Head Ache |
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Head Ache |
bkrantz |
May 24 2021, 07:37 PM
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#1
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914 Guru Group: Members Posts: 7,801 Joined: 3-August 19 From: SW Colorado Member No.: 23,343 Region Association: Rocky Mountains |
As I showed in my rebuild thread, I found one of my cylinder heads with an insert for one exhaust stud, but installed at an angle. The other head has one oversize stud hole (9mm?).
My first thoughts: remove the insert and inspect the hole. I may attempt to drill a larger hole at the proper angle and install a bigger insert. If I do that, I may do the same for the other head, which will be the same hole position. Comments? Attached thumbnail(s) |
ClayPerrine |
May 25 2021, 09:37 AM
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#2
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Life's been good to me so far..... Group: Admin Posts: 15,512 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille |
The absolute best way is to have someone remove the insert, and TIG up the hole. Then re-face the surface around the hole, re-drill the hole straight with a 6.8mm drill, and re-tap it. To do it absolutely right requires a vertical milling machine.
Clay |
pilothyer |
May 25 2021, 10:10 AM
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#3
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Member Group: Members Posts: 838 Joined: 21-May 08 From: N. Alabama Member No.: 9,080 Region Association: South East States |
The absolute best way is to have someone remove the insert, and TIG up the hole. Then re-face the surface around the hole, re-drill the hole straight with a 6.8mm drill, and re-tap it. To do it absolutely right requires a vertical milling machine. Clay (IMG:style_emoticons/default/agree.gif) This would be the best way to address this problem. |
914_teener |
May 25 2021, 11:31 AM
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#4
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914 Guru Group: Members Posts: 5,205 Joined: 31-August 08 From: So. Cal Member No.: 9,489 Region Association: Southern California |
The absolute best way is to have someone remove the insert, and TIG up the hole. Then re-face the surface around the hole, re-drill the hole straight with a 6.8mm drill, and re-tap it. To do it absolutely right requires a vertical milling machine. Clay (IMG:style_emoticons/default/agree.gif) This would be the best way to address this problem. You are halfway to a new head given this fix. If I were rebuilding a TIV I'd just get new castings and spend the bucks. Just not worth it |
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