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Plastic vs. Steel idler pulleys

This is a discussion on Plastic vs. Steel idler pulleys within the External Engine forums, part of the LSx Technical Help Section category; Anyone have a preference or a reason(s) to use steel over factory plastic idler pulleys. Bearing quality etc. I've heard ...

  1. #1
    Junior Member hitempguy's Avatar
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    Triple Black M6
    2002 Camaro SS "Vert"

    Plastic vs. Steel idler pulleys

    Anyone have a preference or a reason(s) to use steel over factory plastic idler pulleys. Bearing quality etc. I've heard steel are better because they pull heat away from the bearing, but it seems the plastic fan or mini spoke design would move more air around the bearing area....

  2. #2
    Just me Y2KPewterSS's Avatar
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    Pewter metallic
    2000 Camaro SS

    My DD has plastic idler pulleys, they eventually melted and broke, which caused several other problems with the motor. Needless to say, I would prefer metal pulleys.

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