Page 1 of 1

Rounded allen key bolt :(

Posted: Wed Apr 07, 2010 7:41 pm
by eefy
was atempting to change my brakes pads and discs when i rounded an emovable bolt that hold the carrier on (the lower one) an advice on how to get the thing out?

already tried knocking in a choice set of bits to try and get some presence on it with no avail :(

any advice or any tool that will help

cheers

Heath

Re: Rounded allen key bolt :(

Posted: Wed Apr 07, 2010 9:39 pm
by the edmundator
I bought new bolts from the dealer, and the rubber/plastic sleeves that go round the bolt.

The easy way to then get the old bolt out, is to cut round the rubber/plastic sleeves with a Stanley knife. This exposes the end of the bolt and a tight grip with some mole-grips will have it out. Getting the new sleeves into the caliper was a bit of a sod, but I managed it in the end. Then plenty of copper grease on the new bolt to stop it corroding.

Re: Rounded allen key bolt :(

Posted: Wed Apr 07, 2010 9:41 pm
by Risocco
The one that hols the caliper to the carrier?

I've has success by cutting the rubber thing off and grabbing the bolt head with mole grips. Penetrating fluid will help too mate :vcool:

Alex

Re: Rounded allen key bolt :(

Posted: Wed Apr 07, 2010 11:14 pm
by eefy
thanks for the advice, just ordered a screw extrater which i hope will work, if not i'll get some mole grips and order in the rubber bush etc :)

Re: Rounded allen key bolt :(

Posted: Thu Apr 08, 2010 3:26 pm
by Nate
bit late this time, but for future reference: the main reason these bolts round off is that the head is stuffed up with dirt. scrape them out clean and tap the allen bit in with a hammer before trying to undo them. i've always managed to get them out if they've been rounded by hammering in a spline or torx bit that is slightly too large.