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Thread: main bolts

  1. #1
    Join Date
    Jan 2006
    Clinton twp. MI

    main bolts

    Has any one ever had any success with reusing their OEM main bolts and/or head bolts. I haven't seen any thing about them being a torque to yield bolt. I have always replaced with ARP studs or new bolts, but this is a budget build and I am looking to reuse with high mileage success.

  2. #2
    Join Date
    Jun 2009
    Toledo, ohio
    I don't be leave you can reuse any head bolts. i for got why though lol.

  3. #3
    Join Date
    Jun 2009
    Toledo, ohio
    found it.

    Do not reuse the cylinder head bolts. New cylinder head bolts must be used. The cylinder head bolts are torque-to-yield bolts and cannot be reused once the initial torque is applied. During the initial torque of the cylinder head bolt, the cylinder head bolt is stretched to achieve proper clamp load, which will not be achieved if a used cylinder head bolt is torqued again. A stretched cylinder head bolt can also break when torqued. Failure to replace the used cylinder head bolts with NEW cylinder head bolts can lead to improper clamp loads and extensive engine damage.

  4. #4
    Join Date
    Sep 2004
    Everyone that knows better will suggest that you use ARP head studs, which are reusable. The factory head bolts ARE NOT reusable. I have reused the main bolts with success, so I'm sure they are reusable.
    1994 SC
    4.5L Twin Turbo SVO
    Project GTFD

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