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Thread: Misfire low/no compression

  1. #1
    Join Date
    Nov 2012
    Location
    CLE, OH
    Posts
    10
    My Cars
    750i, X5

    N62 Misfire - no compression - cylinders 1-2-3-4

    I have a 750i with N62 engine in which I did a valve stem seal replacement using the AGA tool. After everything is back together it runs terrible. The scanner reads several codes such as CAM sensor and misfire on cylinders 1-2-3-4. I replaced the CAM sensors same code and problem. Then did a compression test, all cylinders on the troubled side have zero compression. This is to my surprise because the car ran fine prior to doing the job, and I also hand turned the engine prior to finishing the job just in case, and there was no problems. Could there be a broken wire, bad IVM computer, the timing / Cam “slipped”, or something else? I am out of ideas other than bent valves, but the car ran fine prior it just smoked bad.
    Last edited by brv44141; 05-23-2018 at 10:11 AM. Reason: Added keywords

  2. #2
    Join Date
    Aug 2017
    Location
    Los Altos,Ca
    Posts
    1
    My Cars
    2001 330i, 2001 X5
    I have posted that I ran into the same issue. Wondering if you managed to fix it.

    Thanks,
    Ghassan...

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