DT 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. % of people told us that this article helped them. Adobe d 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. Luckily, there are a few symptoms you can look for to diagnose whether the fault is a seized fan clutch or not. I replaced it earlier this year while chasing an overheating condition (along with the Water Pump and Thermostat). Listen out for a gentle roar from the fan clutch when youre driving at least 50 miles per hour, as this can indicate that its binding or locking up. A new radiator fan and thermal fan clutch, ready to keep your engine cool. Found loose internal connections at the harness connector on the clutch and tightened them up a bit. 0000049755 00000 n Now what? A viscous fan clutch enables the fan to more or less freewheel . Develop the tech skills you need for work and life. LEARN MORE >>. The actual fan speed should be approx - 250 RPM of desired.. When I say it disengages, I mean it coasts to a stop! The fan clutch unit is approximately 1 foot tall by 1 foot wide. I replaced it earlier this year while chasing an overheating condition (along with the Water Pump and Thermostat). Wanted to get some input/feed backI have always done basic maintenance after purchasing a used vehicle regardless of what or anything that I know from the previous owner that's been serviced. So, youve noticed some, or all, of the symptoms above and think a possible culprit could be a locked-in fan clutch. For more information about how to test a fan clutch, such as other signs to look for which indicate damage, read on. 0000002273 00000 n Thanks for the quick response. My fan seems to run fast all the time but not loud like the jet engine i've read about. Honestly, that sounds like normal behavior to me. For your own safety, you should never attempt to manually test your fan clutch while the vehicle is running. Ideally, the fan shouldnt spin more than 1-1 times. 0000052661 00000 n If an open or shorted condition has developed in the electronically controlled viscous fan clutch circuit, a Diagnostic Trouble Code (DTC) can be set. Identify Your Viscous Fan Clutch If you are unable to find a part number on your viscous fan clutch, our easy-to-use fan clutch identification system will walk you through the process of measuring it to determine the proper replacement. Resurrecting this old thread. They can cause a vehicle to overheat at idle and in heavy traffic. By signing up you are agreeing to receive emails according to our privacy policy. We don't all go to a dealer to get work done right away. `han_aHS{%2hp\MJXB (o_ya;b'aT^)s,_8<9|J]ba[||T-=%9k8^q+dzn.fmUO~7t~4=FiSuY>Q0? 2625 We recommend that you check the transducer and fan clutch assembly. image/tiff Vehicle overheating One of the first symptoms that is commonly associated with a bad or failing fan clutch is an overheating engine. Like all viscous fan clutches it may be turning, but is it working correctly? Secondly, if your viscous fan hub is electronically controlled, check if the wire is unplugged or damaged. >Vyzy{=sUt\z^{W{7^sU:GWEzz5x=^s^[=^s+^o=^s{O=:y{^o==r. This includes heavy- and medium-duty trucks, agricultural tractors, vocational and specialty vehicles. Even when the drive is off the fan will spin between 50-300 rpm. The wires run in a rubber hose in front of the fan. Check Mechanical Integrity of Clutch With engine off, rotate fan by hand. The fluid wears, rendering it incapable of grabbing the drive and driven plates and offer the gripping resistance needed to hold them together. Has the waterpump bearing seized around the fan shaft? Then test the fan clutch by giving it a good push. Engine fan consume the largest portion of the energy supply from the engine, up to 10%. If it spins more than three full rotations, this indicates that it may be prone to slipping. Fan clutch have a patented System Sentry, which goes about as an early cautioning fuse to alarm the administrator. When a leak occurs, it's at the bearing seal, at the center rear of. 1. 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. Check the assembly for leaks through the seams and around the shaft. 0000036305 00000 n Standard thermostatic fan clutches will only be present on cars and trucks with rear-wheel drive. 0000060428 00000 n 0000060995 00000 n Were kidding of course. ELK\KHA(gYIm|eTjQ Gb$cqla7?Nf$77X!ry~1h1,amo 2jI&zI? Z;:QJ-uvgMq4Z(*n *ER"Mvz. VAT No. Check the gauge for proper operation (especially electric gauges). Thank you! Its important to maintain the fan clutch in your vehicle, as its responsible for testing the temperature of the air coming through the radiator and preventing the engine from overheating. All Tsab 36K views 4 years ago How to know if. Engine fan check - See if any damages on fan 2. The fan fault is logged in your engine management system. When it happens its especially hard to take when you need your vehicle or application to finish a job. GMTNation.com uses SSL to secure all traffic between our server and your browsing device. 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. There are 7 references cited in this article, which can be found at the bottom of the page. 0000035283 00000 n I'm open to ideas. There are three types of fan clutch, depending on the vehicles design. If it feels the same, then I would assume the clutch is done. It was a junkyard unit off an 03 Envoy. [KpB0G8/F7Xl u@qLTAUzpT0F,)xb7J+%*u)EkZ2mJikWc[B, %%EOF Some viscous properties of the fan hub may vary the res Now somethimes it only gets to halfway to 210, even in the summer. For more information about how to test a fan clutch, such as other signs to look for which indicate damage, read on. Always check for manufacturer's specifications for any special procedures. All browsing and transactions within are secured by an SSL Certificate with high-strength encryption. that did the trick. 2004-12-07T12:21:43-05:00 I only found it while trying to force it to overheat. Warning: This post may contain misspelling, grammatical errors, disorganized sentence structure. If fan speed is not detected a DTC will be set. A cooling fan clutch is expected to fail over time. 1 0 obj<>/Metadata 259 0 R>> endobj 2 0 obj<> endobj 3 0 obj<> endobj 5 0 obj null endobj 8 0 obj<>/Font<>/XObject<>/ProcSet[/PDF/Text/ImageC]/ExtGState<>/Properties<>/MC1<>>>>>>> endobj 11 0 obj<> endobj 18 0 obj<> endobj 44 0 obj<>stream It should turn smoothly with some drag. If the fan still hasnt kicked in by the time temperature reaches about 200F (93C), you can be sure that theres a problem somewhere. Viscous fan clutch is going to be the norm when more industrial engine uses ECM/ECU. Thank u LB. 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. 0000060846 00000 n 1AQ"aq2 #BR3$bC4% Resurrecting this old thread. LEARN MORE >>, Cold-Start Disengagement helps engines warm up faster in the cold. The one in this video is bad? 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. Keep an eye out for any visible components that are bent, crooked, or missing. Check All Cooling System Components Radiator, water pump, thermostat, temperature gauge, fault codes, etc. Suggestion: Clutch fan isn't the source of the issue. JavaScript is disabled. One smart strategy is to have your vehicles fan clutch and water pump replaced together. Horton VMaster Ultra (Stratis) Viscous Fan Drive Troubleshooting Guide Engine feature code 12THX GENERAL OPERATION (ALL ENGINES) Horton VMaster is a variable speed drive. see page 3 of the GM Techlink Document I have attached. For more information about ASE, visit the official ASE website at www.ase.com, Copyright 2008-2023 All Rights Reserved Privacy Policy Disclaimer Sitemap. Front-wheel drive vehicles are equipped with a completely different cooling system due to the way the engine is configured. 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. It may be a good idea to check the temperature of a few different vents. This is true, especially if the fault is in the engine cooling system and youre unsure the fan clutch symptoms to look for. . 4294967295 g? Fan Clutch. While youre at it, consider the performance and fuel economy benefits of upgrading to electric cooling fans. Mack truck 2014 cxu613 mp8 .i replaced clutch fan controlled by air solenoid but now fan kick in 180 f till drops temp 150f on hill at high load.scr derating sign shows into dash but there is . 0000069624 00000 n When cruising, the vehicle moving through the air pushes air through the radiator, cooling the engine. hb```c``Jg`e`fgc@ >(GCPa J0 DIY: Viscous Fan Clutch - Silicone Oil Refill Pine Hollow Auto Diagnostics 450K views 7 years ago 1995-2004 Toyota Tacoma fan clutch rebuild. Not everyone has a scanner that can command the fan clutch. 3000000/10000 It disengaged once at 206 degrees, another time at 217 degrees but sometimes it stays engaged. From the exterior, a locked-in fan clutch will be hard to diagnose with just a visual check. 14 0 obj <> endobj Make sure your new fan clutch is the same type as the original. Solenoid coil / Actuator check - Try rotating solenoid coil / actuator and see if it's stuck 5. If the air flow feels suspiciously hot or weak, it could just be a bad vent. This article was co-authored by Ed Beery. HWyTSW; * 1d!y ZmK*8gA:s9hG{F;3U9Q]DMNDIBM. 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. If necessary, use the hood strut to hold the hood up so you can work unobstructed. Also when I first press the gas pedal it seems like the engine wants to stall which is probably something totally different? Search by part number to find a replacement for your fan clutch. OK. Get Started > Always in stock 0000002179 00000 n Posted - 02/07/2008 : 5:47:26 PM. When I say it disengages, I mean it coasts to a stop! Im pretty sure that is why this method is posted. "By perseverance, study, and eternal desire, any man can become great." Possible Cause: Damaged engine fan usually caused by friction, wear or entry of foreign objects. 0000000016 00000 n Paying attention to your vehicle is the first step in an accurate diagnosis, effective repair, and reliable vehicle. When a fan clutch seizes, the engine is put at considerable risk from overheating, or over-cooling, and the damage done can be catastrophic if left alone. Also verify no indication of viscous fluid leakage. Our community has been around for many years and pride ourselves on offering unbiased, critical discussion among people of all different backgrounds. Inside the fan clutch, there is a small reservoir filled with a viscous silicone-based oil. 0000001551 00000 n Nearly unheard of on modern cars with electric engine cooling fans, people sometimes still refer to the accessory drive belts as fan belts. This term harkens to the day when cars and trucks used drive belts to drive the cooling fan or water pump. 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. startxref Anyone seen a case where the EV Fan Clutch DISENGAGES completely? It may work at 100% but maybe not at 20-30%. The fluid flows from a reservoir to the plate area at higher engine temperatures and returns to let the fan spin more freely as the engine cools. 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. this will apply to T1N sprinters as well as NCV3 equipped with a. You can also perform this test while the vehicle is parked and in neutral gear. This fluid's viscosity is measured in CST or centistokes and degrades over time. All rights reserved. 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. Then let it get hot. Skip to content Visit Us Diesel Components Inc. 670 E. Travelers Trail #105 Burnsville, MN 55337 Send an Email sales@dieselcomponentsinc.com Call us (800) 252-6625| (952) 890-2885 Buy Parts SERVICES The newest viscous drives also feature Cold-Start Disengagement, which can help trucks and agricultural tractors warm up faster during cold conditions. Has the waterpump bearing seized around the fan shaft? Here, you can see where the fan and fan clutch are driven by the engine. You can do this by making a note of unusual noise or temperatures while driving, inspecting the housing for oil leakage or physical damage, measuring the amount of resistance offered by the fan blades. As you could imagine, trying to stop a locked fan with a rag would not be a pleasant experience. Stopped with rag pushed in for a few minutes but couldnt see any temp rise, with air on, but its 55F here. A bum fan clutch drains horsepower from the engine to keep the mechanical fans running, which can ultimately lead to critical overheating, decreased fuel economy, and poor general performance. 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. There is a very easy way to test the fan clutch for staying fully engaged all the time. If the ground breaks it's the same. The fan needs to operate within the limits at each test point.The fan should engage and remain engaged during the entire engagement request. They also have a thermostatic spring. AC little warm. No one enjoys a vehicle or application breaking down: No one. adobe:docid:photoshop:2ce534b1-d8a3-11d8-a54e-a63691f3af4c wikiHow is where trusted research and expert knowledge come together. The 2 halves opened. Hope you don't mind me referencing your video? Install the Horton EC450 TM Fan Clutch on the engine. 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. 42 0 obj <> endobj If you have difficulty rotating or it's just stuck, then it could be either foreign object or clutch fan. I keep using it as an example on how to test the fan so thought it would be prefect for this article. Usually a bad or failing fan clutch will produce a few symptoms that can alert the driver of a potential issue. Identify Your Viscous Fan Clutch. I dont want to go near the fan and try and stop it. Check it by releasing it from its seat and measuring the distance between the spring and its retainer. 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! These elements are natural in the process of Writing in a foreign language. In our 97-98 AmTran REs, the 444s run 210* all the time, sometimes a little less in the winter, in the summer, the fans are almost constant on, and if it's hot enough (85-90* outside) they'll hit 230* under load. You must log in or register to reply here. A properly-functioning fan clutch is critical to engine reliability, as it works to maintain a safe temperature range. I took a rag and dragged it against the outer part of the fan and was able to slow it with some firm pressure and eventually stopped it. Please note, comments must be approved before they are published, Solenoid coil / Actuator unable to rotate, When the engine is in low temperature or in capacity, the clutch is separated, fan speed rotates at low speed, When the engine is at high capacity and the water temperature rises, the clutch coupled and rotate together, the fan rotates at high speed, When water temperate reach designated low temperature, the clutch reverts back to separated state, The ECU will detect temperature via water temp sensor and operate accordingly. This condition will cease shortly upon disengagement. %%EOF Customer Question. Here's a list of the most common fan clutch noises and what each one could mean: 1. Throw away the ruined newspaper Rev the engine, you should notice that the fan increases speed, but not proportionally to the crank speed. I am going to do a re test of mine, I think it is bad and I want to be sure. The sensor returns a signal pulse through the cooling fan speed signal circuit. Include your email address to get a message when this question is answered. Now somethimes it only gets to halfway to 210, even in the summer. Next, locate the fan clutch bolted to the water pump in the engine compartment. Even if I pull the relay or unplug the fan it still runs fast. Quick tutorial on how to refill your viscous fan clutch with proper fluid and reseal the chamber. By clicking Accept All Cookies, you agree to the storing of cookies on your device to enhance site navigation, analyze site usage, and assist in our marketing efforts. trailer If not, it's defective. Electronic-Viscous Fan Clutch Troubleshooting. . It will regulate engine temperatures more efficiently compared to older direct fuel injection engine models. Viscofans is in no way affiliated to any of the brands shown on this site. 0000060915 00000 n It disengaged once at 206 degrees, another time at 217 degrees but sometimes it stays engaged. Viscous fan drive technology Precise thermal management that does so much more than keep engines cool. This should lock the clutch and pull air like a dump truck. It is these rings, and the silicon fluid in the gaps between them that couple the system together.The inner ring is taller than the others. Contact Whatsapp: +6012 879 3220 if you need any product! When a pneumatic fan clutch fails, it's likely one of three symptoms is present: The clutch won't engage. Original fan and water pump. This is considered normal and may last more than 3 minutes in cooler climates or at lower driving speeds resulting in fan roar. 0000035192 00000 n 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. This animation of Horton's latest variable-speed fan drive, the LCX, shows viscous cooling technology in action. These fans are needed at slow speeds, typically below 35 mph and at idle. But in the late 1950s, viscous fan clutches began to appear. We use cookies and similar web technologies to recognize your repeat website visits and preferences and to analyze traffic. Anyone seen a case where the EV Fan Clutch DISENGAGES completely? One last thing, check the wiring, especially at the clutch connector to ensure there are no broken wires. 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). Troubleshooting steps 1. It was a junkyard unit off an 03 Envoy. The fan clutch experts at Kit Masters can help you identify your fan so that you can determine the correct replacement. The "drive disc" and the "front half" share these closely spaced rings. Okay, so in your other post to me about testing it you say that the one in this video is bad. 77 0 obj <>stream The info I posted regarding a locked clutch (beyond a few minutes) is still accurate. The "drive disc" spins freely in the housing except for the silicon fluid. 0000001421 00000 n (The previous clutch had loose bearings.) Benjamin Jerew is an ASE-certified Master Automobile Technician with over a decade of experience in auto repair, maintenance, and diagnosis. Possible Cause: Try rotating the bottom part (solenoid coil / actuator) with hand. The Coolant in the Reservoir is nice and Orange like it should be but the Coolant in the Radiator is a Green-ish/Brown-ish color. Yes, the one in this video is bad. This means that the fan should power down at higher speeds because the rushing air is sufficient for cooling the engine. Viscous drives tend to have the first two issues. If your unit has one, keep an eye on the temperature so youll know about when the fan speed should begin ramping up. The issue actually turned out to be a minor blown head gasket, with coolant slowly being shifted into the overflow bottle at high RPM and not being sucked back in, but the engine was able to get warmer because the viscous fan clutch wasn't working properly. Your vehicles fan clutch is an often overlooked but important little partits responsible for gauging the temperature of the air passing through the radiator and keeping the engine from overheating.
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