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Broken Bolt Problem |
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mdh157
AMC Apprentice Joined: Dec/19/2007 Location: Pennsylvania Status: Offline Points: 209 |
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Posted: Jun/19/2021 at 1:15pm |
I am working on my 67 Ambo and one of the bolts on the gooseneck broke off when I was trying to remove it. Well I went to use a reverse drill bit and the drill bit broke off in the hole so now I cannot put an extraction bit on it.
Anyone have any ideas on what else I can try? It's a bit higher than flush but not enough to get anything around it. I am not taking the engine apart to try to replace a thermostat.
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'67 Ambassador DPL/3 spd/OD
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Skwishy
AMC Apprentice Joined: Feb/01/2018 Location: Wisconsin Status: Offline Points: 208 |
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Best off removing the thermostat housing and then get at the rest of the bolt that way. If its sheared in the manifold and you cant get anything on it, weld a nut on the old bolt and then try backing it off. Other wise you'll probably be removing the intake manifold
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mdh157
AMC Apprentice Joined: Dec/19/2007 Location: Pennsylvania Status: Offline Points: 209 |
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The housing is already off. I do not have a welder so i guess the car is going to sit in the garage.
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'67 Ambassador DPL/3 spd/OD
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tufcj
Supporter of TheAMCForum Supporter of TheAMCForum Joined: Jul/10/2007 Location: Watkins, CO Status: Offline Points: 4097 |
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You might go to McMAster Carr and buy a cobalt drill bit. They will drill thru most high speed steel bits. Buy the size recommended for the 5/16" bolt, so you can re-tap the hole after drilling. Saved my butt more than once. They are pricey, but may save you from pulling the manifold. Bob tufcj
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69 AMX
74 Javelin AMX 67 Rogue If you need a tool and don't buy it... you'll eventually pay for it... and not have it. Henry Ford |
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bigbad69
Supporter of TheAMCForum Joined: Jul/02/2007 Location: Ottawa, Ont. Status: Offline Points: 6685 |
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Install the thermostat housing and use it as a drill guide. With an oilite bushing to centre the bit and hold it square, drilling out the broken bolt will be easier. Choose a bushing that is snug with the housing and the drill bit. I used this technique on a broken exhaust manifold bolt that was flush with the head. Using the manifold as a template, I was able to drill out the old bolt and re-tap without having to remove the head.
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69 Javelin SST BBO 390 T10
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mdh157
AMC Apprentice Joined: Dec/19/2007 Location: Pennsylvania Status: Offline Points: 209 |
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Thanks for the ideas everyone. will try them in the next few days.
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'67 Ambassador DPL/3 spd/OD
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BU1
AMC Addicted Joined: Aug/11/2016 Location: MN Status: Online Points: 2018 |
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Find a buddy with a 110 volt wire welder. Weld a fender washer to the broken stud, then weld a nut to the washer. Easy peasy.
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AMO #2726
#1 1968 AMX Rally Green 343 Z code 4spd since 1975 #02642 #2 1968 AMX Rally Green 290 N code 4spd since 2019 #02959 |
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6PakBee
Supporter of TheAMCForum Charter Member Joined: Jul/01/2007 Location: North Dakota Status: Offline Points: 5458 |
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I'll second this suggestion. I drilled out a Snap-On easy-out that I had broken off with a solid carbide drill bit.
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Roger Gazur
1969 'B' Scheme SC/Rambler 1970 RWB 4-spd Machine 1970 Sonic Silver auto AMX All project cars. Forum Cockroach |
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billd
Moderator Group Forum Administrator Joined: Jun/27/2007 Location: Iowa Status: Offline Points: 30894 |
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Yes - this ensures a straight/true drilling. IF you are off even a bit you won't be a happy person. I have a jar of spacers and bushings - amazing the uses a person can find for 50 year old bushings, etc. |
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Hurst390
AMC Addicted Joined: Apr/20/2008 Location: secret Status: Offline Points: 5822 |
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Your going to have to go in and break up the drill bit with a flat nosed punch or/and a narrow chisel. its not that difficult. Once you got the bit out re-drill it with a jig mentioned above.
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SC/Hurst Rambler
11.62 120 100% Street Legal |
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