Bent valves

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V6: 3.0, 3.2 LA3, 3.6 LY7, 3.6 DI LLT Discussion, Bent valves in Cadillac Engine Discussion; I have a 2007 STS 3.6 , 103000 miles, last Feburary when i go down to -13 deg, went to ...
  1. #1
    Theduck is offline Cadillac Owners Member
    Automobile(s): 2007 sts
    Join Date
    Feb 2014

    Bent valves

    I have a 2007 STS 3.6 , 103000 miles, last Feburary when i go down to -13 deg, went to go to work car would not start, jump forward all intake valves on passenger side bent, my question is what was the cause of failure, car ran, when it was taken apart the timing chain was loose on that side, need to pull other head as compression was below specs on that side also. Just wondering what course of action i need to take, any help would be appreciated.

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  3. #2
    Acdcpsp is offline Cadillac Owners Fanatic
    Automobile(s): 2008 CTS4 3.6 LY7
    Join Date
    Feb 2013

    Re: Bent valves

    Timing Changes in the earlier versions of the 3.6 are known for developing slack. This can happen when the oil level becomes lower from it burning oil and the tensors not having enough oil pressure to keep the correct tension.

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