Frozen head Bolts

[phatdaddy]

been there, done that....
except this is where i usually break off the e z out down in there.

[BRIELLY]

I don't think I will chance the ez out. Ive read too many horror stories of them breaking and being impossible to drill out. I'm hoping to just keep drilling with the left hand bit until it breaks free. If i have to take a dremel and slowly grind it away then thats what will have to be done. I may drill a small hole into the block at a 90 degree angle so I can shoot some penetrating fluid in to where the threads are to help it along.

[BRIELLY]

When I got back to the boat today i realized I was looking at the wrong area. The bolt was actually broken half an inch inside the block but luckily it was a clean, flat break. I center punched it and started with the left hand bits. I also drilled a small hole into the block at a 90 degree angle to the threads to get more penetrating fluid in there. The drilling wasn't go very strait and i almost gave up. Too much more off center and I would have drilled into the water jacket and it would have been game over. I straightened the hole with my dremel and went to the largest size bit. A few seconds and that sucker came right out. I did mess up some of the threads so I'll get some epoxy thread repair just to be safe. You gotta love the left hand drill bit! Thanks to everyone for their help. Hopefully there will be no more surprises on this project.

[captpete13]

glad to see you got em out. I have a full metric tap and die set. If you need any just let me know. Got to get that boat in the water. It's almost Tices shoal weather already.

[BRIELLY]

Thanks Pete I think at this point i don't want to mess with it any more. With my luck something will go wrong running the tap through the threads. I took the heads to a machine shop to have them milled and of course had to order some new bolts. Hopefully i can get it back together this week and move on to other things.