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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 05-24-2009, 10:56 PM   #1
pcorbell
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Join Date: Mar 2009
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Broken Bleeder Valve

Used my Motive Pressure Bleeder to bleed the fluid from my brakes the other day. No problems until I came to the front passenger side caliper. The bleeder valve was broken off, including the nut.

Anyone have any idea on how to get it out?

Last edited by pcorbell; 05-24-2009 at 11:02 PM.
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Old 05-25-2009, 01:11 AM   #2
Steve@ASPTuning
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Only way... to drill it out.

Or if you can get like a small flat head you can stick it in there and try to unscrew what's left of it.

Then replacements you can get at your dealership, part source or something their called replacement nipples or something like that.

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Old 06-03-2009, 04:52 PM   #3
surenp53
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Use an easy out
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Old 06-04-2009, 11:22 PM   #4
bearing01
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I've had no success getting bleeder screws out with an ez-out. If the bleed screw was seized then likely an ez-out will break before you get the un-seized twisted off screw out. The only chance you will have is to completely remove the caliper. Heat up really hot the caliper and then dunk it in cold water. Do this a few times. The different metal (steel screw -vs- cast iron or aluminum caliper) will expand differently and that could break the rust seal when you shock the metal between hot and cold.

You will also likely fail by drilling it out. The threaded hole in the caliper is tapered on the bottom. If you have to drill through the old screw then you will likely drill away the tapered hole in the caliper. The new bleed screw will leak.

I would just loosen the caliper brake line and try to bleed the line that way. Just keep pumping fluid through the line and caliper, letting it run out on the floor. Do this until you get clean fluid coming out. If this doesn't work then resort to removing the caliper and trying to fix the broken screw.

Just be careful heating up aluminum (if the caliper is aluminum. I can't remember if it is). Aluminum has a lower melting temperature than iron and won't necessarily glow red hot like iron will.
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Old 06-08-2009, 04:55 PM   #5
Spyder_Venom
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Quote:
Originally Posted by bearing01 View Post
The only chance you will have is to completely remove the caliper. Heat up really hot the caliper and then dunk it in cold water. Do this a few times. The different metal (steel screw -vs- cast iron or aluminum caliper) will expand differently and that could break the rust seal when you shock the metal between hot and cold.
All you're going to do is temper the hell out of the caliper (and destroy the seals around the caliper pistons and intoduce contaminates into the inside of the caliper). Better just to use a heat wrench and try and use an EZ out with the heat wrench applied. The idea is to expand the metal around the broken bolt, then try to unscrew it.

Last edited by Spyder_Venom; 06-09-2009 at 09:02 AM.
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Old 07-11-2013, 01:02 PM   #6
tonyisok
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I just had this happen to me...over tightened screw and it broke off flush with the caliper surface. Went to Oriely's and bought #2 extractor tool...use vice grips to turn extractor counter-clockwise while tapping it lightly with a hammer and was able to retreieve the screw...happy ending
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