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Old 09-11-2007, 08:43 PM
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Broken bolt.

Didn't know were to post this so if its in the wrong place I'm sorry.
I was tryying to take off the waterneck and replace the thermostat and one of the bolts broke off. Any help would be great. I dont want to take off the manifold if I dont have to but I dont see any other way as of yet.
The bolt broke above the neck so there is about 1/2 inch sticking up. It is soaking in penetrating oil now.
motor is a 1990 350, stock manifold.

Thank you for any help.

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Old 09-11-2007, 09:05 PM
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Try heating the intake before pulling the broken bolt. Maybe even smack the top of the broken bolt with a hammer before pulling it too. If that doesn't work you can try a screw extractor. If THAT doesn't work try out your drilling skills and drill a hole dead center down the bolt and drill it larger and larger until you reach the tap drill size (or even slightly smaller), once you get there you might be able to take a punch or chisel and fold the remains of the bolt in on itself then pull it out with some needle nose pliers. T-15s or carbide bits work far better than high speed bits do. It's worth a shot because if you mess up the threads there's always heli-coils.
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Old 09-11-2007, 10:01 PM
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I will try what you say. Doing some searching on the board heat seems to be what most say and also freeze it with freon so I will try bolth and see what happens.

Thanks Blazin. I will let ya know if it works.
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Old 09-12-2007, 05:42 AM
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If a half inch is sticking out ....soak it down with penetratiing oil....PB Blaster works for me....then tap on it some and then try using a stud remover to take it out.
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Old 09-12-2007, 05:58 AM
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Don't bother trying to freeze the bolt as you can't get it cold enough to help anything. If you can heat the manifold just around the bolt area then that will help but you don't want to get it too hot. (not red hot!) If you have a half inch sticking out then grasp that as tightly as possible with Vise-Grips and then while pulling on the 'Grips take a small hammer and tap the bolt on top, hold a steady pressure and keep tapping until it breaks loose.
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Old 09-12-2007, 10:39 AM
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Here it is, my sure fire way to remove rusted bolts...

Tip of the day number 9

Brian
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Old 09-17-2007, 04:03 PM
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This wiki article may be helpful to you: Removing rusted and broken fasteners.
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Old 09-18-2007, 03:07 PM
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If you have a 1/2" sticking out, slip a larger nut over the broken stud and weld the nut to it. After welding, work the nut back and forth a little at a time. If you try to back it out all at once, chances are it will snap again. Let us know how everything works out.

Kevin
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Old 09-18-2007, 10:17 PM
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We had the same problem....Broke off nearly flush though.....Tried and broke an easy out then got a performer eps intake....have since tried welding a nut but to no avail so the stock intake sets on a shelf in the edelbrock box under the stock carb....
Shane

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