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Jaf
Joined: 08 Jun 2006
Posts: 194
Location: Oria. Spain
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 Posted: Sun Jul 23, 2006 9:31 pm Post subject: Help with bleeding brakes (caliper bleed screw knackered) |
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Hi,
Had to replace one of the front to back brake lines. What a pig bending it to shape! Anyways, I bled the rear brakes and one of the fronts and predictably the last front brake bleed screw is rounded off. I tried wedging the brake pedal down overnight to bleed the air out but that hasn't worked. Is there any other thing I could try before resorting to taking the caliper off?
Thanks,
Jaf
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1978 924na |
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tux
Joined: 02 Jul 2006
Posts: 133
Location: Nottingham UK
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| Posted: Mon Jul 24, 2006 2:15 am Post subject: |
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Have you tried mole grips (vise grips)?
Failing that, it is sometimes possible to bleed the caliper through the flexi-hose union. Loosen the flexi hose where it meets the caliper and try the bleeding process using this to dispel the air/fluid. But don't hold your breath! Its difficult at the best of times.
Best of luck!
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Pete
Merlin Guards Red 1985 N/A |
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Jaf
Joined: 08 Jun 2006
Posts: 194
Location: Oria. Spain
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| Posted: Mon Jul 24, 2006 3:17 am Post subject: |
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| tux wrote: | Have you tried mole grips (vise grips)?
Failing that, it is sometimes possible to bleed the caliper through the flexi-hose union. Loosen the flexi hose where it meets the caliper and try the bleeding process using this to dispel the air/fluid. But don't hold your breath! Its difficult at the best of times.
Best of luck! |
Thanks Pete. I can't get the mole grips on tight enough. Grumble. They just scratch more metal off. I wondered about doing it through the flexi hose but sounds like a nightmare then! It's the last thing to do before taking her to the MOT station. My dad's coming round in the next couple of days so it'll be dad to the rescue again with his proper muscles (hopefully!).
Thanks,
Jaf
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1978 924na |
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tux
Joined: 02 Jul 2006
Posts: 133
Location: Nottingham UK
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| Posted: Mon Jul 24, 2006 4:08 am Post subject: |
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The only other thing to try is an "easy out" or stud/screw extractor. Of course this could be considered dodgy with the caliper in place. Its a sort of last resort I guess before going the drilling and retapping route.
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Pete
Merlin Guards Red 1985 N/A |
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Ozzie
Joined: 12 Mar 2005
Posts: 4448
Location: Townsville, Qld. Australia
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| Posted: Mon Jul 24, 2006 7:55 am Post subject: |
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I tried to do my brakes and all the bleed screws were rounded/seized tight.
I had a 50/50 success with a pair of plumbers grips/stilsens/monkey wrench- (different names for the same thing in different countries)
2 broke off.
no success with ezi outs
I ended up with replacing one caliper and one rear cylinder.
Hope you have better luck. If any of yours are rounded but can be undone, replace them now, only a couple of dollars each.
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Porsche 924 1984 (UK import) NA
Its AUTO and its BLACK
Montego Black on black/red
Engineer of Electro/Mechanical Systems Maintenance |
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CBass
Joined: 03 Nov 2002
Posts: 2807
Location: Vancouver, Canada
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| Posted: Mon Jul 24, 2006 9:16 am Post subject: |
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Torch and hammer. Use a propane torch to heat it up, give it a few lumps with a hammer and then try the vise grips. Failing that a welder works wonders here.
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'81 931 in various states of assembly |
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Jaf
Joined: 08 Jun 2006
Posts: 194
Location: Oria. Spain
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| Posted: Tue Jul 25, 2006 7:28 am Post subject: |
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| Ozzie wrote: | I tried to do my brakes and all the bleed screws were rounded/seized tight.
I had a 50/50 success with a pair of plumbers grips/stilsens/monkey wrench- (different names for the same thing in different countries)
2 broke off.
no success with ezi outs
I ended up with replacing one caliper and one rear cylinder.
Hope you have better luck. If any of yours are rounded but can be undone, replace them now, only a couple of dollars each. |
Ouch! That's really bad luck Ozzie. My dad came round today and he got it off with a pair of faithful grips he's had for 15 years. They really look like they couldn't fight their way out of a paper bag but they worked wonders. Hurrah! Got a new screw and the brakes are bleed and she's ready to go. Can't wait! A few checks in the morning and then off to the MOT.
Jaf
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1978 924na |
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Jaf
Joined: 08 Jun 2006
Posts: 194
Location: Oria. Spain
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| Posted: Tue Jul 25, 2006 7:30 am Post subject: |
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| CBass wrote: | | Torch and hammer. Use a propane torch to heat it up, give it a few lumps with a hammer and then try the vise grips. Failing that a welder works wonders here. |
Eek!  Watch me catch the car on fire! Need a far steadier hand than mine. Amazing that a 7mm can be so tight. Anyway, my dad managed to get it off for me.
Thanks,
Jaf
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tux
Joined: 02 Jul 2006
Posts: 133
Location: Nottingham UK
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| Posted: Tue Jul 25, 2006 7:35 am Post subject: |
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Best of luck with the MOT.
I'll keep my fingers crossed on both hands as seanski has his 924 booked in for an MOT tomorrow too!
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Pete
Merlin Guards Red 1985 N/A |
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