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Thread: snapped cam cap studs

  1. #1
    Join Date
    Mar 2018
    Location
    Ohio
    Posts
    88
    My Cars
    2001 BMW 325xi, e46, m54

    snapped cam cap studs

    Lol..... After a month I finally got the cylinder head bolted down properly. And onto the next step... And of course I snapped 2 of the studs for the camshaft bearing caps... Lmao... I think for one, I misread the torque value. It should have been 10ft lbs, and I was using 14... I was also using my 1/2in torque wrench, so in hindsight that was probably a mistake also 😂
    .. and now I get to wait another week for more parts before moving forward, sigh...

  2. #2
    Join Date
    Jul 2011
    Location
    Arlington, VA
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    2018 BMW M240i
    This gives you time to have a beer or two!

  3. #3
    Join Date
    Jun 2002
    Location
    Aberdeen, NC (yes, again)
    Posts
    23,672
    My Cars
    E39M5, E500 4WD
    Yes, the spec is 14 Nm (10 ft/lb)., and a 1/2 drive isn't right for that torque.

    I hope you are being extremely careful with tightening those nuts. The cam must be brought down perfectly square, each nut tightened 1/4 turn at a time, in sequence, unless you're using the official tool which holds down the cam. These cams are hollow, and will break very easily.

    Chris Powell
    Racer and Instructor since, well. decades, ok?
    Master Auto Tech, owner of German Motors of Aberdeen
    BMWCCA 274412
    German Motors is hiring ! https://www.bimmerforums.com/forum/s...1#post30831471

  4. #4
    Join Date
    Mar 2018
    Location
    Ohio
    Posts
    88
    My Cars
    2001 BMW 325xi, e46, m54
    Yes I was very careful about doing it in proper sequence. I believe I had the second and 6th lobes resting on the lifters. Then I tightened each nut a little at a time. I got everything hand tight. I was very careful up until the point where I used a 1/2in torque wrench and misread the torque values lol.

    While we're on the subject, I'll be needing to get a new torque wrench and I was looking at the digital torque reader that just attached to your rachet or whatever... Already own the 1/2in, should I just get the 3/8th or the digital? Just never used the digital one and not sure of the cons

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