Broken off bolt

Beastmode54 · Feb 12, 2007

Ok, i finally got my 69 up and going. I noticedi was leaking coolant from thermostat housing unit. When i was taking off the top left bolt, the bolt head broke off. Any trick tricks and getting the rest off the bolt out, and the bolt is flush with the bolt hole.

And does anyone knoe where i can get a replacement resevior tank.

1969 302 5.0 coupe

1320stang · Feb 12, 2007

Oops, you can take a dremel and try and cut a slot in the bolt, then use PB Blaster or a propane torch and a candle to get some wax wicked into the threads. Otherwise, you can drill a hole in it and use a reverse twist drill bit to back it out.

spirockp · Feb 12, 2007

Should be simple. They sell those back out drill bits. Drill a small hole inside the broken bolt and use teh correct size back out bit.

Beastmode54 · Feb 12, 2007

Cool, thanks ill try that. Gonna try that in the next week or 2, any ideas on finding a coolant resevior

rhyno9 · Feb 12, 2007

Get a torch and heat the sucker up. I would use a mapp torch if it is an iron manifold or if it's aluminum you might be able to use propane. Aluminum conducts heat really well so it wouldn't take long. Aluminum also doesn't glow redhot the way steel does. For aluminum I would heat for 10-20 seconds and then try and repeat until it's loose. The heat will loosen it up and then it should come out really easy. Latch onto it with a vice grips and twist it out.

Put some anti-seize on the bolts before reassembly

Don't screw around with easy outs. They just seem to snap off and then you've got a real mess. That hardened steel from the easy out is a nightmare to drill through.

69 Rustang · Feb 12, 2007

I had the same experience with easy-outs. Brand new and snap!

1320stang · Feb 13, 2007

rhyno9 said:
Get a torch and heat the sucker up. I would use a mapp torch if it is an iron manifold or if it's aluminum you might be able to use propane. Aluminum conducts heat really well so it wouldn't take long. Aluminum also doesn't glow redhot the way steel does. For aluminum I would heat for 10-20 seconds and then try and repeat until it's loose. The heat will loosen it up and then it should come out really easy. Latch onto it with a vice grips and twist it out.

Put some anti-seize on the bolts before reassembly

Don't screw around with easy outs. They just seem to snap off and then you've got a real mess. That hardened steel from the easy out is a nightmare to drill through.

But he said it's flush with the surface, what are you going to grab onto?

Broken off bolt

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