Section 01-1220 in the manual details how to repair the threaded head bolt holes. It says to use heli-coil and gives specific directions.

I don't know if there are larger bolts available or not. Likely not.

The owner of the nut and bolt store is telling me that he's never heard of an M12x1.75 thread pitch head bolt. I'm going to bring the pages from the manual to show him.

He asked that I stop by to talk with him so we can resolve this. We'll see how it comes out. More later.

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Power Generation Specialist.

We judge ourselves by our intent.
We judge others by their actions.