Driveplate bolts rounded off...

[jabinya]

I'm in the process of replacing my leaky rear main oil seal and found that whoever accessed the driveplate bolts last (not me), had rounded some of them off. Looks like they used a impact wrench. I manged to get all but two off.

Those two are so bad I have to find another way to remove them. The only way I can think of is to use a cut off wheel to chop off the heads and remove the rest of the bolt.

In the center of each bolt is a dimple, possibly used as a guide to drilling them out and using a bolt extractor? With 98 FT/LBS of torque I would think that wouldn't be the right way to go. I've broken off extractors with less amounts of torque and drilling thru them is next to impossible. Maybe I'm wrong? Any other ideas?

Arrgh! I'm so frustrated right now! I should have replaced this seal back when I had the engine out of the car.

Anyway the part # for the driveplate bolt I found is MD752272. Is this correct?

 

[92awddsm]

Use and angle grinder and grind the heads off. Once you grind them off, all tension and torque will be removed from the bolt. If no loctite was applied, the should spin out by hand. If they do have loctite on them, you should still be able to remove them easily with a pair of vice grips and a propane torch.

Sorry, I dont know the part # for the bolts.

 

[beating4g63s]

get that gator grip socket it works hella good it's taken alot of rounded off bolts, or you can go to sears I think they sell a socket set for rounded sockets, but the gator grip works best for me, if it doesn't work just grind down one side so it can grip it.

 

[jabinya]

Well, I went up to Sears Hardware and found some Bolt-out sockets. It looks like they cut into the damaged bolt providing a secure grip. You can fit a wrench or socket on the end or use a 1/2 drive.


**EDIT**

Wow. These things are awesome. I got the two bolts out in less than 10 minutes.

 

[93 GSX TURBO]

Ive got the same problem but worst. The dam crankshaft and bolts got beat up so I had to take a chissle and even out the crankshaft just so I could use a socket on them. Now the 17 wont go becaus they are to rounded off. What are the bolt extractors you bought called or part number? Thanks

 

[Dorifto]

Get a welder, and a nut. Weld the nut to the rounded bolt. Use a socket for the nut. Torques it right out. Sometimes have to weld it again, the weld breaks sometimes.

 

[jabinya]

Here is a link to the exact set I bought. I found them at my local Sears hardware store.
This type of tool is available from other manufacters. These worked fine for me. I highly recommend these tools

BOLT OUT SOCKETS

Oh, if you guys need it, the Mitsubishi part # for the drive plate bolts on 7bolt motors is MD752272. They were 3.51 per bolt, and they only order them in bags of five. WTF What a nice way to squeeze more money out of our pockets. Mistu should either sell them individually or put seven bolts to bag. Anyway I bought two bags of five, so I have two extra.