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\n<\/p><\/div>"}, How to Fit a Clutch Plate: Everything Home Mechanics Need to Know, How to Choose The Right Torque Converter: Stall Speed, Brand and Size Guide. This is true, especially if the fault is in the engine cooling system and youre unsure the fan clutch symptoms to look for. GB 447 5091 38. 1 0 obj<>/Metadata 259 0 R>> endobj 2 0 obj<> endobj 3 0 obj<> endobj 5 0 obj null endobj 8 0 obj<>/Font<>/XObject<>/ProcSet[/PDF/Text/ImageC]/ExtGState<>/Properties<>/MC1<>>>>>>> endobj 11 0 obj<> endobj 18 0 obj<> endobj 44 0 obj<>stream Most fan clutches on newer vehicles are designed with a metal spring coil that reacts to changes in temperature and engages or disengages the fan accordingly. This fluid's viscosity is measured in CST or centistokes and degrades over time. %PDF-1.4 % Viscous Fan Clutch. Install the Horton EC450 TM Fan Clutch on the engine. g? The fan clutch should be disengaged with no voltage applied. 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. Squeaks while doing it too. will continue at full speed if the electrical circuit is faulty). The one in this video is bad? Vehicle overheating One of the first symptoms that is commonly associated with a bad or failing fan clutch is an overheating engine. Now somethimes it only gets to halfway to 210, even in the summer. Both parts tend to wear out at about the same time, so if one is giving you trouble, the other may not be far behind. 3000000/10000 0000057354 00000 n How to Tell If Your Fan Clutch Is Going Bad - LiveAbout Appreciate the help. Set the A failing fan clutch could leave you stranded with expensive repair bills, so pay attention to these symptoms. Resurrecting this old thread. Thank u LB. First, see if you can detect any problems with the fan clutch while youre driving. As a result, you may think that your fan clutch has seized. 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. 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. There are 7 references cited in this article, which can be found at the bottom of the page. Check it by releasing it from its seat and measuring the distance between the spring and its retainer. 0000035192 00000 n 0000066631 00000 n Right when it stop it tried to "tick" forward as I was holding it. GMTNation.com uses SSL to secure all traffic between our server and your browsing device. From the exterior, a locked-in fan clutch will be hard to diagnose with just a visual check. How Does a Viscous Fan Clutch Work? - YouTube The valve is activated by a pulse width modulation (PWM) output signal from the powertrain control module (PCM). Last Updated: August 7, 2022 If the fan clutch is going bad or has failed, there are a couple of ways you may notice. By landing on this page, were guessing you know exactly what one does: This is what a fan clutch does, if youre unsure. A small amount of resistance always keeps the fan spinning, but its basically free-wheeling until the fan clutch engages. 0000002273 00000 n AC little warm. Equally frustrating is diagnosing the fault. Squeaks while doing it too. 0000001895 00000 n I just repaired a electro viscous clutch today on my 02 TrailBlazer. 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 roaring noise could mean a number of things, including a bad wheel bearing, worn tires, or a differential that's low on oil. PDF IK0900075 - Horton Stratis Fan Hub Diagnostics Page 1 of 6 6% These elements are natural in the process of Writing in a foreign language. Short of a relay sticking, I see no possible cause that it would be electrical. It may not display this or other websites correctly. This condition will cease shortly upon disengagement. 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. How to Test a Fan Clutch: 11 Steps (with Pictures) - wikiHow The PCM never puts it to 100%, 90% is the highest and that's at very high engine temps. Ed Beery is an Automotive Specialist and the Owner of InTechgrity Automotive Excellence based in Denver, Colorado. hks8>Gw3Lg^Y 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). Inspecting the Fan Clutch Manually Download Article 1 Pop the hood. Viscous fan drives | Variable speed fan clutch Viscous fan clutches are belt-driven and found on many older rear-wheel-drive passenger cars. Wire check - See if the wire to ECU is normal, 4. The fan clutch won't dis engage. These issues will draw the PCM's attention, and it will turn on the check engine light to warn you about them. If you still need assistance, contact our customer service team at (800) 810-9110.