viscous fan clutch troubleshooting

. Viscous drives tend to have the first two issues. Has the waterpump bearing seized around the fan shaft? Unit 6 Scandinavia CourtChain Bar RoadCleckheatonBD19 3QW UK. I have a 2003 EXT 4WD Trailblazer 235,000 miles. They contain a drive and driven plate with annular grooves that fill with a thick viscous silicon fluid. 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. By using our site, you agree to our. Here, you can see where the fan and fan clutch are driven by the engine. Check the gauge for proper operation (especially electric gauges). hb```"wVF/3 1K6l|Z+W9"qHg6Engl!z,A& qx3h9@ -Vb5$?%?@,#Xj~aXSFe40hXmW{|o\ s2WIp?k2pUiF 0 gA Subject: Troubleshooting Vehicles Equipped with Viscous Fan Drives Qualify by assuming the vehicle to be in OEM condition. 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. Benjamin Jerew is an ASE-certified Master Automobile Technician with over a decade of experience in auto repair, maintenance, and diagnosis. A cooling fan clutch is expected to fail over time. So, youve noticed some, or all, of the symptoms above and think a possible culprit could be a locked-in fan clutch. %%EOF 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. and A Transmission Fluid & Cooler Lines Flush, too? 0000069649 00000 n 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. Warning: This post may contain misspelling, grammatical errors, disorganized sentence structure. This fluid's viscosity is measured in CST or centistokes and degrades over time. You are also talking to people that have been doing this for a while on this platform. 0000035283 00000 n One of two conditions is possible. 0000000016 00000 n Clutch fan check - See if any visible damage on clutch fan, 3. When it happens its especially hard to take when you need your vehicle or application to finish a job. Anyone seen a case where the EV Fan Clutch DISENGAGES completely? Firstly, check to make sure something hasnt gotten caught or wrapped up around the back of the viscous fan clutch. Our community has been around for many years and pride ourselves on offering unbiased, critical discussion among people of all different backgrounds. All rights reserved. If it doesn't change, it's toast. The newest viscous drives also feature Cold-Start Disengagement, which can help trucks and agricultural tractors warm up faster during cold conditions. Throw away the ruined newspaper Rev the engine, you should notice that the fan increases speed, but not proportionally to the crank speed. These fans are needed at slow speeds, typically below 35 mph and at idle. It is possible something like a plastic bag could have got wound up where the shaft goes in to the bearing. The fan clutch is responsible for controlling the operation of the cooling fans. . 0000070596 00000 n 0000052661 00000 n You should probably slow your role a little and do more reading. Contact Whatsapp: +6012 879 3220 if you need any product! As you could imagine, trying to stop a locked fan with a rag would not be a pleasant experience. How to test the electro-viscous fan clutch | GMTNation Resurrecting this old thread. 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. We are working every day to make sure our community is one of the best. y8#870S9sA1\ Seek the source of issue elsewhere, Possible Cause: The outer part or solenoid coil has signs of fluid leaking. 4294967295 It should turn smoothly with some drag. Some viscous properties of the fan hub may vary the res Hope you don't mind me referencing your video? Front-wheel drive vehicles are equipped with a completely different cooling system due to the way the engine is configured. Make sure your new fan clutch is the same type as the original. ELK\KHA(gYIm|eTjQ Gb$cqla7?Nf$77X!ry~1h1,amo 2jI&zI? Z;:QJ-uvgMq4Z(*n *ER"Mvz. this is a brief video to show a simple diagnostic test to see if you have a fan clutch that has failed to produce torque. I agree, a T444E will get hot easily unless cooled well, so the fan clutch is critical. They contain a drive and driven plate with annular grooves that fill with a thick viscous silicon fluid. PDF Electronically Controlled Viscous Cooling Fan Customer Question. NOTE: This fix will NOT help if your fan clutch is mechanically worn, or if the thermal valve is stuck closed or open.Silicone oil used in this video:http://www.rcplanet.com/Kyosho_Silicone_Oil_5000_p/kyosil5000.htm?codesf=4012476105\u0026gclid=CI2ypaPZuMkCFYI_aQodzRMD7wThe fan clutch featured in this video is from a 2002 Suzuki XL-7 V6:https://www.youtube.com/playlist?list=PLVsGvNkPZC6ovCedbyH9yHkXdoPr4nNWpThanks for watching! ~HO8$/` qAXwx$XA, uHfX m@;d;Hh22Ig 7Ya I replaced it earlier this year while chasing an overheating condition (along with the Water Pump and Thermostat). Also verify no indication of viscous fluid leakage. 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. Viscous Fan Clutch Not Working and Troubleshoot Guide Registered in England. Motorhomes and RVs | Engine cooling systems LEARN MORE >>, Cold-Start Disengagement helps engines warm up faster in the cold. Tuning and Understanding your Toyota Viscous Fan Clutch 1988467. No CEL. adobe:docid:photoshop:f99bcbb8-4863-11d9-b0f7-b8eb50f766bb If you have difficulty rotating or it's just stuck, then it could be either foreign object or clutch fan. It does not function like an on/off drive. Too fast to try and slow it with a rag. During engine start up, the EV fan clutch will engage and match engine speed for up to 3 minutes. Always check for manufacturer's specifications for any special procedures. Viscous Fan Clutch Operation Symptoms - FreeASEStudyGuides.com When I say it disengages, I mean it coasts to a stop! Include your email address to get a message when this question is answered. This fluid's flow is regulated by a bi-metallic spring that opens and closes a control valve. hks8>Gw3Lg^Y uuid:2ce534b2-d8a3-11d8-a54e-a63691f3af4c VAT No. You should feel some tugging from the fan trying to get it going again. These fans are more efficient than flex fans that are controlled by engine speed instead of temperature. hb```c``Jg`e`fgc@ >(GCPa J0 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 It may not display this or other websites correctly. Could not find any bad wires, just looseness in the actual pins inside the connector. Adobe Photoshop CS Windows Im pretty sure that is why this method is posted. Viscous Fan Clutch. If not, it's defective. Global Parts Distributors has the electronic fan clutch assembly: part number 2911297. 0000002179 00000 n Possible Cause: Damaged engine fan usually caused by friction, wear or entry of foreign objects. We use cookies to make wikiHow great. The engine temp reads a little low all the time, about 2-3 notches below 210. Squeaks while doing it too. 2004-12-07T12:21:43-05:00 0000049755 00000 n 0000060428 00000 n There is an air leak in the fan drive. No CEL. Truck Repair; Viscus fan on MP8 MACK engine on all the time, happened. A locked-in, or seized, fan clutch can cause radiator fans to fully engage at all speeds. PDF IK0900075 - Horton Stratis Fan Hub Diagnostics Page 1 of 13 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 . This should lock the clutch and pull air like a dump truck. [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 Yes, the one in this video is bad. 0000066928 00000 n 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. Horton VMaster Ultra (Stratis) Viscous Fan Drive Troubleshooting Guide Engine feature code 12THX GENERAL OPERATION (ALL ENGINES) Horton VMaster is a variable speed drive. Suggestion: Clutch fan isn't the source of the issue. I just repaired a electro viscous clutch today on my 02 TrailBlazer. 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. 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. The valve is activated by a pulse width modulation (PWM) output signal from the powertrain control module (PCM). If you need advice on replacing a faulty fan clutch, please get in touch. Check the assembly for leaks through the seams and around the shaft. For a better experience, please enable JavaScript in your browser before proceeding. Viscofans is in no way affiliated to any of the brands shown on this site. 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. see page 3 of the GM Techlink Document I have attached. The fan fault is logged in your engine management system. If your fan clutch has gone bad, replace it as soon as possible to prevent engine damage. Shows the signals to and from the the fan and how the fan operates when commanded by the PCM and the scanner. If necessary, use the hood strut to hold the hood up so you can work unobstructed. Viscous fan clutches are belt-driven and found on many older rear-wheel-drive passenger cars. 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. Then test the fan clutch by giving it a good push. PDF Subject: Troubleshooting Vehicles Equipped with Viscous Fan Drives 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. Swap the fan relay with another similar one in the fuse box (headlight IIRC) and see if the problem persists. Original fan and water pump. Keep your engine temperature below 210F (99C) while youre running your tests to prevent it from overheating. The actual fan speed should be approx - 250 RPM of desired.. Locked-in fan clutch symptoms. My fan seems to run fast all the time but not loud like the jet engine i've read about. A noisy, constant droning noise from the fan. Were kidding of course. This article has been viewed 118,630 times. With more than eight years of experience, he specializes in providing maintenance and repair services for both individuals and companies. I keep using it as an example on how to test the fan so thought it would be prefect for this article. 1. 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. DIY: Viscous Fan Clutch - Silicone Oil Refill - YouTube All Tsab 36K views 4 years ago How to know if. Short of a relay sticking, I see no possible cause that it would be electrical. Time for a Radiator-Heater Core Flush? Thank u LB. It will also set a code if the fan clutch is not running at the set RPM - too slow or too fast. NOTE: This fix will NOT help if your fan clutch is mechanically worn, or if the thermal va. rS&cD5Ts6'E7FdU()8GHVe*9:IJWXYZftugvwhijxyz i !1AQa"q2#BR 3br$Csc%4S5&DTdEU' 2625 I just repaired a electro viscous clutch today on my 02 TrailBlazer. Horton Fan Clutch - Troubleshooting - Diesel Components, Inc Its even more annoying if you dont know what role the fan clutch plays as part of the engine cooling system in your engine! 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. All browsing and transactions within are secured by an SSL Certificate with high-strength encryption. A failing fan clutch could leave you stranded with expensive repair bills, so pay attention to these symptoms. 77 0 obj <>stream First, see if you can detect any problems with the fan clutch while youre driving. If the fan still hasnt kicked in by the time temperature reaches about 200F (93C), you can be sure that theres a problem somewhere. We had a few overheating issues at Bremer Bay Why is it overlooked? '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. %PDF-1.4 % trailer that did the trick. Viscous fan drives | Variable speed fan clutch One smart strategy is to have your vehicles fan clutch and water pump replaced together. I think its doing what u r saying, just hard to tell how hard it should be trying to pull out of hand. The PCM supplies a 5-volt reference and a low reference to the Hall effect sensor. Solenoid coil / Actuator check - Try rotating solenoid coil / actuator and see if it's stuck, 5. 57 0 obj <>stream 0000060378 00000 n I found this video by Scanner Danner where he's trying to diagnose a fan code. Also when I first press the gas pedal it seems like the engine wants to stall which is probably something totally different? Perhaps the Heat Soak cannot get carried away because things may have gotten a bit "sluggish" inside of the radiating units? Viscous fan drive technology Precise thermal management that does so much more than keep engines cool. Now somethimes it only gets to halfway to 210, even in the summer. Posted - 02/07/2008 : 5:47:26 PM. The wires run in a rubber hose in front of the fan. By . Due to their control by the engine computer, they don't experience air leaks. I went out and started up the truck and the fan was spinning FAST. It relies on temp sensor to detect temperature and send signals through ECM/ECU and switches the clutch fan to different levels accordingly. 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. 0000060846 00000 n Ed and the InTechgrity Automotive Excellence Team are approved by the American Automobile Association (AAA) for repairs and are Automotive Service Excellence (ASE) certified. A new radiator fan and thermal fan clutch, ready to keep your engine cool. Squeaks while doing it too. %PDF-1.5 % 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. If the fan clutch is going bad or has failed, there are a couple of ways you may notice. OK. Quick tutorial on how to refill your viscous fan clutch with proper fluid and reseal the chamber. Virtually any on- or off-highway engine can benefit from viscous cooling technology. For more information about how to test a fan clutch, such as other signs to look for which indicate damage, read on. Fan clutch have a patented System Sentry, which goes about as an early cautioning fuse to alarm the administrator. 42 36 1. 0000036305 00000 n Develop the tech skills you need for work and life. gave the two in question a little twist with a fine nosed pliers. 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). 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. Symptoms of a Bad or Failing Fan Clutch | YourMechanic Advice If you still need assistance, contact our customer service team at (800) 810-9110. The fan won't roar. It was a junkyard unit off an 03 Envoy. How to Tell If Your Fan Clutch Is Going Bad - LiveAbout Overheating constantly, in trafc and on long pulls Check the coolant level. An overheating engine could literally weld itself into scrap metal. It may work at 100% but maybe not at 20-30%. Any input would be appreciated. One (of many) of my top things to do is service the Transmission. 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. 39 0 obj <>/Filter/FlateDecode/ID[<343069EB290844C787926BF2F1BCCBDD>]/Index[14 44]/Info 13 0 R/Length 111/Prev 69591/Root 15 0 R/Size 58/Type/XRef/W[1 2 1]>>stream AC little warm. 0000008513 00000 n >Vyzy{=sUt\z^{W{7^sU:GWEzz5x=^s^[=^s+^o=^s{O=:y{^o==r. hbbd``b`:$@. The fan clutch should be disengaged with no voltage applied. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/4\/42\/Test-a-Fan-Clutch-Step-1.jpg\/v4-460px-Test-a-Fan-Clutch-Step-1.jpg","bigUrl":"\/images\/thumb\/4\/42\/Test-a-Fan-Clutch-Step-1.jpg\/aid9382520-v4-728px-Test-a-Fan-Clutch-Step-1.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"