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Removing frozen brake bleed screws

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slughammer

01-09-2002 08:57:27




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It's time to put new brake pads on the car and I would like to bleed the calipers to complete the job. I've managed to twist off the hex and nipple portion of the bleed screws and I'm looking for some suggestions on where to go from here. Drilling, welding, heating? Anyone out there with some success in getting these things out? I tried welding and then drilling on one once; when I was done I went and bought another caliper. I'll not be beaten this time! Please Help - Slughammer

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slughammer

01-16-2002 08:59:08




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 Re: removing frozen brake bleed screws in reply to slughammer, 01-09-2002 08:57:27  
Tried to get those bleaders out this past weekend; I ended up losing 1 and winning 1. I started by using the air compressor to blow the pistons out of the calipers; I then removed the seals to prevent damage to them. The one I lost I drilled up in 64th increments and tried (2) different size easy outs (the square type); did not manage to get the threads out. I would have used a tap to try and get the threads out but the thing seemed to be a metric size. On the second one I heated the screw and let it cool; then I broke the smaller size easyout in the hole. I then gas welded the head of a 5/16 bolt to the portion of the screw that was sticking out and I was able to turn the bleader screw out. Next time I'll try the suggestion to quench the screw after heating. Thank you all for the responses! Slughammer

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Andrew

01-12-2002 16:06:54




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 Re: removing frozen brake bleed screws in reply to slughammer, 01-09-2002 08:57:27  
The way that I have the best luck removing brake bleeders and other frozen bolts is to heat up the bolt or bleeder itself until its white hot and put water on it immediately after heating.I use a bottle with a 1/4" hole in cover and a length of 1/4" tubing that reaches to bottom of bottle.Just squeeze the bottle and its puts the water directly on heated parts.Works nearly everytime for me.



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Trucker

01-12-2002 02:12:08




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 Re: removing frozen brake bleed screws in reply to slughammer, 01-09-2002 08:57:27  
This is one of those things you need to use a good easy out on.The other ideas were all good too,but those square looking easy outs will do the job if you drill it out to where you can get about the next to the smallest one that comes in a package of 4 or 5.Hammer it in good and if it feels like it might slip beat on it some more,most likely as you are turning it and it should come out.I think those easy outs are made by Lisle and cost 15 or 20 dollars.Its real important not to let it slip if you can keep from it.

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Bus Driver

01-10-2002 17:25:52




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 Re: removing frozen brake bleed screws in reply to slughammer, 01-09-2002 08:57:27  
Saw an ad, maybe in latest issue of Hot Rod magazine, for attachment for air hammer to vibrate the screws before attempting to turn them. About $60.00, so would have to be planning several uses to justify purchase.



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slughammer

01-10-2002 14:45:29




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 Re: removing frozen brake bleed screws in reply to slughammer, 01-09-2002 08:57:27  
Thanks for the suggestions; I checked out prices on rebuilt calipers and they are a lot cheaper than I expected ($12.99 each)! I am going to try to get the nipples out; but I'll have the rebuilt calipers sitting there when I do it. Going to give myself one hour to fix them and see what comes out. Not that I'm the cheapest person around but I'd rather practice on a cheap caliper than one that cost a bunch. Experience also has its value. Thanks Again - Slughammer

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Chicken George

01-10-2002 06:40:48




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 Re: removing frozen brake bleed screws in reply to slughammer, 01-09-2002 08:57:27  
Slug. I know its too late now, But there WILL be a next time, I find if I put a box wrench on the bleeder and try to turn it loose, than whack the bleeder on the outlet end with a stout hammer as I'm trying to turn it,it will 90% of the time, loosen up! I have drilled out broken ones and used ez outs with success also. Heating usually wrecks the inner piston/seals. Luck, Geo.



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Russ

01-11-2002 04:02:14




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 Re: Re: removing frozen brake bleed screws in reply to Chicken George, 01-10-2002 06:40:48  
A couple of days before hand, wet them down with PB Blaster if possible, then the torch carefully applied to the bleeder itself if it`s still frozen. I Know, the torch on the bleeder screw is bass ackwards, but it works and you don`t ruin the seals putting all that heat into the body of the caliper. I use 4" vise grips to remove the screw, and generally consider them throw-aways when I have to resort to the torch, although I have on occassion been forced to reuse them. I`ve done quite a few like this and haven`t ruined a seal or piston yet. Russ

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Doc

01-09-2002 21:31:36




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 Re: removing frozen brake bleed screws in reply to slughammer, 01-09-2002 08:57:27  
There are repair kits available for the bleeder screws, but by the time you disassemble the caliper, get the kits for the caliper and bleeder, you may be able to get reman. calipers for the same or near money depending on the application. Price both ways and see what happens. Doc



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Nathan(GA)

01-09-2002 19:07:49




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 Re: removing frozen brake bleed screws in reply to slughammer, 01-09-2002 08:57:27  
I've gotten some out with easouts.

If the calipers are very old, get some rebuilt ones. They are bad about freezing up.

Next time try a c-clamp to push the pistons back in enough for the new pads. Good Luck!



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Jim WI

01-09-2002 10:16:40




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 Re: removing frozen brake bleed screws in reply to slughammer, 01-09-2002 08:57:27  
Last time I was buying parts I noticed some brake bleeder repair kits. I'd hope the box had some tips on removing the broken parts left in the caliper.

I've never had to do this before (I've only broken the ones on drum brakes and wheel cylinders are generally pretty cheap).

I'd probably try something like an easy-out first. After that I'd try drilling them out so that all that's left is the threads and then peel those out.

Doesn't sound real fun though -- how much are the calipers anyway?

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