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spammy
Twinstar
Joined: Jan 29, 2012
Posts: 227
Location: Adelaide
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Posted:
Thu Oct 22, 2020 4:47 pm |
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So whilst removing the camshaft holders one of the bolts broke with the thread deep in the hole. I thought bolts might break over torquing them but not loosening them. So I had some HSS drill bits lying around and I wanted to try and drill through the center and hammer in lightly with an 'easy out' screw extractor but the drill bit didn't make a dent. So off to the hardware shop to buy a 3/32 cobalt drill bit and it worked great, metal filings straight away. The easy out went in and the broken bolt thread came out. It all worked out but I hate broken bolt heads😊 |
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swiftnick
Black CB900F
Joined: Sep 01, 2006
Posts: 1688
Location: Farmington Hills, MI
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Posted:
Thu Oct 22, 2020 6:57 pm |
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Those bolts snap when you try to undo them if they were overtightened previously. Always use a torque wrench and or better bolts. |
_________________ 1982 CB900FC (UK Version) 1 owner
1983 CB1100RD (Fastest, red and blue)
1975 CB400 four
2012 ST1300
1982 CX500 Turbo
1991 FJ1200
1976 CB750 Super Sport
1986 VFR750F
1985 VF1000R |
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1337
Black CB750F
Joined: May 11, 2014
Posts: 1011
Location: San Diego
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Posted:
Thu Oct 22, 2020 7:25 pm |
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Get the higher strength bolts from Genesound on this forum. |
_________________ 1983 Honda CB1100F
1980 Suzuki GS1000E
2009 Yamaha FZ1
2006 H-D Fatboy |
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techie66
Hawk
Joined: May 28, 2009
Posts: 465
Location: Jacksonville, NC
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Posted:
Fri Oct 23, 2020 1:41 am |
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+1 on hating broken bolts! Always feels good when it comes out. |
_________________ Jacob
1983 CB1100F Blue
2010 HD XL1200X 48
My Mods Page |
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genesound
Red CB1100F
Joined: Feb 20, 2006
Posts: 11926
Location: Studio City, California
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Posted:
Fri Oct 23, 2020 7:57 pm |
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It might help if you hit the bolts on the head with a small hammer (maybe use drift) before trying to break them loose. |
_________________
We don\'t see things as they are
we see things as we are
Viton Valve Stem Seals
12.9 Cam Holder Bolts
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spammy
Twinstar
Joined: Jan 29, 2012
Posts: 227
Location: Adelaide
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Posted:
Sat Oct 24, 2020 5:39 am |
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