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What would cause belts to squeal when heater fan is turned on?
On Thu, 12 Mar 2020 23:49:30 -0400, Steve W. wrote:
> Also, are you sure it's the belt? A bad bearing in the blower motor > could cause a squeal. Just to add an experienced +1 to that comment above... o I've had intermittent squeals that lasted for months that were bearings; o I've had intermittent squeals that lasted for months that were belts. I tried the stethescope diagnostic method, which many people suggest, but an engine is so loud that, personally, I find that method worthless. I also tried the spritzer of water on the belts method that many people suggest, but, again, I found that method almost worthless in my tests. I never was any good at pressing on the belt to test the tension (and I don't trust those tension gauges any more than my finger), where tension isn't everything anyway (although visual inspection is pretty good). In the case of the bearing squeal, it finally manifested itself in the $5 alternator bearings having been the culprit, where the rebuilding took me a weekend as breaking open an alternator isn't as easy as you might think. <https://www.alibaba.com/showroom/alternator-bearings.html> In the case of the belts, the alternator belt eventually broke, necessitating a parking-lot replacement of the broken belt. <https://www.alibaba.com/showroom/gates-alternator-belt.html> -- Together we can learn far more than anyone of us can by learning alone. |
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