How to remove a broken bolt in manifold?

[BamaFan]

My son has an 1988 F-150 and the thermostat failed. Went to replace it and one of the bolts is easily accessible but was hard as heck to get out (I don't think it's ever been out). The other bolt is almost impossible to access but I was able to get a wrench on it and promptly shear the bolt head off. So now I'm wondering if there's a better tool than an easy out type extractor to try to get the bolt out. There is maybe 1/4" nub hanging out but no real way to get any leverage with vise grips, etc. Just wondering if there is a magic trick I'm not aware of... What say you grease monkeys of the ODT?

 

[jeep78]

Left handed drill bit/extractor combo

You have to be able to drill directly down the bolt.

There are welders that weld a nut on the broken stub and use a wrench to back it out
My welding is not that good , I am used to drilling.

 

[jeep78]

Start soaking it with some penetrating oil now

 

[Trader Guy]

Start with a can of Kroil penetrating oil.
If you can drill it and use a screw extractor that would be next.

Plan B if you cant run that out, weld a sacrificial piece on it. Keep it lubed try to turn it. If that doesn't work put a little heat on .

 

[joe686]

Welding a nut on the stud usually works for me. Heating the stud and spraying it with a penetrating oil and working it back and fourth with vice grips. But as you stated it’s always in a tight spot.

 

[BigMike]

Soak the heck out of it with some type of penetrating oil. If you can get to it, grind a flat grove in the nub that a good size flat head screwdriver will fit in and back it out that way. If you soak it and then ping it ( hit it with something like driving a nail) and let it sit, you should be able to back it out.

 

[jeep78]

You probably already know, but you do not want to break an extractor or eazy-out in the bolt. You will have a real mess if that happens

 

[jeep78]

Just remembered , the last one I did I used an air hammer and screw knocker .

1030 at night, truck had to roll before dawn. I had drill, bits, and some torx bits with me. The bits are hardened, so I drilled a slightly undersized hole, using lots of penetrating oil. Put my screw knocker in my rivet gun using a torx I beat in the hole, and started teasing the trigger. Rocked it back and forth and got it out rather quickly.

I was mainly using tools I had on hand and I was used to using. It could have easily gone bad, but it worked that night.

https://www.autotoolworld.com/Brown...erm=4585238368591926&utm_content=All Products

 

[buttplate]

You probably already know, but you do not want to break an extractor or eazy-out in the bolt. You will have a real mess if that happens

And the chances of breaking off an EZout are much better than the chances of it working!!!!

 

[Trader Guy]

Yes, you are right. He can try anything and everything. If it all goes to heck a new Intake manifold is not an extremely hard project to replace.