broken rear motor mount stud help!!!

2fast4u

New Member
Joined
Apr 17, 2008
Messages
11
idk but somehow i managed to brake the rear motor mount stud clean off wat i need to no is how am i guna get the rest of the stud out of the engine any ideas
 


T

turkeyssr

Guest
The only thing I can think of is drill it out and use a heli coil. I really have not had much success with 'easy outs' or similar methods to get those things out. You can try those first, but be prepared to use the helicoil.

--John
 

azbill

Active Member
Joined
Dec 15, 2006
Messages
3,697
take a dremel and cut a slot in the stud
back it out with a screwdriver
I have done this a few times successfully
 

KiDD

Member
Joined
Feb 19, 2008
Messages
268
More Sad Times

I was just riding home then heard this horrible metal on metal slapping sound. I get off and check the bike over and the rear left motor mount broke below the surface of the engine.... I read http://www.secondchancegarage.com/public/671.cfm and http://www.madelectrical.com/workshop/broken-bolts.shtml

I don't have a drill... but I do live next to a lot of auto shops. Do you think the welding a bit to the bolt and unscrewing it that way would hurt the aluminum?



P.S. Why does oil leak out through the motor mount holes?
 
Last edited:

sparky

Active Member
Joined
Mar 19, 2008
Messages
1,429
I haven't been here so much, because my gearbox was messed up, so i had to ship it back & get another one.

The day I got the gearbox, I went for a 15 mile ride away from home since I hadn't ridden in almost 3 weeks. On the ride home, the stud didn't break.... but the "female" part of the mount - where the stud fits into - broke!! I don't have a Sad Time engine, so it might sound a little weird to you. Anyway, I have no choice but to buy an entirely new engine & gearbox for $120, since the part of the block that broke is gonna cost me $50+ itself. And I'm tired of shipping parts there, waiting, & waiting some more.

I had definitely tightened the bolts & had never had problems within 20 miles worth of riding, but with this new engine... I'm honestly going to be taking my own advice - replacing all bolts with Grade 8 bolts, replacing all gaskets, & putting blue Loc-Tite EVERYWHERE!! That prolly won't help you out, KiDD, but hopefully it will help someone out.
 

KiDD

Member
Joined
Feb 19, 2008
Messages
268
Well I called the local racing engine machine shop (which is just around the corner from me) and they said it would take about a half hour and cost me 25ish dollars. I borrowed a drill from work and will buy some small EZ outs tomorrow. I didn't loctite these studs in so I hope they will come out easy. Always try the cheapest option first. If that doesn't work I will go to the muffler/welding shop next door to my apartment and try the "tack a bit on and unscrew it with that" trick. I'm just afraid of damaging the threads, I don't want to have to buy a tap or helicoil it.
 

fastboy9

Member
Joined
Jan 22, 2008
Messages
585
I just finished sorting this problem out. I didn't have a dremel to cut a notch in the end of the bolt, and couldnt get it out with a centre punch. So I drilled the bolt out, next I filled the whole with a really hard epoxy (same as JB Weld in USA) then tapped an M6 thread into the epoxy and this time put much stronger bolts into the rear mount. I wish I did this before I even mounted my engine, would have saved so much time. I brought the tap set off of eBay for a fiver and the epoxy I already had.
Fastboy
 
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