Well, that didn't last long... I finally got the left hand thread bolts, and made threads. But the bolt just went in, but the old didn't come out. I tried in two different bolts, no success. Then I drilled the holes bigger first to 7 mm, and then to 8 mm. After that I tried to remove the remainings ...

I tested to remove one "snapped" bolt. I cut the bolt with a grinder so it would break when it bottoms out. I tightened it quite tight before it broke. The head was about 7 mm deep. The I put the aluminum protector inside and started to heat the bolt with a TIG. Well, the aluminum "pr...

Ok, thanks for the info. I didn't think it that way, but you are right. I was hoping that I don't have to open this motor!

I have one broken crank where I'm going to test TIG weldging. I use aluminium as a protect the threads, lets see what happens.

I changed to the other MIG, and tried to get the bolt with that. I got a better weld, but it didn't open. I have now tried it seven times, time to do some other tricks. My idea of that oil pressure using as a drilling guide was great :) I put the adpter to the holes which had threads visible. One ha...

Yes I have access to a pulse TIG (Kemppi Mastertig 2800) But it is on my friends garage, and moving the motor there is not that easy. I don't know much about the pulses though, how should it be adjusted? I have welded something with it, but with the default settings. I have watched that video, it is...

The bolt size is M10 x 1mm and those are 12.9 grade, but I could drill those easily with cobalt drills. I don't have left hand bolts or thread tap. That sounds a good idea though. I'm really afraid to damage the threads, since then it makes this project much bigger and more expensive. I have some ol...

Hi, I have a motor which has a crankshaft with broken flywheel bolts. One guy installed flywheel with too long bolts, and flywheel was loose. Then he drove it until only one bolt was holding the flywheel! The others were sheared off. Some quite deep, some on the surface. I have removed bolts from th...