)Qo8Ni{Im'Ur$z3-XfLdE1c=e/ n4 a#I63px&LW42C`?c+fO~ lM |}&&`z`x7tv}3l6yUoo7~0EoeYf eh80/ar;)B]T# 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. The engine temp reads a little low all the time, about 2-3 notches below 210. A viscous fan clutch enables the fan to more or less freewheel . By signing up you are agreeing to receive emails according to our privacy policy. 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. Electronic-Viscous Fan Clutch Troubleshooting. Hmmmmm.. that truck looks awfully familiar. The fan won't roar. Clutch fan check - See if any visible damage on clutch fan, 3. Posted - 02/07/2008 : 5:47:26 PM. Try it again but pull the fan relay. Check All Cooling System Components Radiator, water pump, thermostat, temperature gauge, fault codes, etc. Troubleshooting steps 1. Quick tutorial on how to refill your viscous fan clutch with proper fluid and reseal the chamber. Thank you. The sensor returns a signal pulse through the cooling fan speed signal circuit. ()*6789:FGHIJVWXYZefghijtuvwxyz ? 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. DT PDF Visctronic 12 Volt 732/842/882 Fan Drives - BorgWarner g? We use cookies to make wikiHow great. 57 0 obj <>stream 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. I replaced it earlier this year while chasing an overheating condition (along with the Water Pump and Thermostat). The fan clutch won't dis engage. I just checked, and yes the speed increase and decrease with rpm. This is because the clutch will seem to be in perfect working order, as the fault is on the inside. 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. Horton VMaster Ultra (Stratis) Viscous Fan Drive Troubleshooting Guide Engine feature code 12THX GENERAL OPERATION (ALL ENGINES) Horton VMaster is a variable speed drive. This condition will cease shortly upon disengagement. It's often compared to a jet engine. While youre at it, consider the performance and fuel economy benefits of upgrading to electric cooling fans. 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. The fan fault is logged in your engine management system. When cruising, the vehicle moving through the air pushes air through the radiator, cooling the engine. -Determine if the fault is mechanical or electrical(and then follow the appropriate troubleshooting steps) . Original fan and water pump. If the noise from the engine is too loud, try popping the hood to prevent the sound from being muffled. 3000000/10000 Viscous fan drive technology Precise thermal management that does so much more than keep engines cool. I fixed the pictures in my thread. wikiHow is where trusted research and expert knowledge come together. It disengaged once at 206 degrees, another time at 217 degrees but sometimes it stays engaged. If the fan still hasnt kicked in by the time temperature reaches about 200F (93C), you can be sure that theres a problem somewhere. 77 0 obj <>stream Solenoid coil / Actuator check - Try rotating solenoid coil / actuator and see if it's stuck, 5. adobe:docid:photoshop:2ce534b1-d8a3-11d8-a54e-a63691f3af4c hb```"wVF/3 1K6l|Z+W9"qHg6Engl!z,A& qx3h9@ -Vb5$?%?@,#Xj~aXSFe40hXmW{|o\ s2WIp?k2pUiF 0 gA startxref I'm open to ideas. 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. For more information about ASE, visit the official ASE website at www.ase.com, Copyright 2008-2023 All Rights Reserved Privacy Policy Disclaimer Sitemap. . In most cases, fan blades are designed to flex up to. As the engine speed increases, the blades of a flex fan change their angle. The oil flows to and from the main chamber as engine heat fluctuates, engaging and disengaging the clutch. ELK\KHA(gYIm|eTjQ Gb$cqla7?Nf$77X!ry~1h1,amo 2jI&zI? Z;:QJ-uvgMq4Z(*n *ER"Mvz. Fan Clutch Replacement - Popular Mechanics Make sure your new fan clutch is the same type as the original. 1 We use cookies and similar web technologies to recognize your repeat website visits and preferences and to analyze traffic. How to Tell If Your Fan Clutch Is Going Bad - LiveAbout Electric cooling fan clutch. | The Truck Stop During engine start up, the EV fan clutch will engage and match engine speed for up to 3 minutes. Its even more annoying if you dont know what role the fan clutch plays as part of the engine cooling system in your engine! A failing fan clutch could leave you stranded with expensive repair bills, so pay attention to these symptoms. Seek the source of issue elsewhere, Possible Cause: The outer part or solenoid coil has signs of fluid leaking. When I say it disengages, I mean it coasts to a stop! Engine fan check - See if any damages on fan 2. Inside the fan clutch, there is a small reservoir filled with a viscous silicone-based oil. Luckily, there are a few symptoms you can look for to diagnose whether the fault is a seized fan clutch or not. You should feel some tugging from the fan trying to get it going again. A little heat is a good thing, improving fuel vaporization, performance, and fuel economy it also warms up the cabin in the winter. Too fast to try and slow it with a rag. 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. Due to their control by the engine computer, they don't experience air leaks. Clutch slipping and eventual failure are normal with time. Squeaks while doing it too. Electronic-Viscous Fan Clutch Troubleshooting During engine start up, the EV fan clutch will engage and match engine speed for up to 3 minutes. When this happens, many of the symptoms described above can be experienced. As engine temperature increases, look for a sudden jump in fan speed. Yes, the one in this video is bad. (The previous clutch had loose bearings.) GMTNation.com uses SSL to secure all traffic between our server and your browsing device. All rights reserved. Thank you! I am going to do a re test of mine, I think it is bad and I want to be sure. 0000069624 00000 n 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. I dont want to go near the fan and try and stop it. Roaring. DIY: Viscous Fan Clutch - Silicone Oil Refill Pine Hollow Auto Diagnostics 450K views 7 years ago 1995-2004 Toyota Tacoma fan clutch rebuild. Check Mechanical Integrity of Clutch With engine off, rotate fan by hand. 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. Suggestion: Clutch fan isn't the source of the issue. CV fan clutches are part of a vehicle's engine cooling system and used to cool the engine by regulating the fan speed At low or regular engine loads, the cooling airflow produced during driving is normally sufficient to dissipate heat from the radiator and work as an engine cooler. 0000049576 00000 n 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. Possible Cause: Try rotating the bottom part (solenoid coil / actuator) with hand. Viscous Fan Clutch Not Working and Troubleshoot Guide GB 447 5091 38. If necessary, use the hood strut to hold the hood up so you can work unobstructed. Install the Horton EC450 TM Fan Clutch on the engine. that did the trick. The PCM supplies a 5-volt reference and a low reference to the Hall effect sensor. My fan seems to run fast all the time but not loud like the jet engine i've read about. Found loose internal connections at the harness connector on the clutch and tightened them up a bit. y8#870S9sA1\ Viscous fan clutches are belt-driven and found on many older rear-wheel-drive passenger cars. Some fan clutches are designed with a built-in thermometer somewhere on the instrument panel. If not, it's defective. They contain a drive and driven plate with annular grooves that fill with a thick viscous silicon fluid. When it happens its especially hard to take when you need your vehicle or application to finish a job. 0000060846 00000 n If the ground breaks it's the same. Fan Clutch Symptoms of a Locked-in Fan Clutch | Viscofans