, first off, ALL of these things should have a small electric pusher fan rigged to come on with the ac to cool the condenser, this will aid your ac performance in traffic when your fan clutch doesnt like to kick on, it will also help to stabilize the temp when running with the ac on. This ON time directly effects the amount of time the solenoid, which is internal to the fan clutch, is energized. Dec 08, 2020 · This is a thermostatic engine cooling fan that can work at lower temperatures when cooling is not necessary, which allows the engine to warm up quicker and relieves the unnecessary load from it. The most common sign of a fan clutch failing is an engine which becomes too warm or overheats while sitting in traffic—with this type of failure, the fan does not engage as the engine becomes hotter. ($15. Description Sep 14, 2019 · The fan clutch unit is approximately 1 foot tall by 1 foot wide. I presume this is from the viscous fluid settling into the clutch working space when shut down for an extended period. This can build a lot of heat without any natural airflow through the engine compartment. when your engine temp gets above "X" temp (mostlikely around 195-200) the thurmo coil enguages the clutch to spin the fan. Also, the signal sent to engage the clutch could be sent by a variable. If your fan clutch fails to engage, the engine can overheat. a short pump is just that, short, it saves a few inches over the long pump. as you engine heats up it will again gradually re-engage and if it gets hot enough, eventually lock completey tight. In the event of fan clutch slippage, heat builds up at the outer edge of the Piston Friction Disc (PFD). When the fan has to function, the oil is pumped through the shaft. This special viscous clutch is much like the viscous coupling sometimes found in all-wheel drive cars. Alot of fan clutches spin for a few seconds when first started. By opening and closing the fluid port valve, the PCM can control the cooling fan clutch speed. Electronic Fan Clutch – the electronic-viscous clutches engagement is controlled by the signal that tells the internal solenoid to open up. When working properly, the fan clutch will react to the heat discharging from you radiator by spinning faster or slower depending on the cooling needs of your engine. When the clutch engages the fan blade starts to operate pulling air though the radiator to cool the engine down. 0. Viscous fan clutches are belt-driven and found on many older rear-wheel-drive passenger cars. The inner ring is taller than the others. The fan clutch is designed to improve the vehicle’s cooling system efficiency while reducing the load on the engine and loss of energy caused by the fan itself. How the Fan Works When the car is started and the engine is cold, the fan clutch is released and is freewheeling. Take a broom and use the bristle end to try and stop the fan. It ensures that the fan will rotate at just the right speed to keep the engine from overheating, and reduces drive to the fan when it is no longer needed. Aug 08, 2021 · The fan clutch is design with either an electronic controlled activation device or a temperature sensitive spring at the front of the clutch to tell the clutch when to turn on and engage to the input shaft. Since you will be working near the radiator, be careful not to damage the radiator fins, since that could cause overheating. 1. Jun 30, 2021 · This guide will go through the reason why your fan clutch may be faulty and how to diagnose step-by-step Engine fan consume the largest portion of the energy supply from the engine, up to 10% Fan clutch functions includes: Reduce fan energy consumption Reduce friction and noise Regulate engine temperature Reduce dirt and impurities Saves fuel How viscous fan clutch works When the engine is in Jan 13, 2008 · They work like this. The fan clutch’s job is to control when the fan comes on and off. i personally prefer a long pump because i think the accessories look Apr 13, 2009 · As the commanded state of the fan clutch increases, so does the ON time of the relay. This clutch is positioned at the hub of the fan, in the airflow coming through the radiator. Gently push the fan blades towards and away from the radiator. A light smear of silicone fluid could be normal seepage--no seal is perfect. Most original non-clutch style fan mounted with bolts that go all the way through the fan, through the spacer, and into the water pump hub. This shaft receives it's rotation from the engine itself. As mentioned, the stock clutch fan is attached to the water pump shaft. ) on the adapter. When the solenoid in the fan clutch is energized, it opens the spring loaded valve and allows fluid to flow from the storage chamber to the fluid Viscous Fan Clutch. The fan clutch is a thermostatic control that operates the radiator fan independent of engine speed. How does a viscous fan clutch work? In a nutshell the viscous fan clutch is made up of two halves mated to each other and capable of rotating semi-independently of each other. 7L Diesel April 7, 2015 Dodge Diesels are fitted with an electronic viscous fan clutch, which is electrically activated by the ECU when the engine temperature reaches high temperature or the air conditioning head pressure reaches 240 to 270 lbs. Horton fan clutch systems have a patented System Sentry. You are using the wrong term seized. Grasp the fan blade tip, and apply fore and aft pressure. If it does stop dont count it as bad yet. The thermostatically-controlled fan clutch is operated by a fluid coupling. Oct 12, 2020 · A thermal fan clutch uses a thermal spring (bi-metal temperature sensor) placed on the face of the clutch to gauge heat, and based on this is, it engages or disengages. Dec 28, 2017 · The fan clutch pulley and bracket do resemble a water pump on a domestic engine, so I guess I can see how an ignorant mechanic could make that mistake. Fan Clutch Failure Symptoms. Its ability to turn on and off helps fuel economy and requires less horsepower to operate. Dec 08, 2014 · A thermal clutch fan operates using silicon fluid as a viscous coupling medium. i personally prefer a long pump because i think the accessories look Fan Drive (or Fan Clutch) The purpose of a fan clutch with a mounted fan is to help ensure that engines do not exceed certain operating temperatures, which are usually set by the manufacturer. There have been cases where fan clutches spin freely when cold, and when this happens, you have a problem in your hands. The main advantage of a clutch fan is that the fan engages when the engine runs hot and disengages when its not needed. When the engine temperature rises, the coupling engages. 2. May 22, 2021 · How does a viscous fan work? The fan hub is a mechanical coupling that operates based on the ambient temperature. the main difference other than space, is how your accessories will mount in relation to the water pump. Feb 04, 2019 · How this works. A new fan clutch friction disc lining is somewhat like a new brake lining- it needs to be broken in. The fan clutch was created in the 1960’s for the purpose of saving power on the engine. The space between the front cover of the fan clutch and the driven plate is the oil storage chamber, where the high viscosity silicone oil is stored. A thermal clutch fan will make use of the high engine speed to move maximum air. The clutch is mechanically attached to the waterpump shaft. #2 · Jan 27, 2004. Note that there are two kinds of clutches. A centrifugal valve opens to allow the flow of heavy silicone fluid, locking the fan blades to the pulley. The air will not properly move through the compressors, and as a result, its AC will Feb 27, 2010 · A belt-driven fan is also a good choice if you are having a cooling problem at higher engine rpm. Jan 13, 2008 · They work like this. Your temperature does not significantly increase when you come to a stop after driving 25+mph. ) Horton Fan Clutch Systems and Troubleshooting. To engage the fan, internal valves open and allow the fluid to fill the working area of the clutch. Do NOT replace an EV fan clutch for fan noise. Dorman Products - 622-001 : Electronic Radiator Fan Clutch. The fan clutch is just what the name says, it is a mechanism that will clutch the fan on and off depending on the need for more or less cooling air to flow thru the radiator. The air will not properly move through the compressors, and as a result, its AC will Aug 27, 2015 · Fan noise or an excessive roar will generally occur continuously, however, under all high engine speed conditions (2500 rpm and up) if the clutch assembly is locked up due to an internal failure. A flex fan always pulls air at low rpms and disengages (flattens out) and pulls less air at high rpms whether even if the engine is running Dorman Products - 622-001 : Electronic Radiator Fan Clutch. When the engine is started (cold start) the clutch should be "released" alowing the engine to warm up, you may see the fan spin ,this is ok as its drag from the spinning water pump alows it to spin slowly. May 27, 2015 · I know on my 96 the fan clutch has never engaged the entire time I've owned it. The trick is to make sure you pull up on the 2 coolant hoses. The oil is held within the reservoir when the fan is disengaged. Learn what makes a viscous fan clutch operate. A lot of off-road vehicles drive at slow speeds with high engine rpm. (The fan’s diameter, speed, number of blades and pitch all affect the actual power draw. There is enough room to remove the assembly as a unit without taking off the shroud. When the solenoid in the fan clutch is energized, it opens the spring loaded valve and allows fluid to flow from the storage chamber to the fluid PROPER DIAGNOSIS PROCEDURE: Start with a cold engine. If the fan clutch requires repair, take the vehicle to a qualified mechanic. So I would suggest going with a 5 or 6 blade. a long pump is a few inches longer. $135. When cold, the clutch slips more and the fan spins far less than the engine rpm. You will need to move the fan to the Drivers side a little and jimmy it up. As the engine tuns so does the clutch and fan. From what I can see, they pretty much all work this way. The “drive disc” spins freely in the housing except for the silicon fluid. Once the engine stops running, the fluid just settles into the bottom. Oct 01, 2017 · I recently replaced the fan clutch and fan on a '05 4. The cooling fan clutch speed is measured by a Hall-effect sensor and is monitored by the PCM during closed loop operation. Then, the fan attaches to the clutch housing. I got my fan clutch off by putting a 18" pipe wrench on the nut and whacking the pipe wrench with a hammer. This heat works its way toward the center of the fan clutch. The fan clutch is a coupling device that is located between the water pump shaft and the fan. The cooling fan clutch actuator valve is activated with a pulse width modulated (PWM) output signal from the PCM. The exciting thing about these fans is that their RPM depends on the temperature. Quote. The air will not properly move through the compressors, and as a result, its AC will Mar 29, 2006 · Replace the fan clutch. Aug 01, 2000 · 3. Its drive shaft attaches to the water pump. Ensure the fan does not contact other objects. The air will not properly move through the compressors, and as a result, its AC will May 26, 2010 · The fan clutch is an important part of your vehicle's engine cooling system. 3. The fan is usually located between the radiator and water pump in the engine Aug 20, 2007 · The fan on my '99 always runs briefly (30 seconds - 2 minutes ) after a cold start regardless of the outside temperature. The flywheel is equipped with friction surface OR a friction disc is bolted to outer side of flywheel. When the fan is locked up, the cooling fan is permanently engaged. If your's still sounds like a jet after fifteen seconds during a cold start up, then I would call it bad. The fan clutch spins loosely until the temperature in the engine reaches a specific level of heat, engaging the clutch and simultaneously allowing the fan to perform efficiently. If it spins more than three full rotations, this indicates that it may be prone to slipping. We have 4 fans for fan clutches with reverse rotation. The 2 halves opened. S. Jun 09, 2005 · Does it have an oily waxy residue? That would be a sign of a leaking clutch. How Does A Relay Actually Work Jun 24, 2020 · The new fan clutch is moving more volumes of air past the radiator thus making more noise. Nov 10, 2016 · A fan clutch is a temperature-controlled coupling between the water pump shaft and the fan which allows the fan to be operational at low speeds and disconnected at higher speeds. The fan clutch has a fluid coupling partly filled with silicone oil designed for just Viscous Fan Clutch. It is a thermostatically controlled device that when Jan 23, 2020 · How does a manual clutch fan work? Most fan clutches are filled with a silicone-based oil. Now that we know how the cooling system works, let's be clear about the function of the fan, and how the clutch assembly works. This causes the roaring noise. Mine passed the stop-engine test before I replaced it but I think it needed replacement. At 10 inches (254 mm) radius from the center, the blade tip should not move more than 1/16 inch (1. Mar 29, 2020 · The fan drive viscous clutch (or fan clutch for short) is a silicon fluid filled coupling with a bimetallic coil that is attached to your Jeep’s fan. The air will not properly move through the compressors, and as a result, its AC will When the clutch shoe inside the part gets stuck, it fails to disengage. This causes the fan to lock up on the input shaft. You can't tell if a fan clutch is working by how it turns when the engine isn't Fan Clutch test First, lets discuss what the fan clutch does and why it is there. Once the temperature goes up, the clutch engages, and the engine power drives the fan. I then bolted a generic fan from JC Whitney or any good Auto parts store. It increases or decreases airflow over the radiator depending on how much cooling is needed. Excessive play means the bearings in the clutch are shot. Apr 03, 2020 · The Fan Clutch is an important part of your cooling system. Feb 27, 2010 · A belt-driven fan is also a good choice if you are having a cooling problem at higher engine rpm. To engage, the valves must open, thrusting the oil into the working area. The second style of fan is the clutch fan. Verify the front of the clutch is not covered in filth and slime because the silicone fluid has started to leak out. 9L Dodge Ram Diesel, 6. after a few minutes of run time, it will gradually kick back out to almost a freewheeling amount of engagement. An OEM fan clutch, if still available may work better for you. When damaging levels of heat reach the System Sentry the fuse will melt. Then it will engage the clutch and will allow the fan to perform efficiently. Price range for all vehicles. The fan won't be stiff. This length of time depends upon the duty and/or specifications of the vehicle tested. This allows the fluid to either flow out, or be contained inside the hub. However, if this part should stop working the entire cooling system in your car is affected. 42 rear end, you will need Derale Thermal Fan Clutch, # D22142. How Does A Relay Actually Work Jun 09, 2005 · Does it have an oily waxy residue? That would be a sign of a leaking clutch. A fan clutch is a thermostatic engine cooling fan that can freewheel at low temperatures when cooling is not needed, allowing the engine to warm up faster, relieving unnecessary load on the engine. There are two types of fan clutches, a non-thermal clutch fan that rotates based on shaft speed and a thermal clutch fan clutch that reacts to system temperatures. Jan 04, 2018 · The clutch pedal is that third one you'll find in manual transmission cars, the one on the far left a driver must press for every gear change. Jun 21, 2004 · The test to verify it is the fan clutch is to unplug the wiring connector, run the engine for 2 minutes at 2000 rpm. When at freeway speeds, the temp can be close to normal. The input side is coupled to the engine either directly or by means of a belt and therefore rotates in a fixed relation to the engine. May 26, 2010 · The fan clutch is an important part of your vehicle's engine cooling system. This clutch will only work with the spin on fan clutch so if you have the bolt on clutch you'll have to upgrade it as well. This will allow silicone drive fluid to go between the storage reservoir and the area that tells the clutch to engage. DM Advantage Two-Speed Fan Clutch alternate between eddy current and spring-actuated cooling. 08 or 3. It also reduces drag on the engine when not needed. Sut the engine off and see if the fan turns free, if it does it is a control problem, if it is still stiff it needs a new clutch. Aug 05, 2009 · 5,353 Posts. May 22, 2012 · It was designed to allow the fan to operate only when the temperature of the engine requires extra cooling. You can stop any of them even with a good clutch so thats not the part your looking for but if it seems like it doesnt want to stop to the point its scaring you then stop there and rest assured the fan clutch is fine. Bad fan clutch in Chevy Silverado cause AC issue because compressors need normal airflow to re-cool the refrigerants for efficient working. 00 U. The air will not properly move through the compressors, and as a result, its AC will Mar 16, 2013 · A few things you can do to stabilize this, first off, ALL of these things should have a small electric pusher fan rigged to come on with the ac to cool the condenser, this will aid your ac performance in traffic when your fan clutch doesnt like to kick on, it will also help to stabilize the temp when running with the ac on. It is a thermostatically controlled device that when Nov 06, 2001 · The fan clutch is a small fluid coupling with a thermostatic device and controls a variable-speed fan. A fan clutch that stays engaged will suck HP and gas big time. 68 - $612. If the blade moves more than specified and the excess cannot be attributed to pulley/water pump bearing wear, fan blade The clutch assembly consists of many small parts but following are the major parts. If you can drive stick , then you already knew that. A non-thermal fan clutch is always engaged and is dependent on engine revolutions per minute (RPM). You will need to measure the space for a fan under the hood to determine which size to use. The original fan that the fan clutch replaced was much noisier and consumed too much energy. You will need to remove the entire cooling fan assembly in order to replace the fan clutch. This heat works its way toward the centre of the fan clutch. At idle and low engine speeds, this fan clutch is fully engaged, gradually disengaging as engine speed increases. The thermal fan clutch will be engaged for a short period of time during engine warm up. Do NOT replace an EV fan clutch unless a specific condition related to the EV fan clutch is identified using Sl diagnostics. I went with a hayden HD clutch and flex-a-lite 6 blade fan. Aug 03, 2009 · Crank the vehicle. The fan is not directly attached to the shaft, it is actually bolted to a viscous clutch. Jan 29, 2007 · link - Fan clutch - Wikipedia, the free encyclopedia and as for which water pump to use, you can use either. I replaced my fan clutch with this solid, custom made adapter. This improves power and fuel economy. A failed fan clutch will cause overheating when in traffic as the clutch does not engage to draw air across the radiator. If your truck does not have air conditioning and it has 3. Sep 21, 2018 · But when they do run, there is a cost. A bi-metallic strip on the outside of the hub heats and cools, and expands or contracts, which opens and closes a valve inside the viscous hub. It is moving the air and cooling down the engine. These fans are needed at slow speeds, typically below 35 mph and at idle. This means the fan is not circulating air in the How does a torque limiting fan clutch work? A torque-limiting fan clutch reacts to engine speed. Hope this helps. The Fan Clutch allows the fan to operate at lower speeds and effectively detach at higher How does the viscous fan clutch work? Working principle: silicon oil fan clutch, using silicon oil as medium, using silicon oil shear force to transfer torque. If the EV fan clutch has a condition that warrants replacement, a D TC (Diagnostic Trouble Code) should set and/or Sl diagnostics should lead to the replacement of the fan Mar 31, 2020 · In any of these cases, the clutch would not work as it should. There is a thermal element in the clutch. Jun 24, 2020 · The new fan clutch is moving more volumes of air past the radiator thus making more noise. 17 Inch Fan . A typical 32-inch multi-blade fan on a high-horsepower diesel truck can draw 25 to 30 hp. When the engine is at operating temp, you can use a rolled newspaper technique to see if the clutch is engaged. Lift the hood. May 25, 2010 · (use the Internet. If the fan clutch has oil seepage or if it's loose replace the thing before it makes your new water pump go bad. Then test the fan clutch by giving it a good push. When the engine is cool or functioning at a normal operating temperature, the fan disengages or slows to a required speed to assist in regulating the engine temperature. As the rough surface of a new fan clutch disc is engaged and disengaged a number of times, the surface will become smoother, providing more surface contact and the capability of handling higher Apr 07, 2015 · Tech Tip: Electric viscous fan clutches in 2003-09 5. The fan clutch is spinning freely until the temperature reaches a specific heat level. A sure sign the clutch is going bad is the engine is overheating when not moving. The air will not properly move through the compressors, and as a result, its AC will These fans have a thermostatically controlled viscous clutch. If you have a thermostatic clutch type -- look for the thermostatic spring at the front of the clutch -- the fan should not turn until the engine reaches operating temperature. The “drive disc” and the “front half” share these closely spaced rings. It is these rings, and the silicon fluid in the gaps between them that couple the system together. As a result, using a cooling fan relay, solves this problem. The flywheel, mounted on the crankshaft, keeps on running as long as the engine keeps running. Due to decreased silicone levels and faulty thermostatic spring, the radiator cooling fan will not perform its function. Clutch fans almost always work better than flex fans. You will need a fan that is set up for reverse rotation. The thermal fan clutch engages more as the system heats up and pulls more air through the radiator. Longest fan runs are at startup after the truck has not driven for several days. They contain a drive and driven plate with annular grooves that fill with a thick viscous silicon fluid. Sep 21, 2010 · The fan clutch works a bit like a torque converter, but with the fluid bypassing through slots that are opened and closed based on the temperature of the bimetal coil. You can ask the customer a few follow up questions to determine whether the fan clutch is the culprit behind the roaring noise. Sep 12, 2011 · The clutch does not have to be reprogrammed but you do have to wait until the vehicle is completely cool before you begin work. Apr 07, 2015 · Tech Tip: Electric viscous fan clutches in 2003-09 5. I even tried modding the spring to no avail. Detailed animations show internal components. Nov 06, 2001 · The fan clutch is a small fluid coupling with a thermostatic device and controls a variable-speed fan. When you are doing the job you can check for roughness and/or play in the idler, tensioner, water pump etc and replace as needed. While using eddy current, the fan clutch turns the fan at a lower speed, which reduces operating noise, increases available horsepower for auxiliary systems and minimizes radiator abrasion from dust and debris. If you don't have access to a machine shop Rob Roe (87 XJ-S) requested Flex-a-Lite to custom Jan 05, 2011 · When you first start it cold, you should hear fan roar which fades within 1 minute or so as the fan clutch warms up. fan drive. The air will not properly move through the compressors, and as a result, its AC will Jan 02, 2009 · There is also the problem of mounting the fan clutch to the water pump hub. I decided to replace the only weak link in the mechanical fan, The fan clutch. Fan Clutch test First, lets discuss what the fan clutch does and why it is there. #5 · Aug 6, 2009. The only alternative is to put a standard duty unit in if you feel your cooling system can still sufficiently cool the engine. The first time I realized it might not be doing much, I was driving downwind on the beach and noticed the temps rising slightly. RE: Fan w/Clutch Problem IP: Logged Message: Hmmmm, If the water pump went bad, the fan clutch could be the reason why. Jul 12, 2005 · It is not that difficult to test thermal fan clutches. The temperature is detected by a bimetallic sensor system or by an electronic control. The air will not properly move through the compressors, and as a result, its AC will Jan 15, 2016 · Fan Clutch Replacement Cost. The oil is held in an internal reservoir when the fan is disengaged. The fan clutch has a fluid coupling partly filled with silicone oil designed for just Do NOT replace an EV fan clutch for fan noise. Don't over do it on the fan blade, there can be a problem where the fan blades obstruct the air (clutch disengaged on the highway). Most fan clutches are filled with oil to enable smooth control. do a web search on how a thermal fan clutch works). How Much Does a Fan Clutch Replacement Cost? A replacement fan clutch's price may vary because of multiple factors, such as it's size, type, and the application it's intended for. As temperatures increase, the clutch engages so that the fan is driven by engine power and moves air to cool the engine. If it passes these criteria, your fan clutch still works as it should. 60. May 05, 2010 · Remove the 4 nuts allowing you to pull the fan/clutch assembly away from the engine. Jun 30, 2021 · This guide will go through the reason why your fan clutch may be faulty and how to diagnose step-by-step Engine fan consume the largest portion of the energy supply from the engine, up to 10% Fan clutch functions includes: Reduce fan energy consumption Reduce friction and noise Regulate engine temperature Reduce dirt and impurities Saves fuel How viscous fan clutch works When the engine is in PROPER DIAGNOSIS PROCEDURE: Start with a cold engine. May 26, 2010 · Fan Clutch Mechanics. Most cooling fans use electric motors, that have a moderate to high current draw. The fan clutch works by regulating how fast your cooling fan runs, depending on your engine's temperature and speed. You can't tell if a fan clutch is working by how it turns when the engine isn't Jan 23, 2020 · How does a manual clutch fan work? Most fan clutches are filled with a silicone-based oil. your fan clutch is operating exactly as it is designed to do. As the rough surface of a new fan clutch disc is engaged and disengaged a number of times, the surface will become smoother, providing more surface contact and the capability of handling higher How does the viscous fan clutch work? Working principle: silicon oil fan clutch, using silicon oil as medium, using silicon oil shear force to transfer torque. To enhance the automatic engagement and disengagement of the fan, fan clutch oil is held inside the reservoir by valves. When air temperature is sufficient enough to activate the bi-metallic spring, the fan clutch should engage. This allows the engine to operate more efficiently by removing the load that the fan places on it. If the fan rotates when you turn on the engine, or the fan does not work after four or five minutes when the engine reaches operating temperature, replace the clutch. ( 103) One of the most important parts within the cooling system of your vehicle is the fan clutch. It is engineered for durability and made of quality components to ensure proper cooling system operation when the original fan clutch has failed. It’s not a part that comes up often, as it’s usually pretty consistent. This allows air pressure in the fan clutch to drop, disengaging the fan clutch immediately. how does a fan clutch work

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