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77 0 obj <>stream E&OE All information displayed on this website is correct at the time of publication but is subject to change. 2021 Viscofans. It was a junkyard unit off an 03 Envoy. Seek the source of issue elsewhere, Possible Cause: The outer part or solenoid coil has signs of fluid leaking. 0000001342 00000 n 0000057354 00000 n This should lock the clutch and pull air like a dump truck. Benjamin Jerew is an ASE-certified Master Automobile Technician with over a decade of experience in auto repair, maintenance, and diagnosis. An overheating engine could literally weld itself into scrap metal. Give the water pump hose a quick jostle as well to see if the problem might lie there. Try it again but pull the fan relay. A viscous fan clutch contains a thick fluid that can leak from the unit. Stopped with rag pushed in for a few minutes but couldnt see any temp rise, with air on, but its 55F here. 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. Now somethimes it only gets to halfway to 210, even in the summer. Possible Cause: Try rotating the bottom part (solenoid coil / actuator) with hand. When cruising, the vehicle moving through the air pushes air through the radiator, cooling the engine. I just repaired a electro viscous clutch today on my 02 TrailBlazer. 1988467. I only found it while trying to force it to overheat. see page 3 of the GM Techlink Document I have attached. 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. How to test the electro-viscous fan clutch | GMTNation %PDF-1.4 % Fan Clutch Symptoms of a Locked-in Fan Clutch | Viscofans 0000002179 00000 n I fixed the pictures in my thread. 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. This article has been viewed 118,630 times. 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. Then test the fan clutch by giving it a good push. They also have a thermostatic spring. Engine fan consume the largest portion of the energy supply from the engine, up to 10%. The fan clutch should always engage when the system head pressure reaches in the 240 to 270 lbs range. 0000070141 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. 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. 0000060846 00000 n Make sure your new fan clutch is the same type as the original. 0000066928 00000 n 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. It may be a good idea to check the temperature of a few different vents. Perhaps the Heat Soak cannot get carried away because things may have gotten a bit "sluggish" inside of the radiating units? 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. LEARN MORE >>, Cold-Start Disengagement helps engines warm up faster in the cold. Fan Clutches for Commercial Vehicles - SACHS - ZF Friedrichshafen 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. -Determine if the fault is mechanical or electrical(and then follow the appropriate troubleshooting steps) . Viscous fan clutch is going to be the norm when more industrial engine uses ECM/ECU. You are using an out of date browser. Install the Horton EC450 TM Fan Clutch on the engine. This animation of Horton's latest variable-speed fan drive, the LCX, shows viscous cooling technology in action. Ed and the InTechgrity Automotive Excellence Team are approved by the American Automobile Association (AAA) for repairs and are Automotive Service Excellence (ASE) certified. Last Updated: August 7, 2022 Check the assembly for leaks through the seams and around the shaft. endstream endobj startxref Will go feel it again. Before you go looking for your fan clutch, make sure your vehicle is in park, with the engine off and the handbrake firmly engaged. 57 0 obj <>stream 4294967295 If you need advice on replacing a faulty fan clutch, please get in touch. A slipping fan clutch can result in failed cooling, increased engine strain, and poor fuel efficiency, which is why its important to evaluate the condition your vehicles fan clutch if you suspect it might be wearing out. It does not function like an on/off drive. %PDF-1.5 % Quick tutorial on how to refill your viscous fan clutch with proper fluid and reseal the chamber. Resurrecting this old thread. http://gmtnation.com/forums/threads/dtc-p1481-electric-fan-clutch-inop.12899/#post-412028, https://gmtnation.com/forums/threads/chasing-gremlins.20197/, Try to stop the fan using a rag like in the video below, Hold it for a little bit. Thanks for the quick response. Too fast to try and slow it with a rag. %%EOF How to Tell If Your Fan Clutch Is Going Bad - LiveAbout Squeaks while doing it too. Customer Question. For more information about how to test a fan clutch, such as other signs to look for which indicate damage, read on. Tuning and Understanding your Toyota Viscous Fan Clutch Hmmmmm.. that truck looks awfully familiar. A small amount of resistance always keeps the fan spinning, but its basically free-wheeling until the fan clutch engages. By . So you suspect that your fan clutch is defective. Viscous drives tend to have the first two issues. We use cookies and similar web technologies to recognize your repeat website visits and preferences and to analyze traffic. 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 If the air flow feels suspiciously hot or weak, it could just be a bad vent. 6.7 cooling fan problem | Ford Powerstroke Diesel Forum Most truck fan clutches will fail-safe in this instance (i.e. First, see if you can detect any problems with the fan clutch while youre driving. With more than eight years of experience, he specializes in providing maintenance and repair services for both individuals and companies. . We recommend that you check the transducer and fan clutch assembly. How Does a Viscous Fan Clutch Work? - YouTube o! If the noise from the engine is too loud, try popping the hood to prevent the sound from being muffled. 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 . Front-wheel drive vehicles are equipped with a completely different cooling system due to the way the engine is configured. As the engine speed increases, the blades of a flex fan change their angle. All it does is freewheel and has no resistance. I feel like I reset something because I've never seen it go slow then engage. A viscous fan clutch enables the fan to more or less freewheel . Simply follow the steps below and you rill receive a replacement part number. 0000001551 00000 n There are 7 references cited in this article, which can be found at the bottom of the page. Its even more annoying if you dont know what role the fan clutch plays as part of the engine cooling system in your engine! If you have difficulty rotating or it's just stuck, then it could be either foreign object or clutch fan. Check Mechanical Integrity of Clutch With engine off, rotate fan by hand. A new radiator fan and thermal fan clutch, ready to keep your engine cool. It should turn smoothly with some drag. If the fan clutch is going bad or has failed, there are a couple of ways you may notice. wikiHow is where trusted research and expert knowledge come together. All Tsab 36K views 4 years ago How to know if. Clutch fan check - See if any visible damage on clutch fan 3. %PDF-1.4 % The info I posted regarding a locked clutch (beyond a few minutes) is still accurate. A cooling fan clutch is expected to fail over time. 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. I've been trying to read as many of these waterpump/fan post as possible. Clutch fan check - See if any visible damage on clutch fan, 3. 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. The sensor returns a signal pulse through the cooling fan speed signal circuit. They contain a drive and driven plate with annular grooves that fill with a thick viscous silicon fluid. Electronic-Viscous Fan Clutch Troubleshooting During engine start up, the EV fan clutch will engage and match engine speed for up to 3 minutes. 0000002090 00000 n All proceeds go to supporting the site. It will also set a code if the fan clutch is not running at the set RPM - too slow or too fast. g? Very good info on the function of the EV Clutch however, the quick function test requires a Tech 2. As a result, you may think that your fan clutch has seized. Fan Clutch Symptoms of a Locked-in Fan Clutch. Set the During engine start up, the EV fan clutch will engage and match engine speed for up to 3 minutes. Horton Fan Clutch - Troubleshooting - Diesel Components, Inc Contact Whatsapp: +6012 879 3220 if you need any product! 3000000/10000 I agree, a T444E will get hot easily unless cooled well, so the fan clutch is critical. Hold your hand a few inches away from the vent so slight variations in temperature will be more noticeable. 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. It will regulate engine temperatures more efficiently compared to older direct fuel injection engine models. Now somethimes it only gets to halfway to 210, even in the summer. Ideally, the fan shouldnt spin more than 1-1 times. The pwm feed is positive so if that breaks it defaults to unlocked. this will apply to T1N sprinters as well as NCV3 equipped with a. When a leak occurs, it's at the bearing seal, at the center rear of. - GENERAL GEORGE S. PATTON. rS&cD5Ts6'E7FdU()8GHVe*9:IJWXYZftugvwhijxyz i !1AQa"q2#BR 3br$Csc%4S5&DTdEU' This is considered normal and may last more than 3 minutes in cooler climates or at lower driving speeds resulting in fan roar. But in the late 1950s, viscous fan clutches began to appear. I just want to add another thing to check before declaring the clutch dead. Inspecting the Fan Clutch Manually Download Article 1 Pop the hood. Clutch slipping and eventual failure are normal with time. The 2 halves opened. '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. On the other hand, too much heat can be a big problem, melting non-metal engine parts and rendering lubricating oil useless. Time for a Radiator-Heater Core Flush? Equally frustrating is diagnosing the fault. 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. How to Test a Fan Clutch | Hot Rod Forum 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. Solenoid coil / Actuator check - Try rotating solenoid coil / actuator and see if it's stuck, 5. Fan Clutch. If it doesn't change, it's toast. These elements are natural in the process of Writing in a foreign language. If it feels rough or does not turn then replace the drive. (The previous clutch had loose bearings.) 0000052661 00000 n 0000049755 00000 n You should feel some tugging from the fan trying to get it going again. 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. Electronic-Viscous Fan Clutch Troubleshooting. Paying attention to your vehicle is the first step in an accurate diagnosis, effective repair, and reliable vehicle. Check for closed winterfront. A properly-functioning fan clutch is critical to engine reliability, as it works to maintain a safe temperature range. Possible Cause: Damaged engine fan usually caused by friction, wear or entry of foreign objects. A noisy, constant droning noise from the fan. Read more!