Viscous fan clutches are belt-driven and found on many older rear-wheel-drive passenger cars. Check with diagnostic tool scanner - See if the readings reach the desired levels, 6. Check it by releasing it from its seat and measuring the distance between the spring and its retainer. When I said DO NOT TEST, that's with the method described with the rag. 0000069649 00000 n 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. Yes, the one in this video is bad. E&OE All information displayed on this website is correct at the time of publication but is subject to change. 2021 Viscofans. Squeaks while doing it too. Throw away the ruined newspaper Rev the engine, you should notice that the fan increases speed, but not proportionally to the crank speed. A little heat is a good thing, improving fuel vaporization, performance, and fuel economy it also warms up the cabin in the winter. Also verify no indication of viscous fluid leakage. 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. Now what? Solenoid coil / Actuator testor - Test solenoid coil / Actuator if you have an actuator tester. Vehicle overheating One of the first symptoms that is commonly associated with a bad or failing fan clutch is an overheating engine. You should probably slow your role a little and do more reading. 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. Engine still runs great! 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. Due to their control by the engine computer, they don't experience air leaks. the cooling fan using a Hall effect sensor, which reads a reluctor track inside the fan clutch. PDF IK0900075 - Horton Stratis Fan Hub Diagnostics Page 1 of 13 endstream endobj 15 0 obj <>>> endobj 16 0 obj <>/Font<>/ProcSet[/PDF/Text]/Properties<>>>/Rotate 0/TrimBox[0.0 0.0 612.0 792.0]/Type/Page>> endobj 17 0 obj <>stream A locked-in, or seized, fan clutch can cause radiator fans to fully engage at all speeds. Like any other part, fan clutches can develop issues that, if left unchecked, can be both devastating and costly. Install the Horton EC450 TM Fan Clutch on the engine. You are also talking to people that have been doing this for a while on this platform. adobe:docid:photoshop:f99bcbb8-4863-11d9-b0f7-b8eb50f766bb Normally it's caused by faulty clutch fan, Possible Cause: Clutch fan wire got cut/pulled by foreign factors. Ed and the InTechgrity Automotive Excellence Team are approved by the American Automobile Association (AAA) for repairs and are Automotive Service Excellence (ASE) certified. You must log in or register to reply here. 0000053141 00000 n I went out and started up the truck and the fan was spinning FAST. 450 We had a few overheating issues at Bremer Bay Why is it overlooked? A roaring noise could mean a number of things, including a bad wheel bearing, worn tires, or a differential that's low on oil. They contain a drive and driven plate with annular grooves that fill with a thick viscous silicon fluid. Engine overheating at low speed or when stopped is the most-common fan clutch failure symptom. endstream endobj 43 0 obj <> endobj 44 0 obj <>/Font<>>>/Fields 35 0 R>> endobj 45 0 obj <>/Font<>/ProcSet[/PDF/Text/ImageC]/XObject<>>>/Rotate 0/Type/Page>> endobj 46 0 obj <>/Border[0 0 0]/H/P/Rect[54 2.64001 576 14.64]/Subtype/Link/Type/Annot>> endobj 47 0 obj <> endobj 48 0 obj <> endobj 49 0 obj <>stream So, youve noticed some, or all, of the symptoms above and think a possible culprit could be a locked-in fan clutch. We don't all go to a dealer to get work done right away. Possible Cause: Damaged engine fan usually caused by friction, wear or entry of foreign objects. Not everyone has a scanner that can command the fan clutch. NOTE: This fix will NOT help if your fan clutch is mechanically worn, or if the thermal va. Locked-in fan clutch symptoms. By using our site, you agree to our. One last thing, check the wiring, especially at the clutch connector to ensure there are no broken wires. 0000049755 00000 n 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. Benjamin Jerew is an ASE-certified Master Automobile Technician with over a decade of experience in auto repair, maintenance, and diagnosis. 14 0 obj <> endobj Here's a list of the most common fan clutch noises and what each one could mean: 1. These fans are needed at slow speeds, typically below 35 mph and at idle. When I say it disengages, I mean it coasts to a stop! [JieZ`$@v*v}F)RNf-=}#>c,kc^pv5!1iiFLTL" #XjtvFHb4uubu0.-lD_r,`e)W/H]S$G+h'uqq6`G#ogkGFr'E{G=J'{GGPvR(n % of people told us that this article helped them. Make sure your new fan clutch is the same type as the original. The fan clutch should be disengaged with no voltage applied. 42 0 obj <> endobj Thank you. So you suspect that your fan clutch is defective. 0000001016 00000 n Thank u LB. endstream endobj startxref You do realize that you are posting things that don't work for the everyday person trying to figure out his problem. 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 Thanks to all authors for creating a page that has been read 118,630 times. A properly-functioning fan clutch is critical to engine reliability, as it works to maintain a safe temperature range. If the fan clutch is going bad or has failed, there are a couple of ways you may notice. 1 Inside the fan clutch, there is a small reservoir filled with a viscous silicone-based oil. It is possible something like a plastic bag could have got wound up where the shaft goes in to the bearing. The "drive disc" and the "front half" share these closely spaced rings. Shows the signals to and from the the fan and how the fan operates when commanded by the PCM and the scanner. Wire check - See if the wire to ECU is normal 4. If loosened, the P-clamp must be re-tightened to prevent the wiring harness from slipping through the P-clamp, causing tension on the Fan Clutch wiring. Simply follow the steps below and you rill receive a replacement part number. Now somethimes it only gets to halfway to 210, even in the summer. I just want to add another thing to check before declaring the clutch dead. AC little warm. Stopped with rag pushed in for a few minutes but couldnt see any temp rise, with air on, but its 55F here. Subject: Troubleshooting Vehicles Equipped with Viscous Fan Drives Qualify by assuming the vehicle to be in OEM condition. Check the assembly for leaks through the seams and around the shaft. Fan Clutches for Commercial Vehicles - SACHS - ZF Friedrichshafen Anyone seen a case where the EV Fan Clutch DISENGAGES completely? 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! 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. Clutch fan check - See if any visible damage on clutch fan, 3. Before you go looking for your fan clutch, make sure your vehicle is in park, with the engine off and the handbrake firmly engaged. 0000060846 00000 n image/tiff May daughters use it now. hb```"wVF/3 1K6l|Z+W9"qHg6Engl!z,A& qx3h9@ -Vb5$?%?@,#Xj~aXSFe40hXmW{|o\ s2WIp?k2pUiF 0 gA 0000001421 00000 n 0000025483 00000 n Fan Clutch Replacement - Popular Mechanics The engine cooling fan, made of plastic or metal, isnt hard-connected to the fan pulley or water pump, but instead is soft-connected via the fan clutch. X 0000070141 00000 n Fan Clutch Symptoms of a Locked-in Fan Clutch. 0000001342 00000 n On the other hand, too much heat can be a big problem, melting non-metal engine parts and rendering lubricating oil useless. No one enjoys a vehicle or application breaking down: No one. HWyTSW; * 1d!y ZmK*8gA:s9hG{F;3U9Q]DMNDIBM. Keep holding it while the engine gets hotter, As it gets hotter, you should start feeling some tugging from the fan trying to get it going. Okay, so in your other post to me about testing it you say that the one in this video is bad. T444E overheat problems - School Bus Fleet Magazine Forums Seek the source of issue elsewhere, Possible Cause: The outer part or solenoid coil has signs of fluid leaking. I just repaired a electro viscous clutch today on my 02 TrailBlazer. We use cookies and similar web technologies to recognize your repeat website visits and preferences and to analyze traffic. A noisy, constant droning noise from the fan. There are 7 references cited in this article, which can be found at the bottom of the page. 0000060995 00000 n By . 0 xref Initially I get a Trans Flush at Hello, everyone. %%EOF 0000066928 00000 n Clutch fan check - See if any visible damage on clutch fan 3. How to test a fan clutch - YouTube One (of many) of my top things to do is service the Transmission. Anyone seen a case where the EV Fan Clutch DISENGAGES completely? 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. A viscous fan clutch contains a thick fluid that can leak from the unit. hb```c``Jg`e`fgc@ >(GCPa J0 Registered in England. Sometimes a customer will complain about a roaring noise coming from the engine bay. It's often compared to a jet engine. 2 1. %PDF-1.4 % (The previous clutch had loose bearings.) I dont want to go near the fan and try and stop it. Like all viscous fan clutches it may be turning, but is it working correctly? If necessary, use the hood strut to hold the hood up so you can work unobstructed. You should feel some tugging from the fan trying to get it going again. The fan clutch unit is approximately 1 foot tall by 1 foot wide. gave the two in question a little twist with a fine nosed pliers. &\cUj When a leak occurs, it's at the bearing seal, at the center rear of. How to Test a Fan Clutch | Hot Rod Forum A viscous fan clutch enables the fan to more or less freewheel . . The fan clutch is integral to the safe and efficient operation of your commercial vehicle or application engine. 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. When I say it disengages, I mean it coasts to a stop! Has the waterpump bearing seized around the fan shaft? Any input would be appreciated. EC450TM Fan Clutch NOTE Do not loosen the P-clamp attaching the wiring harness to the metal tab on the Fan Clutch. We are working every day to make sure our community is one of the best. -Determine if the fault is mechanical or electrical(and then follow the appropriate troubleshooting steps) . As you could imagine, trying to stop a locked fan with a rag would not be a pleasant experience. Fan clutch have a patented System Sentry, which goes about as an early cautioning fuse to alarm the administrator. Most truck fan clutches will fail-safe in this instance (i.e. Perhaps the Heat Soak cannot get carried away because things may have gotten a bit "sluggish" inside of the radiating units? 0000049576 00000 n 0000052838 00000 n Inspecting the Fan Clutch Manually Download Article 1 Pop the hood. Include your email address to get a message when this question is answered. 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. hks8>Gw3Lg^Y The "drive disc" spins freely in the housing except for the silicon fluid. I feel like I reset something because I've never seen it go slow then engage. I just checked, and yes the speed increase and decrease with rpm. For more information about ASE, visit the official ASE website at www.ase.com, Copyright 2008-2023 All Rights Reserved Privacy Policy Disclaimer Sitemap. Hold your hand a few inches away from the vent so slight variations in temperature will be more noticeable. Firstly, check to make sure something hasnt gotten caught or wrapped up around the back of the viscous fan clutch. Never attempt to inspect or handle any of the mechanical components in the engine compartment while the engine is running. I am going to do a re test of mine, I think it is bad and I want to be sure. 0000000016 00000 n this is a brief video to show a simple diagnostic test to see if you have a fan clutch that has failed to produce torque. 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. Develop the tech skills you need for work and life. A bad fan clutch can cause engine problems like excessively high temperatures and poor performance. Engine fan check - See if any damages on fan, 2. They also have a thermostatic spring. Set the These issues will draw the PCM's attention, and it will turn on the check engine light to warn you about them. LEARN MORE >>, Cold-Start Disengagement helps engines warm up faster in the cold. will continue at full speed if the electrical circuit is faulty). 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 it spins more than three full rotations, this indicates that it may be prone to slipping. 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 Fan Clutch Failure Modes and Troubleshooting | GMB Blog If you have difficulty rotating or it's just stuck, then it could be either foreign object or clutch fan. 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. Wire check - See if the wire to ECU is normal, 4. The valve is activated by a pulse width modulation (PWM) output signal from the powertrain control module (PCM). 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. The fan clutch should always engage when the system head pressure reaches in the 240 to 270 lbs range. The fan won't roar. ~HO8$/` qAXwx$XA, uHfX m@;d;Hh22Ig 7Ya 4294967295 Resurrecting this old thread. 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. Even if I pull the relay or unplug the fan it still runs fast. 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. It will cost somewhere between $150-300 to have a new fan clutch installed, on average. Technical Services (UK) Ltd trading as Viscofans. Check to make sure each of the bolts holding the fan clutch in place is secure and intact. 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. 0000002273 00000 n Warning: This post may contain misspelling, grammatical errors, disorganized sentence structure. While youre at it, consider the performance and fuel economy benefits of upgrading to electric cooling fans. Short of a relay sticking, I see no possible cause that it would be electrical. This is considered normal and may last more than 3 minutes in cooler climates or at lower driving speeds resulting in fan roar. this will apply to T1N sprinters as well as NCV3 equipped with a. 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. 0000036305 00000 n Get Started > Always in stock Equally frustrating is diagnosing the fault. 0000002090 00000 n Viscous fan clutches are belt-driven and found on many older rear-wheel-drive passenger cars. Solenoid coil / Actuator check - Try rotating solenoid coil / actuator and see if it's stuck, 5. I'm open to ideas. Check for closed winterfront. Suggestion: Normally it has nothing to do with clutch fan. Check All Cooling System Components Radiator, water pump, thermostat, temperature gauge, fault codes, etc. Thank you! 0000070596 00000 n . 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. As a result, you may think that your fan clutch has seized. 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. For your own safety, you should never attempt to manually test your fan clutch while the vehicle is running. When the engine starts to get too hot, the fan clutch takes the air flowing through the radiator, cools it down, and feeds it into the engine to cool it. The fan clutch is responsible for controlling the operation of the cooling fans. 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. 3000000/10000 The fan needs to operate within the limits at each test point.The fan should engage and remain engaged during the entire engagement request. )Qo8Ni{Im'Ur$z3-XfLdE1c=e/ n4 a#I63px&LW42C`?c+fO~ lM |}&&`z`x7tv}3l6yUoo7~0EoeYf eh80/ar;)B]T# Clutch slipping and eventual failure are normal with time. The fluid wears, rendering it incapable of grabbing the drive and driven plates and offer the gripping resistance needed to hold them together. 0 This article was co-authored by Ed Beery. I agree, a T444E will get hot easily unless cooled well, so the fan clutch is critical. The one in this video is bad? Fan clutch ticking | Ford Explorer - Ford Ranger Forums - Serious Then test the fan clutch by giving it a good push. The wires run in a rubber hose in front of the fan. GB 447 5091 38. By landing on this page, were guessing you know exactly what one does: This is what a fan clutch does, if youre unsure. 0000066631 00000 n Overheating constantly, in trafc and on long pulls Check the coolant level. It may not display this or other websites correctly. and A Transmission Fluid & Cooler Lines Flush, too? Also when I first press the gas pedal it seems like the engine wants to stall which is probably something totally different? If your unit has one, keep an eye on the temperature so youll know about when the fan speed should begin ramping up. Fan clutch engaged on cold startup on 4.6 V8? | Ford Explorer - Ford As fan clutch specialists, weve seen plenty of faulty viscous drives in our time. %PDF-1.5 % 0000035283 00000 n VAT No. 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. No CEL. You can also perform this test while the vehicle is parked and in neutral gear. 0000014403 00000 n The engine temp reads a little low all the time, about 2-3 notches below 210. All Tsab 36K views 4 years ago How to know if. JavaScript is disabled. The engine temp reads a little low all the time, about 2-3 notches below 210. I replaced it earlier this year while chasing an overheating condition (along with the Water Pump and Thermostat). Customer Question. Suggestion: See if there's any foreign object stuck on clutch fan, if any foreign objects absent, then it is likely the clutch fan. GMTNation.com uses SSL to secure all traffic between our server and your browsing device. You are using an out of date browser. If the clutch is constantly engaged, the vehicle will suffer from poor gas mileage and loss of horsepower. When this happens, many of the symptoms described above can be experienced. 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. 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. that did the trick. startxref It may be a good idea to check the temperature of a few different vents. 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. I've been trying to read as many of these waterpump/fan post as possible. From the exterior, a locked-in fan clutch will be hard to diagnose with just a visual check. The sensor returns a signal pulse through the cooling fan speed signal circuit. Too fast to try and slow it with a rag. endstream endobj 45 0 obj 216635 endobj 46 0 obj<>stream References. Tech Tip: Electric viscous fan clutches in 2003-09 5.9L Dodge Ram Common Fan Clutch Noises And What They Mean | GMB Blog Truck Repair; Viscus fan on MP8 MACK engine on all the time, happened. This weekend I was going to do a Coolant Flush on the TB for the first time cause IMO the fluid is not looking that great. Motorhomes and RVs | Engine cooling systems We use cookies to make wikiHow great. Hmmmmm.. that truck looks awfully familiar. The fan clutch won't dis engage. - GENERAL GEORGE S. PATTON. <<59055635F8F5FE459E851E498E113946>]/Prev 686576>> Symptoms of a Bad or Failing Fan Clutch | YourMechanic Advice Viscous fan drives | Variable speed fan clutch 77 0 obj <>stream Viscofans is in no way affiliated to any of the brands shown on this site. Possible Cause: Try rotating the bottom part (solenoid coil / actuator) with hand. 0000001551 00000 n Identify Your Viscous Fan Clutch - Kit Masters Contact Whatsapp: +6012 879 3220 if you need any product! Resurrecting this old thread. Identify Your Viscous Fan Clutch. A small amount of resistance always keeps the fan spinning, but its basically free-wheeling until the fan clutch engages. How to Tell If Your Fan Clutch Is Going Bad - LiveAbout Coolant temperature sensor circuit problems can set a DTC. Adobe Photoshop CS Windows This means that the fan should power down at higher speeds because the rushing air is sufficient for cooling the engine. No CEL. Standard thermostatic fan clutches will only be present on cars and trucks with rear-wheel drive. DIY: Viscous Fan Clutch - Silicone Oil Refill - YouTube My fan seems to run fast all the time but not loud like the jet engine i've read about. It was a junkyard unit off an 03 Envoy. Fan Clutch A/C Problems. | Cummins Diesel Forum This includes heavy- and medium-duty trucks, agricultural tractors, vocational and specialty vehicles. Some fan clutches are designed with a built-in thermometer somewhere on the instrument panel.

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