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3.5 head

  1. New Member Introductions
    Hi, my name is Tim, and I am new to the forum and my '05 Colorado with the 3.5. On the way home from purchasing it, it kicked the PO302 code, so I read up on it and completed a compression test and leak down test. The compression test showed two cylinders were 10% low, and the leakdown test...
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