plastic valve cover

  1. GM Guy

    Plastic valve covers on late model GMs

    Have any of you professional mechanics had issues with aftermarket plastic valve covers ( ok, maybe it's actually a cam cover) that include the PCV valve ? Gm 1.4L, 1.6L, 1.8L. I recently replaced a factory cover on an '08 Saturn Astra 1.8L n/a with an aftermarket part.. The problem was a...