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Thread: Anyone use Time-sert thread repair inserts for head bolt repair?

  1. #1
    Join Date
    Jan 2007
    Location
    Dayton Ohio
    Posts
    1,483

    Default Anyone use Time-sert thread repair inserts for head bolt repair?

    Last night tightened the head on my m30 and found out one of the bolt holes is stripped. Been looking on line and it appears that the Time-Sert inserts are the way to go. Has anyone used these to repair the head bolt holes in a iron block. If so what length of insert. I know the threads are M12 x 1.75. The blind holes are around 33-34 mm deep but you need about 6-7mm of free space at the bottom of the hole. The standard length sizes are 18, 24 and 30. I am leaning towards 24. Lots of write-ups for aluminum block but have not seen anything on a iron block repair

    Anyone?

  2. #2
    Join Date
    May 2004
    Location
    Japan
    Posts
    9,249

    Default

    I found
    TIME-SERT ® FREQUENTLY ASKED QUESTIONS
    ++ TIME-SERT Frequently Asked Questions ++ Time-Sert thread repair questions and answers for

    Thread Repairs


    Metalock Suits Following Materials: Aluminum, Cast iron, Steel, Brass etc,.
    Products

    TIME-SERT® on GSPD head bolt - Page 2 - ADVrider

    Any other Heli-Coil junkies in here? - Page 2

    I personally have no experience with these.

  3. #3
    Join Date
    Jan 2007
    Location
    Dayton Ohio
    Posts
    1,483

    Default

    Gales says go with Time-Sert but I need to know the length of the inserts. Bolts are M12 x 1.75. Based on my calculations I leaning towards the 24mm length insert



    Most sites say stay away from Helicoil for head repairs

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