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3500 dully plastic fender crack in cold temprature

Discussion in 'Chevy Trucks' started by rich414, Jan 25, 2011.

  1. rich414

    rich414 Senior Member
    Messages: 294

    I have a 2004 3500hd dully, I live in a COLD climate and I am on my 2nd set of rear fenders or quarter panels.

    We have had temperatures in the ZEROS over the last month and a few cracks have appeared in the lower section of the rear panels. Not sure how the cracks happen, in one area of the panel, I backed into a snow pile and the fender just shattered. I have the pieces. I am not alone in this, all but one of the 3500 in my town have busted, crack, missing sections of rear fenders. I just want to fix the cracks and put the pieces back

    I have drilled each end of the cracks and the cracks have stopped running.

    When I disposed of the first set of fenders, I kept a piece of the fender to test repair techniques. Yesterday I found the test piece of fender in the garage which is about 60 degrees, and I tried to bust the piece so that I could fiberglass it back together. I could not break the piece, it just bent. I set the test piece outside for a few hours, the temp was 20 degrees and I had no problem snapping a section off.

    So I sanded the back sides of both section, taped the section together on the front, with a 1/16" gap and fiberglassed the pieces together with 2 layers of cloth... Today, I gave the repair a test and I was able to separate the repair into to 2 pieces without much effort, the failure occurred at the fiberglass plastic bond.

    So there is my story. Fiberglass is not the repair solution.
    How do I fix the fenders?
    What is the plastic compound that the fenders are made from?
    The wife said that a flatbed is NOT an option...
  2. musclecarboy

    musclecarboy 2000 Club Member
    Messages: 2,303

    It sucks.... both mine are busted. Lucky I don't have a wife and I'm going with an aluminum flatbed. Good Luck looking for a solution!