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03-24-2021, 07:54 AM | #21 |
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Join Date: Dec 2019
Posts: 1,196
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Re: Head stud repair with insert...Q
Torque is used to put the stud in tension. This allows the assembly to be made without a locking device and provides a stable basis for heat cycling. In my experience .6 is an adequate depth of threads for a 7/16th NC stud.
Use a magnetic base drill (rent one) to insure the pilot hole for the insert is square to the deck. Drilling by hand can result in an offset pilot hole, placing two forces on the stud when tensioned. I prefer the integrity of a timesert and use anaerobic sealant on installation (loctite). Anaerobic means in the absence of air it cures, given the weakness and ductility of ford grey iron castings the sealant actually helps support the assembly by filling any void as well as locking it. |
03-25-2021, 11:40 PM | #22 | |
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Join Date: May 2010
Location: South California
Posts: 6,188
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Re: Head stud repair with insert...Q
Quote:
Thanks for your input ! Very helpful. I’ll check on timesert for comparative detail with others I’ve studied. Don’t know of magnetic base drill. Sounds good idea. I am terrible at drilling straight. With shakes and arithritis hands, that aint happening. That wont keep me from trying. BTW - Im familiar with ‘anaerobic’ .. sealant. But why not just use 2 part epoxy of some sort ? Especially , if hru to water ? Last edited by hardtimes; 03-26-2021 at 12:03 AM. Reason: Xxxxx |
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03-26-2021, 12:14 AM | #23 |
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Join Date: Mar 2021
Posts: 128
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Re: Head stud repair with insert...Q
Hardtimes, To get your holes straight just use a cylinder head. Mark the holes you want to drill out for inserts on the head with chalk, I used heli-coils, and use the proper drill for the insert. Use three or four studs to hold the head on and drill away. works every time. Rick.
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03-26-2021, 10:29 AM | #24 | |
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Join Date: May 2016
Location: Glide, Oregon
Posts: 1,334
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Re: Head stud repair with insert...Q
Quote:
https://www.brattons.com/over-size-t...long-stud.html
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Ruth "Sometimes you really DO need to read the whole thread" Last edited by Ruth; 03-26-2021 at 10:39 AM. |
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