0000001551 00000 n 0000014403 00000 n One of two conditions is possible. Yes, the one in this video is bad. 0000001421 00000 n 42 36 As fan clutch specialists, weve seen plenty of faulty viscous drives in our time. Normal solenoid coil electric current should be 40mA to 60mA. I just checked, and yes the speed increase and decrease with rpm. %%EOF Troubleshooting Common Condenser Fan Problems, Signs and Symptoms of Spark Plug Problems, Reasons Why Your Car's Idle Speed Might Be Too High, Engine Ignition and Cam Timing for the Novice, Troubleshooting Engine Driveability Problems: Surging or Misfiring. A noisy, constant droning noise from the fan. Check to make sure each of the bolts holding the fan clutch in place is secure and intact. 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. 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. 57 0 obj <>stream 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. Hmmmmm.. that truck looks awfully familiar. 0000002179 00000 n I am going to do a re test of mine, I think it is bad and I want to be sure. 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. It disengaged once at 206 degrees, another time at 217 degrees but sometimes it stays engaged. OK. Suggestion: Clutch fan isn't the source of the issue. Here's a list of the most common fan clutch noises and what each one could mean: 1. [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 If your fan clutch has gone bad, replace it as soon as possible to prevent engine damage. Stopped with rag pushed in for a few minutes but couldnt see any temp rise, with air on, but its 55F here. One last thing, check the wiring, especially at the clutch connector to ensure there are no broken wires. Viscous fan drive technology Precise thermal management that does so much more than keep engines cool. So, youve noticed some, or all, of the symptoms above and think a possible culprit could be a locked-in fan clutch. HWyTSW; * 1d!y ZmK*8gA:s9hG{F;3U9Q]DMNDIBM. Then let it get hot. 0000070141 00000 n Ed Beery is an Automotive Specialist and the Owner of InTechgrity Automotive Excellence based in Denver, Colorado. I dont want to go near the fan and try and stop it. The fan clutch is responsible for controlling the operation of the cooling fans. Customer Question. I had a broken wire inside the loom when my fan thought it was a Jet fighter: I thought the way to test it was to short it so the clutch engaged? If it doesn't change, it's toast. If you still need assistance, contact our customer service team at (800) 810-9110. Clutch slipping and eventual failure are normal with time. Sometimes a customer will complain about a roaring noise coming from the engine bay. Very good info on the function of the EV Clutch however, the quick function test requires a Tech 2. 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. Viscous Fan Clutch Not Working and Troubleshoot Guide Viscous fan drives | Variable speed fan clutch So you suspect that your fan clutch is defective. All proceeds go to supporting the site. Will go feel it again. If necessary, use the hood strut to hold the hood up so you can work unobstructed. The fan clutch unit is approximately 1 foot tall by 1 foot wide. Once viscous fluid is in the working chamber, shearing of the fluid results in fan rotation. All it does is freewheel and has no resistance. Symptoms of a Bad or Failing Fan Clutch | YourMechanic Advice As a result, you may think that your fan clutch has seized. Inside the fan clutch, there is a small reservoir filled with a viscous silicone-based oil. Thanks for the quick response. May daughters use it now. Solenoid coil / Actuator check - Try rotating solenoid coil / actuator and see if it's stuck 5. Install the Horton EC450 TM Fan Clutch on the engine. The PCM supplies a 5-volt reference and a low reference to the Hall effect sensor. If you find youre experiencing any of these fan clutch symptoms make sure to get your fan clutch checked out properly by a professional technician to correctly diagnose the issue. 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. . Alternatively, an optical tachometer can be used to measure fan speed. Solenoid coil / Actuator check - Try rotating solenoid coil / actuator and see if it's stuck, 5. Wire check - See if the wire to ECU is normal 4. Never attempt to inspect or handle any of the mechanical components in the engine compartment while the engine is running. Engine belt stuck on clutch fan, causing solenoid coil/actuator unable to rotate, 1. hb```c``Jg`e`fgc@ >(GCPa J0 Quick tutorial on how to refill your viscous fan clutch with proper fluid and reseal the chamber. 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. This article has been viewed 118,630 times. When it happens its especially hard to take when you need your vehicle or application to finish a job. It disengaged once at 206 degrees, another time at 217 degrees but sometimes it stays engaged. Paying attention to your vehicle is the first step in an accurate diagnosis, effective repair, and reliable vehicle. Check it by releasing it from its seat and measuring the distance between the spring and its retainer. 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. ELK\KHA(gYIm|eTjQ Gb$cqla7?Nf$77X!ry~1h1,amo 2jI&zI? Z;:QJ-uvgMq4Z(*n *ER"Mvz. I feel like I reset something because I've never seen it go slow then engage. Coolant temperature sensor circuit problems can set a DTC. Luckily, there are a few symptoms you can look for to diagnose whether the fault is a seized fan clutch or not. I agree, a T444E will get hot easily unless cooled well, so the fan clutch is critical. 4294967295 The PCM never puts it to 100%, 90% is the highest and that's at very high engine temps. 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. Fan Clutch Symptoms of a Locked-in Fan Clutch | Viscofans Keep an eye out for any visible components that are bent, crooked, or missing. Could not find any bad wires, just looseness in the actual pins inside the connector. startxref It is possible something like a plastic bag could have got wound up where the shaft goes in to the bearing. Secondly, if your viscous fan hub is electronically controlled, check if the wire is unplugged or damaged. These fans are more efficient than flex fans that are controlled by engine speed instead of temperature. Quick tutorial on how to refill your viscous fan clutch with proper fluid and reseal the chamber. The one in this video is bad? We recommend that you check the transducer and fan clutch assembly. If you are getting that tugging, the clutch is working. 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 2004-12-07T10:24:41-05:00 A new radiator fan and thermal fan clutch, ready to keep your engine cool. It should turn smoothly with some drag. Check the assembly for leaks through the seams and around the shaft. This fluid's viscosity is measured in CST or centistokes and degrades over time. Common Fan Clutch Noises And What They Mean | GMB Blog Horton VMaster Ultra (Stratis) Viscous Fan Drive Troubleshooting Guide Engine feature code 12THX GENERAL OPERATION (ALL ENGINES) Horton VMaster is a variable speed drive. These fans are needed at slow speeds, typically below 35 mph and at idle. adobe:docid:photoshop:f99bcbb8-4863-11d9-b0f7-b8eb50f766bb Wire check - See if the wire to ECU is normal, 4. It will also set a code if the fan clutch is not running at the set RPM - too slow or too fast. How to Test a Fan Clutch | Hot Rod Forum The newest viscous drives also feature Cold-Start Disengagement, which can help trucks and agricultural tractors warm up faster during cold conditions. 1. endstream endobj startxref this will apply to T1N sprinters as well as NCV3 equipped with a. Next, locate the fan clutch bolted to the water pump in the engine compartment. DT You are also talking to people that have been doing this for a while on this platform. It may not display this or other websites correctly. 0000001016 00000 n One smart strategy is to have your vehicles fan clutch and water pump replaced together. The engine temp reads a little low all the time, about 2-3 notches below 210. 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. Some viscous properties of the fan hub may vary the res Standard thermostatic fan clutches will only be present on cars and trucks with rear-wheel drive. 0000049755 00000 n Give the water pump hose a quick jostle as well to see if the problem might lie there. image/tiff If you need advice on replacing a faulty fan clutch, please get in touch. This animation of Horton's latest variable-speed fan drive, the LCX, shows viscous cooling technology in action. Viscous fan clutch is going to be the norm when more industrial engine uses ECM/ECU. Success stories from users of variable-speed cooling solutions. The info I posted regarding a locked clutch (beyond a few minutes) is still accurate. I'm open to ideas. Honestly, that sounds like normal behavior to me. Its even more annoying if you dont know what role the fan clutch plays as part of the engine cooling system in your engine! Short of a relay sticking, I see no possible cause that it would be electrical. Fan clutch have a patented System Sentry, which goes about as an early cautioning fuse to alarm the administrator. It may be a good idea to check the temperature of a few different vents. Traces of oil are perfectly normal, and wont necessarily be an indication that your clutch is shot. >Vyzy{=sUt\z^{W{7^sU:GWEzz5x=^s^[=^s+^o=^s{O=:y{^o==r. A cooling fan clutch is expected to fail over time. The fan clutch is integral to the safe and efficient operation of your commercial vehicle or application engine. The fan clutch won't dis engage. Suggestion: Normally it has nothing to do with clutch fan. It may work at 100% but maybe not at 20-30%. They contain a drive and driven plate with annular grooves that fill with a thick viscous silicon fluid. Squeaks while doing it too. When the fan clutch engages, it spins up greatly, increasing air flow through the radiator and over the engine. 2625 When a leak occurs, it's at the bearing seal, at the center rear of. Due to their control by the engine computer, they don't experience air leaks. 0000052838 00000 n Thank you. T444E overheat problems - School Bus Fleet Magazine Forums Always check for manufacturer's specifications for any special procedures. 0000035192 00000 n Motorhomes and RVs | Engine cooling systems Get Started > Always in stock This means that the fan should power down at higher speeds because the rushing air is sufficient for cooling the engine. These fans are needed at slow speeds, typically below 35 mph and at idle. The fan won't roar. see page 3 of the GM Techlink Document I have attached. Global Parts Distributors has the electronic fan clutch assembly: part number 2911297. The fan fault is logged in your engine management system. 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. JavaScript is disabled. PDF Visctronic 12 Volt 732/842/882 Fan Drives - BorgWarner The engine temp reads a little low all the time, about 2-3 notches below 210. Identify Your Viscous Fan Clutch - Kit Masters Registered in England. will continue at full speed if the electrical circuit is faulty). Truck Repair; Viscus fan on MP8 MACK engine on all the time, happened. Check with diagnostic tool scanner - See if the readings reach the desired levels, 6. It would definitely do damage. Fan Clutch Symptoms of a Locked-in Fan Clutch. All browsing and transactions within are secured by an SSL Certificate with high-strength encryption. A small amount of resistance always keeps the fan spinning, but its basically free-wheeling until the fan clutch engages. Even when the drive is off the fan will spin between 50-300 rpm. We are working every day to make sure our community is one of the best. and A Transmission Fluid & Cooler Lines Flush, too? Read more! Perhaps the Heat Soak cannot get carried away because things may have gotten a bit "sluggish" inside of the radiating units? If the ground breaks it's the same. ()*6789:FGHIJVWXYZefghijtuvwxyz ? 1. A bit obvious, but make sure to check the engine management system on your vehicle before anything else. 77 0 obj <>stream hks8>Gw3Lg^Y For more information about how to test a fan clutch, such as other signs to look for which indicate damage, read on. 0000060378 00000 n The 2 halves opened. (The previous clutch had loose bearings.) I found this video by Scanner Danner where he's trying to diagnose a fan code. Viscous Fan Clutch. I just repaired a electro viscous clutch today on my 02 TrailBlazer. Like any other part, fan clutches can develop issues that, if left unchecked, can be both devastating and costly. NOTE: This fix will NOT help if your fan clutch is mechanically worn, or if the thermal va. 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. 2004-12-07T12:21:43-05:00
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