3406 exhaust manifold stud hole depth

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Gumper, Jul 3, 2019.

  1. Gumper

    Gumper Road Train Member

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    Patience and luck.
     
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  3. Rick Wilmath

    Rick Wilmath Light Load Member

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    May 15, 2016
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    So how much help was the left handed drill bits. I can see they would work great if the stud was loose but it is in there tight. Were you able to loosen up some of the studs with a left handed bit?
     
  4. Gumper

    Gumper Road Train Member

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    I was able to get two of them out that way, but still had to drill over half of the stud before spinning out.
     
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