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Thread: Help Finding TDC

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    Basic Member Nooch13's Avatar

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    Help Finding TDC

    So I just did ARP head studs on my 3rd Gen 6.7L.

    There is a little rust on the balancer, so I can’t see the TDC mark.

    How else can I find it??


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  3. Top Of Page | #2
    DDP's Avatar

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    Re: Help Finding TDC

    Quote Originally Posted by Nooch13 View Post
    So I just did ARP head studs on my 3rd gen 6.7. There is a little rust on the balancer, so I can’t see the TDC mark. How else can I find it??

    Check to see if cylinder 1 intake and exhaust are loose.

    If they are then start working on it


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    Basic Member Nooch13's Avatar

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    Re: Help Finding TDC

    So update I got the lash done, I think...now it appears to be missing and blowing white smoke...ran fine before head studs and I went one at a time, so I’d assume hg is fine


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    DDP's Avatar

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    Re: Help Finding TDC

    Quote Originally Posted by Nooch13 View Post
    So update I got the lash done, I think...now it appears to be missing and blowing white smoke...ran fine before head studs and I went one at a time, so I’d assume hg is fine

    Hmm... check the valve lash again as they may be a little off.

    Do you see any bubbling of the coolant tank?

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    Basic Member Nooch13's Avatar

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    Re: Help Finding TDC

    I don’t see any bubbling, no...will redo the lash today, first time I’ve ever done that. Thanks for the help/advice


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    Basic Member Nooch13's Avatar

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    Re: Help Finding TDC

    Also, here is a lesson for everyone else, watch what you are crawling on in the engine bay.

    I snapped off my exhaust back pressure sensor.

    Don’t think that would be the cause though.


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  13. Top Of Page | #7
    I WILL STAND! AK Bob's Avatar

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    Re: Help Finding TDC

    Quote Originally Posted by Nooch13 View Post
    Also, here is a lesson for everyone else, watch what you are crawling on in the engine bay.

    I snapped off my exhaust back pressure sensor.

    Don’t think that would be the cause though.
    I don’t know what the symptoms are, but on the 07.5-12 model trucks, the exhaust back pressure must stay plugged in and operate correctly.


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    Basic Member Nooch13's Avatar

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    Re: Help Finding TDC

    Embarrassingly, I think I was 360 off on my valve lash.

    Working great now, even with that back pressure sensor snapped in 2.

    I am fully deleted with a tuner, so that may be dead anyway no codes popping!

    Thanks all


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