Drilling a bolt out

[t121anf]

anyone offer some advice on this.

mate has a car engine with a snapped engine bolt which needs to be removed so he can refit the engine.

the bolt is in an easy position to drill out but wont come out using an easy out, it even has one snapped in it.

what advice can you offer?

this a pic of said bolt
https://i26.photobucket.com/albums/c138/pugboy360/013.jpg

[t121anf]

not sure tbh, good call on the left hand drill bits will tell him

[MaybeGuy]

good luck drilling it with an easy out stuck in it. they're useless unless its on an already loose bolt.

heat it. its got loctite on it.
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Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!!
Kickstart wrote: Hi I tend to agree with Matt. All the best Keith

[doggone]

If you can get a drill in it, sometimes you can whack in an old screwdriver of random chunk of metal.
The vibrations and heating will have helped loosen it hopefully.
If you can heat it with blowtorch or something that will help too.
If that won't work as above bigger drills until something gives way and you can wangle out the remains.

[stirlinggaz]

cobalt drills ftw!
best investment i have made in a while.
got a load of de-walt 2,3 & 5mm cobalt bits for a tenner.
i'd tried hss & failed.
tried titanium & again failed.
then snapped one of those bloody useless extractors, it got a couple of mm in & snapped! leaving the tip embedded in the bolt.
cobalt drill cut through it like butter.(just do it very slowly & use something to keep it cool, i just used freezer spray/lube as it was all i had)
worked my way through the different sizes of drills & then used my tap & die set to cut new threads. (i knew i would find a use for the tap n die set i bought years ago,lol)
felt quite pleased with myself.
cheers,
GAZ

[t121anf]

cheers guys, he has a link to this thread so i'm hoping he's reading it

[stirlinggaz]

im just about to do the same thing, coincidence?
my mate has sheared off the top of a bolt, that holds the exhaust manifold on.
the stub is flush with the cylinder.
i've had to strip the bloody thing down, drain the coolant, remove the radiator etc, just because of his cack handedness.
wish me luck,
now where did i leave those coabalt drills........
cheers,
GAZ

[Walloper]

Hardest bit next to a Diamond tip is the Carbide Plates welded into masonry bits.

Grind a cutting edge onto the tip and Hey Presto... You can drill through anything.

They are not proper twist drills as they do not have much of guide from the sides due to the extra clearances for masonry so accuracy is not perfect but with a bit of care they will beat any cobalt bit.

Lots of coolant.
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W-ireless A-rtificial L-ifeform L-imited to O-bservation P-eacekeeping and E-fficient R-epair

[MarkJ]

Cut a slot into it and use an impact driver with a flat head tip?

[t121anf]

[stirlinggaz]

pfffftttt,
cobalt drill. 3mm. went straight through the 4 inch bolt stub.
slow speed drill & a bit of coolant.
just to tap some new threads now.
imo, cobalt is hard enough for steel (D200 for stainless steel)
though if you snap a cobalt bit, next logical step up is a carbide bit.
never had to use one yet. (touch wood)
cheers,
GAZ

[Ed Case]

The only place for "Easyouts" is in the dustbin, the damn' things make a difficult problem into a nearly impossible one. Get shot of 'em.

[Pete.]

Ifit's got a broken easy-out stuck in it you'll have to use a carbide drill to make a hole.

Looks like it has a small amount protruding. If it has, what I would do is take the next size nut, a normal mild steel one, and put that over the broken bit then give it a good squirt with a mig welder. You should be able to remove it then.
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a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[Raffles]

Whilst perusing the forum last night I came across this thread and decided to have a little read.
I have previously tried to drill out broken studs on many occasions with varying degrees of success ranging from dismal failure to outright disaster! I have always used HSS drill bits and was not aware of cobalt drill bits untill reading stirlingaz's post.
Today I snapped a bolt whilst removing the stator plate on my Sherco. I went out and purchased some suitably sized cobalt drill bits and the resulting outcome was an outstanding success. Cobalt drill bits and stirlingaz FTW
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A good loser will always be a loser.