Boxster - sheared bolt stuck in wheel hub carrier - help?

[delays]

Today I've been replacing the disks and pads on the front of my '99 Boxster. However, on one side, I've run into a slight issue and would like some help at coming up with a solution.

There's a small M6x16 bolt which fixes the brake pipe carrier bracket (which feeds the caliper and fixes the straight, inflexible brake pipe at the point where it turns into a flexible brake pipe) to the aluminium wheel hub carrier. It showed no sign of being overly corroded, however, with a little pressure, the head came loose from the stem and left me unable to remove it, or indeed reattach the pipe carrier.

I tried drilling the bolt to allow me to screw in something to loosen it; but despite drilling away for a good while, I've barely made a dent in the bolt. I doubt my drill bits are strong enough.

I've pieced the car back together and the carrier isn't too loose, so I can still drive the thing - so all is not lost. But in the interests of making sure everything is securely bolted together, how do I get the stem out of the hub carrier?

[DuraAce]

Drill it out and put a helicoil in.

[tr7v8]

Get some cobalt drills, decent ones. Dremel the shank flat & square & centre pop the bolt in the middle. Use cobalt drill & then carefully retap.

[andyiley]

As above, good sharp new drill bits, start small on a filed/ground flat end, take your time & it will work.

[eltax91]

Is there enough poking out to get some of those gripper removers on to?

[PositronicRay]

andyiley said:

As above, good sharp new drill bits, start small on a filed/ground flat end, take your time & it will work.

I followed this advice, it works. Use some lube I used WD 40 on the drill and some lard (yes really) on the tap.

[andyiley]

PositronicRay said:

andyiley said:

As above, good sharp new drill bits, start small on a filed/ground flat end, take your time & it will work.

I followed this advice, it works. Use some lube I used WD 40 on the drill and some lard (yes really) on the tap.

Lard will do just fine, all the threading lubricant does is to cool the tip of the tool instantly by melting when it gets hot, just keep putting more on as it melts to be sure.

[delays]

Thanks for the advice gents, will give the cobalt drill bits a shot.