Irv 115 #1 Posted September 5, 2014 Just picked up a 99 314-8 with the Kohler Command that has a broken stud where the muffler attaches. I can just get the tip of vise grips on what's left (about 1/8 in. and of course can't turn it out. I suppose the next step is to drill it out (unless someone has another idea). How far in should I drill? thanks for your thoughts. Share this post Link to post Share on other sites
KC9KAS 4,741 #2 Posted September 6, 2014 Heat it up with a torch and then touch it with wax. The wax will melt into the threads and "lubricate" it so you can turn it out. I recently welded a nut to a broken stud and then did the wax trick. Used a 3/8" drive ratchet and backed the sucker right out! 2 Share this post Link to post Share on other sites
Wayne 28 #3 Posted September 6, 2014 tap it with a ball peen hammer, use a cut off wheel on a die grinder to cut a slot and and impact driver in the slot before you get too crazy drilling , like turning out a screw. tapping it should loosen any rust that is holding it in... Share this post Link to post Share on other sites
km3h 543 #5 Posted September 6, 2014 If you have to drill it out, be very careful. Don't break off a drill bit. They are very hard and will cause you real problems. Drill in steps going to a larger bit slowly. If there is enough room to weld a not or a smaller diameter bold, that's what I'd do. Next best choice is the heat and wax job then cut a slot and impact wrench. Studs are usually made of high tinsel steel and don't drill easily. Share this post Link to post Share on other sites
specialwheelhorse 174 #6 Posted September 6, 2014 If all else fails find a shop in the area that has what I call a tap burner It will burn out anything no matter how hard that's why it's called a tap burner Used in the aircraft industry, not a fancy machine but takes all the Falderal out of the whole deal. I worked at united aircraft for ten years So I know this little machine saved them much money. Share this post Link to post Share on other sites
Irv 115 #7 Posted September 6, 2014 Thanks for your help guys. I'll try the tap, heat and wax method first and see what happens. Share this post Link to post Share on other sites
Irv 115 #8 Posted September 7, 2014 Tried the heat and wax, no luck. Are we sure that it is threaded in? On the other stud, I can see that the treads for the bolt to hold the muffler on stop about 1/8 " from the block. Share this post Link to post Share on other sites
Racinbob 10,871 #9 Posted September 7, 2014 Yes, it's threaded in per the parts manual for that motor. Share this post Link to post Share on other sites
Irv 115 #10 Posted September 7, 2014 You're right Racin, just looked it up myself. thanks Share this post Link to post Share on other sites
Racinbob 10,871 #11 Posted September 7, 2014 You bet Irv. Good luck getting that thing out of there. I don't have any ideas better than what's been mentioned already. Share this post Link to post Share on other sites
Wayne 28 #12 Posted September 7, 2014 do you have access to a oxy acetyline torch? heating it might make it release... just don't go melting anyting Share this post Link to post Share on other sites
km3h 543 #13 Posted September 8, 2014 I bet you would be surprised at how cheaply you could get that fixed at a local machine shop. Another Idea would be to weld a bolt to it and then cut the head off. Then you just put a nut on it and be done. Share this post Link to post Share on other sites