Why are my pulleys as shiny as a mirror
Thread Starter
Newbie
Joined: Jun 2010
Posts: 13
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Model: Cherokee
Why are my pulleys as shiny as a mirror
My water pump, electric fan and tension pulleys look like they've been buffed and polished to a mirror shine. The back of the belt goes around these pulleys so I assume the belt is slipping on them? Anybody got an answer for this?
Thread Starter
Newbie
Joined: Jun 2010
Posts: 13
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Model: Cherokee
CF Veteran
Joined: Jul 2010
Posts: 4,930
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From: 802
Year: 99
Model: Cherokee
Engine: 4.0
mine are pretty clean.. idk about shinny, but def. very clean... you should check the belt for stress signs like cracks, rips, etc. i know someone already mentioned a too loose/tight belt...
CF Veteran
Joined: Mar 2009
Posts: 2,750
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From: Visalia, Kalifornia, ussa
Year: 1996
Model: Cherokee
Engine: 4.0
Its not a XJ thing it's physics, Shinny pulleys are normal for ANY belt driven application, even if a cog belt. They amount of brightness, to the shinny, varies buy pulley material. Moving object ALWAYS create friction.
Thread Starter
Newbie
Joined: Jun 2010
Posts: 13
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Model: Cherokee
LOl. I know it's not an XJ thing, I just can't believe I've had 3 XJ's, 1 TJ, 2 CJ's and 2 YJ's and never noticed.
Senior Member
Joined: Jun 2009
Posts: 540
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From: SW Colorado
Year: 1998
Model: Cherokee
Engine: 4.0 6cyl
Yep exactly the friction created by the belt moving "buffs" the pulleys in a way. This is 100% normal
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