Always check for manufacturer's specifications for any special procedures. If you suspect the problem is a locked-in fan coupling, but dont know what fan clutch symptoms to look for, then youre in the right place. 0000049576 00000 n If not, it's defective. In most cases, fan blades are designed to flex up to. adobe:docid:photoshop:2ce534b1-d8a3-11d8-a54e-a63691f3af4c hbbd``b`:$@. If your unit has one, keep an eye on the temperature so youll know about when the fan speed should begin ramping up. As you could imagine, trying to stop a locked fan with a rag would not be a pleasant experience. With more than eight years of experience, he specializes in providing maintenance and repair services for both individuals and companies. A binding fan clutch will typically be accompanied with warm air flow from the A/C, since the fan isnt turning the way it should be. Fan Clutch Symptoms of a Locked-in Fan Clutch. Consider the symptoms listed above and be aware of potential failure. You are using an out of date browser. 0000001342 00000 n Here, you can see where the fan and fan clutch are driven by the engine. A failing fan clutch could leave you stranded with expensive repair bills, so pay attention to these symptoms. Engine fan consume the largest portion of the energy supply from the engine, up to 10%. We use cookies and similar web technologies to recognize your repeat website visits and preferences and to analyze traffic. 0000036305 00000 n The pwm feed is positive so if that breaks it defaults to unlocked. . It relies on temp sensor to detect temperature and send signals through ECM/ECU and switches the clutch fan to different levels accordingly. Posted - 02/07/2008 : 5:47:26 PM. By clicking I Accept on this banner you consent to the use of cookies unless you disable them. Time for a Radiator-Heater Core Flush? You could also put 12v+ to the white wire at the clutch (or at the relay if you can figure out which terminal it is). 0000021244 00000 n How to Test a Fan Clutch | Hot Rod Forum To learn more about cookies, including steps for disabling, view our Privacy Policy. When the engine is off, there are a few things you can do to check the fan clutch: The internal combustion engine generates a lot of heat, which the engine cooling system is tasked with moderating. uuid:2ce534b2-d8a3-11d8-a54e-a63691f3af4c 0 4294967295 Our community has been around for many years and pride ourselves on offering unbiased, critical discussion among people of all different backgrounds. From the exterior, a locked-in fan clutch will be hard to diagnose with just a visual check. You do realize that you are posting things that don't work for the everyday person trying to figure out his problem. The fan clutch unit is approximately 1 foot tall by 1 foot wide. The fan clutch experts at Kit Masters can help you identify your fan so that you can determine the correct replacement. . Registered in England. Solenoid coil / Actuator check - Try rotating solenoid coil / actuator and see if it's stuck, 5. May daughters use it now. <<59055635F8F5FE459E851E498E113946>]/Prev 686576>> One smart strategy is to have your vehicles fan clutch and water pump replaced together. It will also set a code if the fan clutch is not running at the set RPM - too slow or too fast. The clutch is full of viscous fluid, so the air friction on the fan starts overcoming the friction of the fluid in the clutch and it stops accelerating with the engine. Engine fan check - See if any damages on fan, 2. A small amount of resistance always keeps the fan spinning, but its basically free-wheeling until the fan clutch engages. "By perseverance, study, and eternal desire, any man can become great." Right when it stop it tried to "tick" forward as I was holding it. A locked-in fan clutch can experience increased vibrations that will pass on to the radiator fan and other parts of the engine, with the bearing no longer running at the the differential speeds that it should. There are three types of fan clutch, depending on the vehicles design. Global Parts Distributors has the electronic fan clutch assembly: part number 2911297. 42 36 0000001551 00000 n The wires run in a rubber hose in front of the fan. Thank u LB. 0000053141 00000 n 0000025483 00000 n Troubleshooting Common Condenser Fan Problems, Signs and Symptoms of Spark Plug Problems, Reasons Why Your Car's Idle Speed Might Be Too High, Engine Ignition and Cam Timing for the Novice, Troubleshooting Engine Driveability Problems: Surging or Misfiring. Here's a list of the most common fan clutch noises and what each one could mean: 1. It may not display this or other websites correctly. If you find youre experiencing any of these fan clutch symptoms make sure to get your fan clutch checked out properly by a professional technician to correctly diagnose the issue. Never seems to lock up completely (or even the 90%) I tried applying 12v to the clutch directly (white wire) but there was no speed change. Bad Fan Clutch Symptoms - In The Garage with CarParts.com Coolant temperature sensor circuit problems can set a DTC. This is considered normal and may last more than 3 minutes in cooler climates or at lower driving speeds resulting in fan roar. 4.Engine Fan Test Results You will need to monitor the entire fan test while it is running to determine if the fan has passed or failed. Check the gauge for proper operation (especially electric gauges). They make a loud whirling sound at highway speeds and when revving the engine.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'freeasestudyguides_com-medrectangle-4','ezslot_3',116,'0','0'])};__ez_fad_position('div-gpt-ad-freeasestudyguides_com-medrectangle-4-0'); Because the crankshaft drives this fan, check the accessory drive belt for wear and glazing. Too fast to try and slow it with a rag. If you are getting that tugging, the clutch is working. There is a very easy way to test the fan clutch for staying fully engaged all the time. Quick tutorial on how to refill your viscous fan clutch with proper fluid and reseal the chamber. We recommend that you check the transducer and fan clutch assembly. This condition will cease shortly upon disengagement. If you want to determine the extent of the problem, you can use a probe thermometer to read the exact temperature of the air flowing through the radiator. How to Test a Fan Clutch: 11 Steps (with Pictures) - wikiHow %%EOF Fan Clutch. Initially I get a Trans Flush at Hello, everyone. My issue was the fan would only engage intermittently using the Tech 2 and commanding full engagement. The engine temp reads a little low all the time, about 2-3 notches below 210. rS&cD5Ts6'E7FdU()8GHVe*9:IJWXYZftugvwhijxyz i !1AQa"q2#BR 3br$Csc%4S5&DTdEU' Adobe Photoshop CS Windows endstream endobj startxref If it feels the same, then I would assume the clutch is done. The fan clutch won't dis engage. Ed and the InTechgrity Automotive Excellence Team are approved by the American Automobile Association (AAA) for repairs and are Automotive Service Excellence (ASE) certified. Squeaks while doing it too. One of two conditions is possible. During engine start up, the EV fan clutch will engage and match engine speed for up to 3 minutes. Wire check - See if the wire to ECU is normal, 4. A slipping fan clutch can result in failed cooling, increased engine strain, and poor fuel efficiency, which is why its important to evaluate the condition your vehicles fan clutch if you suspect it might be wearing out. Traces of oil are perfectly normal, and wont necessarily be an indication that your clutch is shot. Thank you. Appreciate the help. These issues will draw the PCM's attention, and it will turn on the check engine light to warn you about them. It will regulate engine temperatures more efficiently compared to older direct fuel injection engine models. Both parts tend to wear out at about the same time, so if one is giving you trouble, the other may not be far behind. The valve in the EV, electro-viscous fan clutch, is intended to be controlled by PWM with an RPM sensor to provide feedback and compensate for age related slowdown. If the temperature gauge is starting to climb and the fan is still not working, let go of the fan and turn on the heater to cool the engine, Turn off the heater and warm up the engine completely, Stop the fan using a rag like in the video below, Because the engine is at normal operating temperature, the PCM will not command the fan to run right away. `han_aHS{%2hp\MJXB (o_ya;b'aT^)s,_8<9|J]ba[||T-=%9k8^q+dzn.fmUO~7t~4=FiSuY>Q0? )Qo8Ni{Im'Ur$z3-XfLdE1c=e/ n4 a#I63px&LW42C`?c+fO~ lM |}&&`z`x7tv}3l6yUoo7~0EoeYf eh80/ar;)B]T# Troubleshooting steps 1. One (of many) of my top things to do is service the Transmission. The one in this video is bad? Check the assembly for leaks through the seams and around the shaft. If necessary, use the hood strut to hold the hood up so you can work unobstructed. You are also talking to people that have been doing this for a while on this platform. Its even more annoying if you dont know what role the fan clutch plays as part of the engine cooling system in your engine! 0000002179 00000 n 0000001895 00000 n Suggestion: Normally it has nothing to do with clutch fan. The actual fan speed should be approx - 250 RPM of desired.. For your own safety, you should never attempt to manually test your fan clutch while the vehicle is running. If you end up in full lock, the thing is somehow getting a constant positive, the pcm should see that and set a light because its command and actual are different. By . Engine still runs great! If the clutch does not engage when the AC is turned on when a voltage is present is a sign that the fan is damaged. Last Updated: August 7, 2022 Possible Cause: Damaged engine fan usually caused by friction, wear or entry of foreign objects. These fans are more efficient than flex fans that are controlled by engine speed instead of temperature. It may be a good idea to check the temperature of a few different vents. If the air flow feels suspiciously hot or weak, it could just be a bad vent. Adobe d y8#870S9sA1\ As the engine speed increases, the blades of a flex fan change their angle. If your fan clutch has gone bad, replace it as soon as possible to prevent engine damage. Any input would be appreciated. The PCM never puts it to 100%, 90% is the highest and that's at very high engine temps. Has the waterpump bearing seized around the fan shaft? No CEL. 3000000/10000 Manufacturers names, logos, part numbers and descriptions are used for reference purposes only and are not intended to indicate that our fans, fan clutches or fan assemblies are made by the OEM. Viscous Fan Clutch. http://gmtnation.com/forums/threads/dtc-p1481-electric-fan-clutch-inop.12899/#post-412028, https://gmtnation.com/forums/threads/chasing-gremlins.20197/, Try to stop the fan using a rag like in the video below, Hold it for a little bit. Search by part number to find a replacement for your fan clutch. Fan Clutches for Commercial Vehicles - SACHS - ZF Friedrichshafen These fans are needed at slow speeds, typically below 35 mph and at idle. A PDF Electronically Controlled Viscous Cooling Fan NOTE: This fix will NOT help if your fan clutch is mechanically worn, or if the thermal valve is stuck closed or open.Silicone oil used in this video:http://www.rcplanet.com/Kyosho_Silicone_Oil_5000_p/kyosil5000.htm?codesf=4012476105\u0026gclid=CI2ypaPZuMkCFYI_aQodzRMD7wThe fan clutch featured in this video is from a 2002 Suzuki XL-7 V6:https://www.youtube.com/playlist?list=PLVsGvNkPZC6ovCedbyH9yHkXdoPr4nNWpThanks for watching! 0000066631 00000 n Read more! 0000001421 00000 n The fan clutch should always engage when the system head pressure reaches in the 240 to 270 lbs range. How to tell if your Viscous Fan Clutch is Bad - Sprinter Vans / Other Vehicles kansas city sprinters 38K views 1 year ago How Engine Cooling System Works | Autotechlabs Autotechlabs 6.3M. When I say it disengages, I mean it coasts to a stop! No CEL. A properly-functioning fan clutch is critical to engine reliability, as it works to maintain a safe temperature range. This is true, especially if the fault is in the engine cooling system and youre unsure the fan clutch symptoms to look for. PDF Subject: Troubleshooting Vehicles Equipped with Viscous Fan Drives They can cause a vehicle to overheat at idle and in heavy traffic. tt4*ittd830z02OL0 p Before you go looking for your fan clutch, make sure your vehicle is in park, with the engine off and the handbrake firmly engaged. Viscous drives with CSD hold oil in the reservoir while the engine is off, so the fan disengages up to 80 percent faster than standard viscous drives. If you need advice on replacing a faulty fan clutch, please get in touch. We use cookies to make wikiHow great. Benjamin Jerew is an ASE-certified Master Automobile Technician with over a decade of experience in auto repair, maintenance, and diagnosis. A bad fan clutch can cause engine problems like excessively high temperatures and poor performance. At a stop, though, because the fan clutch doesn't engage and air isn't forced through the radiator, the engine can't dissipate excess heat. 42 0 obj <> endobj Customer Question. ~HO8$/` qAXwx$XA, uHfX m@;d;Hh22Ig 7Ya Viscous drives tend to have the first two issues. When a pneumatic fan clutch fails, it's likely one of three symptoms is present: The clutch won't engage. When cruising, the vehicle moving through the air pushes air through the radiator, cooling the engine. It disengaged once at 206 degrees, another time at 217 degrees but sometimes it stays engaged. I'm open to ideas. will continue at full speed if the electrical circuit is faulty). JavaScript is disabled. Try it again but pull the fan relay. 0000069993 00000 n Check with diagnostic tool scanner - See if the readings reach the desired levels, 6. You could put +12V to the white wire, which will effectively put the fan to 100% engagement but my method will also show if it works at partial engagement. Electrical faults don't have to be wiring, they can be control module input/output related including: Mooseman, post was a long time ago and not sure this is even active! I am going to do a re test of mine, I think it is bad and I want to be sure. %PDF-1.5 % Make sure your new fan clutch is the same type as the original. B=uJqc-I]-Y;6?VGx#qL.Vb&3Lv.EA5NYH$9&V=%n" startxref Alternatively, an optical tachometer can be used to measure fan speed. The engine temp reads a little low all the time, about 2-3 notches below 210. Then test the fan clutch by giving it a good push. Tech Tip: Electric viscous fan clutches in 2003-09 5.9L Dodge Ram For more information about ASE, visit the official ASE website at www.ase.com, Copyright 2008-2023 All Rights Reserved Privacy Policy Disclaimer Sitemap. I released it and it took about 30 sec to a minute to get back up to speed and then I heard it engage and spin faster. 0000066928 00000 n I'm open to ideas. hks8>Gw3Lg^Y In addition to regulating engine temperatures with razor-sharp precision, viscous-operated fan drives can produce lower emissions, decrease noise pollution, provide fuel savings and ultimately increase performance. Fan Clutch Failure Modes and Troubleshooting | GMB Blog Also verify no indication of viscous fluid leakage. 0000002273 00000 n Tuning and Understanding your Toyota Viscous Fan Clutch On the other hand, too much heat can be a big problem, melting non-metal engine parts and rendering lubricating oil useless. The "drive disc" and the "front half" share these closely spaced rings. Most fan clutches on newer vehicles are designed with a metal spring coil that reacts to changes in temperature and engages or disengages the fan accordingly. A noisy, constant droning noise from the fan. I've been trying to read as many of these waterpump/fan post as possible. Hmmmmm.. that truck looks awfully familiar. A roaring noise could mean a number of things, including a bad wheel bearing, worn tires, or a differential that's low on oil. If your fan clutch is not operating the way it should, it's likely due to a fluid leak or a bad thermostatic spring or valve. 0000060378 00000 n If the noise from the engine is too loud, try popping the hood to prevent the sound from being muffled. Subject: Troubleshooting Vehicles Equipped with Viscous Fan Drives Qualify by assuming the vehicle to be in OEM condition. Check for closed winterfront. Get Started > Always in stock Suggestion: Clutch fan isn't the source of the issue. Next, locate the fan clutch bolted to the water pump in the engine compartment. I fixed the pictures in my thread. Give the water pump hose a quick jostle as well to see if the problem might lie there. First, see if you can detect any problems with the fan clutch while youre driving. Electronic-Viscous Fan Clutch Troubleshooting. Advantages of variable-speed fan drives that use viscous technology, LA Sanitation increases uptime and driver comfort, Solving overcooling problems for generators in cold weather, Maximizing uptime and efficiency for heavy haulers, Viscous drive boosts Canadian heavy equipment supplier's value, 1,100-truck fleet parts manager: Viscous drives 'have worked flawlessly', Optimized cooling means more power to vehicle's wheels, Decreased particulate matter release/lower CO2 emissions, Faster engine and cab warmupwithCold-Start Disengagement.