drilled hole too far to mount head and jug

Curious about this too haha you drilled into the crankcase? Are you trying to put a 48 cc top end on a 66 cc bottom?
 
Curious about this too haha you drilled into the crankcase? Are you trying to put a 48 cc top end on a 66 cc bottom?

going to install a heli-coil because of a stripped
hole but went too far. I guess the crankcase is toast?
 
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Sorry I don't know what that is , you mean the jug rods cross threaded the holes in the crankcase? Some pics would be good * just Google heli coil and reason I didn't know is because I call those threaded inserts
 
Sorry I don't know what that is , you mean the jug rods cross threaded the holes in the crankcase? Some pics would be good * just Google heli coil and reason I didn't know is because I call those threaded inserts

Just 1 hole was stripped. I was going to install a thread insert but went a little too far
with my drill. I wonder if I can go ahead with my plan and maybe use some Loctite or Jb weld to seal
the hole. Any suggestions would be appreciated. If anyone has another idea that'd be great. I wouldn't mind buying a new crankcase if they're not too expensive. Just the case. And yes, they are the four very long studs that go through the head, jug and then in to the crank case.
 
that'll prob be ok the bolt should seal it if you loctite it into the thread insert maybe loctite the thread insert into the crankcase too?
 
No no no, don't lock tight it, you really shouldn't lock tight a helicoil. As far as drilling too far just get some jb weld and a bit of grease on the end of the bolt, drive the bolt almost all the way in, stop where it normally stops, use another bolt in another hole to figure that out. You will need to split the case for this part. Put jb weld into the hole from the back, and try to avoid letting air bubbles form. The grease keeps the epoxy from grabbing the bolt.

Option 2: if you don't care about being able to remove the bolt in the future, put strong tape like gorilla tape on the underside of the hole inside the crankcase, this is way easier without a crank in the way but do as you see fit, put a blob of epoxy the size of a quarter into the hole and torque the bolt in but not farther than it would normally go. Once it is set its set forever but won't leak.

Final option is put a tiny bit of tissue or toilet paper into the bottom of the hole, then fill only the bottom of it with a milliliter or 2 of epoxy. To do it accurately get one of those cheap baby medicine or pet medicine dispensers, looks like a syringe. They even have milliliter marks on them how great! So put a drop of water, A SINGLE DROP, down into the hole to wet the tissue, pack it down with a smaller bolt, put epoxy in and wait for cure, afterwards you can use the helicoil as normal and remove the bolt if needed, leave the tissue it will disintegrate in time harmlessly.
 
No no no, don't lock tight it, you really shouldn't lock tight a helicoil. As far as drilling too far just get some jb weld and a bit of grease on the end of the bolt, drive the bolt almost all the way in, stop where it normally stops, use another bolt in another hole to figure that out. You will need to split the case for this part. Put jb weld into the hole from the back, and try to avoid letting air bubbles form. The grease keeps the epoxy from grabbing the bolt.

Option 2: if you don't care about being able to remove the bolt in the future, put strong tape like gorilla tape on the underside of the hole inside the crankcase, this is way easier without a crank in the way but do as you see fit, put a blob of epoxy the size of a quarter into the hole and torque the bolt in but not farther than it would normally go. Once it is set its set forever but won't leak.

Final option is put a tiny bit of tissue or toilet paper into the bottom of the hole, then fill only the bottom of it with a milliliter or 2 of epoxy. To do it accurately get one of those cheap baby medicine or pet medicine dispensers, looks like a syringe. They even have milliliter marks on them how great! So put a drop of water, A SINGLE DROP, down into the hole to wet the tissue, pack it down with a smaller bolt, put epoxy in and wait for cure, afterwards you can use the helicoil as normal and remove the bolt if needed, leave the tissue it will disintegrate in time harmlessly.
 
Thanks for the very detailed repair ideas. Have you tried any of these? I really appreciate
it. I have one more problem I didn't mention, because I didn't notice till recently. When I
drilled the hole too far, I scored the top side/corner of the crank. Maybe this will help with the balance issues I keep reading about. The glass is half full, until I drink the rest of my beer.
 
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