<VV> Fan belt tension

[Frank DuVal]

Interesting. The Car Talk guys say that belt squealing goes away after 
the belt gets warm because the belt gets tighter. I always wondered if 
that was true, as most things get larger when warmer. Maybe they were 
thinking larger cross section= tighter belt. Maybe they weren't thinking!

Frank DuVal

On 4/11/2012 8:17 PM, jvhroberts at aol.com wrote:
>   The belt expands thermally about 10x that of any of the metals the engine is made of. It'll get looser as it gets warmer. Check your CTE tables for polymers, and all will become clear.
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> The belt has problems because of the design. Stick shifts make things worse. Looser belts stay on better, but wear out faster. That around the corner thing might be fine for an econo car, but run a turbo to redline a bunch of times, and, well, the result is obvious! After all, the fan on a water pumper is WAY more massive than a Corvair fan, and they stay on, even without the viscous clutch!
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> John Roberts
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