Question about 1994 Mercury Cougar
The idler pulley is not attached to any internal engine parts. It's job is to route the belt and to make sure the belt gets sufficient friction on the pulleys (it make it wrap around more if the outer surface of the pulley for more "traction") It is necessary, but it is just a pulley and a bearing.
Posted on Dec 10, 2009
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Posted on Jan 02, 2017
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