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Jeep Wrangler YJ
YJ General Discussion
Fan Clutch And Cooling Issues
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<blockquote data-quote="Gilaguy23" data-source="post: 430104" data-attributes="member: 19498"><p>I'll throw out another thought here. yes, it sounds like your clutch is working correctly but for $40 or so its worth the piece of mind down the road. Far as noise goes IIRC once moving about 30 mph or so the fan does little to nothing as the speed of the air does the job. At low speeds the clutch kicks in and dependent on HDuty or even who made it the fan spins at X percent of full lock up. I'll say on my 91 I never hear the fan, but testing like you have done shows it fine and it never overheats.That being said After looking back on your "new to me" jeep thread and the pics of the radiator I thought looked a bit plugged up internally even after the flushes. Looks can be deceiving and you cant see down into the center of the core. I recall you going thru the hassles with thermostat replacements and low temps. Like Macho and the guys indicated they need the 195 thermo to run correctly and go into closed loop ops. My 91 runs typically at 210ish or just past the 12 position when under load. Idling it runs about 1/8" under that mark 195ish Id guess. Just to double check your work make sure the coolant is a 50/50 mix. Ive heard of guys running 100% coolant thinking more is better, thats not the case. Ive also seen personally where a water pump impeller corroded away to the point of doing little to nothing. Cant recall if you replaced yours but if all else fails thats a possibility.</p></blockquote><p></p>
[QUOTE="Gilaguy23, post: 430104, member: 19498"] I'll throw out another thought here. yes, it sounds like your clutch is working correctly but for $40 or so its worth the piece of mind down the road. Far as noise goes IIRC once moving about 30 mph or so the fan does little to nothing as the speed of the air does the job. At low speeds the clutch kicks in and dependent on HDuty or even who made it the fan spins at X percent of full lock up. I'll say on my 91 I never hear the fan, but testing like you have done shows it fine and it never overheats.That being said After looking back on your "new to me" jeep thread and the pics of the radiator I thought looked a bit plugged up internally even after the flushes. Looks can be deceiving and you cant see down into the center of the core. I recall you going thru the hassles with thermostat replacements and low temps. Like Macho and the guys indicated they need the 195 thermo to run correctly and go into closed loop ops. My 91 runs typically at 210ish or just past the 12 position when under load. Idling it runs about 1/8" under that mark 195ish Id guess. Just to double check your work make sure the coolant is a 50/50 mix. Ive heard of guys running 100% coolant thinking more is better, thats not the case. Ive also seen personally where a water pump impeller corroded away to the point of doing little to nothing. Cant recall if you replaced yours but if all else fails thats a possibility. [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
Fan Clutch And Cooling Issues
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