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Broken Stud On Rear Main Seal...

stricnynel0s
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stricnynel0s Collaborator

stricnynel0s

Posted
Posted

Ok today was suposed to be a good day, i got all my parts i was missing and i started cranking on the motor nice and early, but about an hour into it while torqueing one of the bolts to the rear main seal it snaps effortlessly. ok no big dead i have extracted tons of bolts, so i drill it out perfectly center and procede to use my extractor which than snaps in the bolt which is inside the block. i tried almost every bit known to man and nothing grabs it,, i bought a super expensive industrial bolt out but i cannot not drill into the old bolt out. the snap is flush with the block so i cannot try to grip it and take it out. my ONLY option is to drill and extract. does anyone know a good drill bit that i can use to get this out. i am soo f***ing mad i thought i was gunna slam motor on the hood of the chassis in a fit of rage. has this happened to anyone else ? i know better than to ask this, but has anyone else only used 5 of the 6 bolts that hold the seal in place. I am pretty sure only using 5 bolts would not be too bad. i looked at it and it dosent hold see any physical stress, and its rtv sealed. any input. after i messed around with it, i am sure it can onlybe extracted by a machine shop....

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https://www.sau.com.au/forums/topic/310574-broken-stud-on-rear-main-seal/
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Duncan Grand Master

Duncan

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Posted

good work breaking that one! I've seen plenty of main rear seal bolts stripped but normally the ones from the sump where they thread into the alloy rear seal housing. Anyway I'd probably leave it, if it leaks like a bastard some how (unlikely) you can always take the flywheel off and get to it in the car

I guess you weren't using a torque wrench...these are only m6 bolts right?

tridentt150v Grand Master

tridentt150v

Posted
Posted

USA - do you have spark erosion guys over there? They seem to be able to get the impossible studs out..............not sure about ezi outs though, they are tough metal?

Otherwise a Dremel with some tungsten bits and be prepared to break a few, it won't be easy thats for sure.

MBS206 Grand Master

MBS206

Posted
Posted

Carbon tipped drill piece for drilling stainless, BUT you HAVE to drill freaking slowly (Like slowest speed possible!) or you will munt the drill bit.

Carbon tipped drill pieces are used on stainless and other very hard metals.

aerofocker Enthusiast

aerofocker

Posted
Posted

high speed dentst drill and a carbide bit or hers one for you weld a nut the same diameter as the origonal bolt head onto the shank,the nut will almost shutter the weld pool so it doesent contact the rest of the casting,ive done this many times before

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