adobe:docid:photoshop:f99bcbb8-4863-11d9-b0f7-b8eb50f766bb You can also perform this test while the vehicle is parked and in neutral gear. It disengaged once at 206 degrees, another time at 217 degrees but sometimes it stays engaged. For more information about how to test a fan clutch, such as other signs to look for which indicate damage, read on. 77 0 obj <>stream Throw away the ruined newspaper Rev the engine, you should notice that the fan increases speed, but not proportionally to the crank speed. 0000049576 00000 n 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. Not everyone has a scanner that can command the fan clutch. These issues will draw the PCM's attention, and it will turn on the check engine light to warn you about them. Its even more annoying if you dont know what role the fan clutch plays as part of the engine cooling system in your engine! By clicking I Accept on this banner you consent to the use of cookies unless you disable them. You are using an out of date browser. Perhaps the Heat Soak cannot get carried away because things may have gotten a bit "sluggish" inside of the radiating units? ~HO8$/` qAXwx$XA, uHfX m@;d;Hh22Ig 7Ya Thanks for the quick response. 0000035283 00000 n This means that the fan should power down at higher speeds because the rushing air is sufficient for cooling the engine. hb```c``Jg`e`fgc@ >(GCPa J0 You do realize that you are posting things that don't work for the everyday person trying to figure out his problem. 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. This is because the clutch will seem to be in perfect working order, as the fault is on the inside. By landing on this page, were guessing you know exactly what one does: This is what a fan clutch does, if youre unsure. The valve is activated by a pulse width modulation (PWM) output signal from the powertrain control module (PCM). Subject: Troubleshooting Vehicles Equipped with Viscous Fan Drives Qualify by assuming the vehicle to be in OEM condition. 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. It may work at 100% but maybe not at 20-30%. Clutch slipping and eventual failure are normal with time. During engine start up, the EV fan clutch will engage and match engine speed for up to 3 minutes. this will apply to T1N sprinters as well as NCV3 equipped with a. http://www.popularmechanics.com/cars/how-to/a302/1772922/, http://www.offroaders.com/tech/fan-clutch.htm, https://itstillruns.com/test-fan-clutch-5086903.html, https://www.2carpros.com/articles/how-a-clutch-fan-works, http://www.aa1car.com/library/cooling_fan_clutch.htm, https://club.autodoc.co.uk/magazin/how-to-check-the-engine-cooling-fan, https://www.2carpros.com/articles/fan-clutch-removal. Engine fan check - See if any damages on fan, 2. Always check for manufacturer's specifications for any special procedures. Most clutches will fade with time as spring-type clutches lose thermal sensitivity and fluid-filled clutches lose fluid viscosity. Now somethimes it only gets to halfway to 210, even in the summer. I am going to do a re test of mine, I think it is bad and I want to be sure. Some viscous properties of the fan hub may vary the res Hmmmmm.. that truck looks awfully familiar. Check the gauge for proper operation (especially electric gauges). 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. . 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. 42 36 Thank u LB. Here, you can see where the fan and fan clutch are driven by the engine. A roaring noise could mean a number of things, including a bad wheel bearing, worn tires, or a differential that's low on oil. 0000060846 00000 n The one in this video is bad? When this happens, many of the symptoms described above can be experienced. We use cookies and similar web technologies to recognize your repeat website visits and preferences and to analyze traffic. Secondly, if your viscous fan hub is electronically controlled, check if the wire is unplugged or damaged. 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. 3000000/10000 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 Inspecting the Fan Clutch Manually Download Article 1 Pop the hood. 0000000016 00000 n 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. 0000030485 00000 n Engine fan check - See if any damages on fan 2. The fan clutch should always engage when the system head pressure reaches in the 240 to 270 lbs range. If it doesn't change, it's toast. Posted - 02/07/2008 : 5:47:26 PM. 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. 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. Electronic-Viscous Fan Clutch Troubleshooting. A bad fan clutch can cause engine problems like excessively high temperatures and poor performance. %PDF-1.5 % Troubleshooting steps 1. Roaring. Check the assembly for leaks through the seams and around the shaft. xref wikiHow is where trusted research and expert knowledge come together. The newest viscous drives also feature Cold-Start Disengagement, which can help trucks and agricultural tractors warm up faster during cold conditions. . Wire check - See if the wire to ECU is normal, 4. 0000037348 00000 n 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. All rights reserved. They can cause a vehicle to overheat at idle and in heavy traffic. We are working every day to make sure our community is one of the best. I feel like I reset something because I've never seen it go slow then engage. 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. 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! While youre at it, consider the performance and fuel economy benefits of upgrading to electric cooling fans. I just joined today and been digging into whether I should replace EV on 2004 Buick Rainier 5.3. 4294967295 For more information about how to test a fan clutch, such as other signs to look for which indicate damage, read on. Front-wheel drive vehicles are equipped with a completely different cooling system due to the way the engine is configured. 0000060428 00000 n that did the trick. X It relies on temp sensor to detect temperature and send signals through ECM/ECU and switches the clutch fan to different levels accordingly. From the exterior, a locked-in fan clutch will be hard to diagnose with just a visual check. Luckily, there are a few symptoms you can look for to diagnose whether the fault is a seized fan clutch or not. 0000001342 00000 n Has the waterpump bearing seized around the fan shaft? One (of many) of my top things to do is service the Transmission. Original fan and water pump. We had a few overheating issues at Bremer Bay Why is it overlooked? 1AQ"aq2 #BR3$bC4% My issue was the fan would only engage intermittently using the Tech 2 and commanding full engagement. I've been trying to read as many of these waterpump/fan post as possible. They also have a thermostatic spring. Company No. As fan clutch specialists, weve seen plenty of faulty viscous drives in our time. Once stopped I can hold with light pressure of single finger or thumbpad, and after revving at 2k RPM same result to stop and hold. They contain a drive and driven plate with annular grooves that fill with a thick viscous silicon fluid. So you suspect that your fan clutch is defective. By signing up you are agreeing to receive emails according to our privacy policy. Try it again but pull the fan relay. I replaced it earlier this year while chasing an overheating condition (along with the Water Pump and Thermostat). It disengaged once at 206 degrees, another time at 217 degrees but sometimes it stays engaged. Some fan clutches are designed with a built-in thermometer somewhere on the instrument panel. Viscofans is in no way affiliated to any of the brands shown on this site. . Viscous fan clutches are belt-driven and found on many older rear-wheel-drive passenger cars. 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. Seek the source of issue elsewhere, Possible Cause: The outer part or solenoid coil has signs of fluid leaking. Were kidding of course. It will cost somewhere between $150-300 to have a new fan clutch installed, on average. 0000069649 00000 n Ideally, the fan shouldnt spin more than 1-1 times. All Tsab 36K views 4 years ago How to know if. Like all viscous fan clutches it may be turning, but is it working correctly? 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. Horton VMaster Ultra (Stratis) Viscous Fan Drive Troubleshooting Guide Engine feature code 12THX GENERAL OPERATION (ALL ENGINES) Horton VMaster is a variable speed drive. Vehicle overheating One of the first symptoms that is commonly associated with a bad or failing fan clutch is an overheating engine. 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. 2004-12-07T12:21:43-05:00 Right when it stop it tried to "tick" forward as I was holding it. will continue at full speed if the electrical circuit is faulty). Suggestion: Clutch fan isn't the source of the issue. - GENERAL GEORGE S. PATTON. 3000000/10000 The fan clutch is integral to the safe and efficient operation of your commercial vehicle or application engine. One last thing, check the wiring, especially at the clutch connector to ensure there are no broken wires. 42 0 obj <> endobj "By perseverance, study, and eternal desire, any man can become great." Could not find any bad wires, just looseness in the actual pins inside the connector. No CEL. 0000025483 00000 n If you need advice on replacing a faulty fan clutch, please get in touch. 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 I have a 2003 EXT 4WD Trailblazer 235,000 miles. 0000021244 00000 n 0000001551 00000 n This includes heavy- and medium-duty trucks, agricultural tractors, vocational and specialty vehicles. 2004-12-07T10:24:41-05:00 -Determine if the fault is mechanical or electrical(and then follow the appropriate troubleshooting steps) . It was a junkyard unit off an 03 Envoy. There is a very easy way to test the fan clutch for staying fully engaged all the time. Include your email address to get a message when this question is answered. When a leak occurs, it's at the bearing seal, at the center rear of. Keep your engine temperature below 210F (99C) while youre running your tests to prevent it from overheating. If you are getting that tugging, the clutch is working. Fan clutch have a patented System Sentry, which goes about as an early cautioning fuse to alarm the administrator. Unit 6 Scandinavia CourtChain Bar RoadCleckheatonBD19 3QW UK. Then let it get hot. 0000008513 00000 n DT Stopped with rag pushed in for a few minutes but couldnt see any temp rise, with air on, but its 55F here. Install the Horton EC450 TM Fan Clutch on the engine. 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. Now what? May daughters use it now. 57 0 obj <>stream Like any other part, fan clutches can develop issues that, if left unchecked, can be both devastating and costly. A viscous fan clutch contains a thick fluid that can leak from the unit. Before you go looking for your fan clutch, make sure your vehicle is in park, with the engine off and the handbrake firmly engaged. o! A cooling fan clutch is expected to fail over time. E&OE All information displayed on this website is correct at the time of publication but is subject to change. 2021 Viscofans. endstream endobj 45 0 obj 216635 endobj 46 0 obj<>stream 1. If it feels the same, then I would assume the clutch is done. Resurrecting this old thread. If your fan clutch has gone bad, replace it as soon as possible to prevent engine damage. Yes, the one in this video is bad. The info I posted regarding a locked clutch (beyond a few minutes) is still accurate. Success stories from users of variable-speed cooling solutions. Traces of oil are perfectly normal, and wont necessarily be an indication that your clutch is shot. Possible Cause: Damaged engine fan usually caused by friction, wear or entry of foreign objects. There are 7 references cited in this article, which can be found at the bottom of the page. The fan needs to operate within the limits at each test point.The fan should engage and remain engaged during the entire engagement request. Engine belt stuck on clutch fan, causing solenoid coil/actuator unable to rotate, 1. If it feels rough or does not turn then replace the drive. My fan seems to run fast all the time but not loud like the jet engine i've read about. <<59055635F8F5FE459E851E498E113946>]/Prev 686576>> An overheating engine could literally weld itself into scrap metal. It will regulate engine temperatures more efficiently compared to older direct fuel injection engine models. Check All Cooling System Components Radiator, water pump, thermostat, temperature gauge, fault codes, etc. A viscous fan clutch enables the fan to more or less freewheel . '06 Trailblazer LS, '14 Silverado LT Z71, and '17 Jeep Renegade Trailhawk, "Chance Favors The Prepared Mind" Dr. Louis Pasteur, You can't have my fish, but if you ask nicely, I'll help you catch your own. The engine temp reads a little low all the time, about 2-3 notches below 210. When it happens its especially hard to take when you need your vehicle or application to finish a job. These fans are needed at slow speeds, typically below 35 mph and at idle. 1. Due to their control by the engine computer, they don't experience air leaks. Okay, so in your other post to me about testing it you say that the one in this video is bad. With more than eight years of experience, he specializes in providing maintenance and repair services for both individuals and companies. 0000002273 00000 n the cooling fan using a Hall effect sensor, which reads a reluctor track inside the fan clutch. The "drive disc" spins freely in the housing except for the silicon fluid. % of people told us that this article helped them. A locked-in, or seized, fan clutch can cause radiator fans to fully engage at all speeds. The wires run in a rubber hose in front of the fan. Read more! These elements are natural in the process of Writing in a foreign language. 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. rS&cD5Ts6'E7FdU()8GHVe*9:IJWXYZftugvwhijxyz i !1AQa"q2#BR 3br$Csc%4S5&DTdEU' 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. If the fan clutch is going bad or has failed, there are a couple of ways you may notice. Its possible to upgrade from a non-thermal clutch to a more efficient thermal model, but not the other way around. 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. The sensor returns a signal pulse through the cooling fan speed signal circuit. 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 Global Parts Distributors has the electronic fan clutch assembly: part number 2911297.
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