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Header stud extraction 19 Jul 2021 03:35 #851997

  • motoaddict
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I sheared off the threads of a header stud. Any advice? I sprayed with a penetrant last night and today I plan to drill into it and try an ez-out extractor. Then plan to make a new one out of a 6mm alloy steel screw.

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Header stud extraction 19 Jul 2021 04:05 #852001

  • hardrockminer
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You can buy studs at any dealer.
I have a couple of Z1B's restored, an '80 KZ1000LTD restored, a 1981 KZ550 restored and a 2008 KLR 650 for off road fun. My wife has a 2019 Suzuki DR 650 for on and off road.

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Header stud extraction 19 Jul 2021 05:20 #852006

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luckily you have stud left, heat at head, heat gun or propane, (remove tank),  al expands more than steel, studs are available, as per hrm, use never seize on install, good luck
Z1A AND 81 650

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Header stud extraction 19 Jul 2021 07:16 #852013

  • Mikaw
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Drill it? Unless I’m looking at the wrong stud you still have some exposed. Like mentioned. Heat, penetrate oil, and patients. Grip the stud as close to the head as possible. Loosen, tighten, loosen more, tighten, do this back and forth till it’s freed up. Caution, these can be deceiving and you can see the stud moving but it’s really twisting below the surface. I snapped 2 off thinking they were moving but not. Take your time. You could try several heat cycles before attempting to remove. Tapping on the stud sharply but not hard has also worked, as it shocks the stud releasing the bond. 
1976 KZ 900 A4 kzrider.com/forum/11-projects/613548-1976-kz-900-a4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.

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Header stud extraction 19 Jul 2021 13:40 #852041

  • motoaddict
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Thanks for all the advice. Torching it then working it back and forth with a vice grip did the trick. 
The following user(s) said Thank You: Nessism, Mikaw

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Header stud extraction 19 Jul 2021 15:22 #852048

  • ckahleer
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Can a head be damaged, (melted) when heated with a propane tourch?

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Header stud extraction 19 Jul 2021 15:33 #852049

  • SWest
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NO NOT HOT ENOUGH
Z1b1000 1975 Z1b
Opinions expressed by me do not reflect those of the the staff or members
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229

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Header stud extraction 19 Jul 2021 16:02 #852051

  • Nessism
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never Never NEVER use an ez-out for something like that.  It's virtually guranteed to break off before the old screw budges.

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Header stud extraction 20 Jul 2021 04:03 #852094

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Can a head be damaged, (melted) when heated with a propane tourch?

I used a MAPP gas torch which is hotter than propane and nothing melted. The aluminum dissipates the heat readily. Just be careful and don't aim it at gaskets or paint/plastic.
 

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Header stud extraction 20 Jul 2021 06:57 #852105

  • ghostdive
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I'll chime in and say that I HAVE melted a piece of broken-off block with MAP gas. Just don't go crazy with it and you'll be okay.
1982 KZ750 Spectre - Dyna 2.2 coils + 8mm wires, WG coil relay, SH775 R/R, Mikuni BS34s - 40P/122.5M, Progressive fork springs/KZ900 rear shocks, Vance & Hines 4-1

1982 KZ305 CSR - 18" KZ400 rear wheel

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