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ly7 timing chain damage
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  1. V6 Engine Tech (LY7)
    Hey I'm compiling all my posts into one ongoing. Summary: The car is a '05 CTS 90,000 which has the LY7 V6 Engine (same used in many GM brands) This particular engine has a higher than normal timing failure rate. In my case worn tensioner brackets and a worn chain led to a primary chain slip...
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