Any recommendations how can re-thread this withiut removing the motor or another fix? Anyone run the lower bolt alone and start fine for years?

 

buy a tap socket from amazon. a m10x1.50 tap. since i only strip the starting part of the whole. this resolved my issue.

 

Some things you can try:
A pick set, sometimes the bolt is actually loose in the hole that it snapped off in, and can be backed out with a pick set.
Hot glue stick, sometimes you can use a lighter on the end of a glue stick, and heat it up and squish it onto the bolt, if its loose, and can then be backed out.
Ease outs or reverse drill bits. Sometimes they will start drilling the hole, and then they will grab, and back the bolt right out for you.
Sometimes they add friction heat as well and helps break the bolt loose.

if you end up drilling out the bolts, make sure you don't apply too much pressure to the smaller pilot bits. If you break one off in the bolt, that hardened steel will be a pain to drill through with the rest of your larger bits.

 

something similar to these can work well if the project isn't too heavy duty.


Below are left handed drill bits and extractors. So if the drill bit bites into the bolt, it is backing the bolt out, not driving it into the transmission.




If these don't work, you may have to get square extractors, or weld a nut/bolt to the existing one, to get something to back out with.

 

Dude, reading comprehension.