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Bruce C
Novice
Apr 22, 2011, 5:38 PM
Post #1 of 6
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seized bleeder valve
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After replacing a brake line on my 1993 Ford F-150, I found the left rear wheel brake bleeder valve seized. I have applied heat around the thread while applying pressure. Nothing. I have disassembled the brake parts, including the bolts for the brake cylinder (which doesn't budge), hoping to attack the seized thread from behind.
This is a farm truck, that hasn't seen a paved road in years, and won't get any outside-repair funding again.
I suspect if I apply too much heat, it might ruin any seals on the cylinder. Correct?
Can I remove the cylinder? My Haynes Manual doesn't give any instructions for the cylinder.
Is the valve replaceable?
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Hammer Time
Ultimate Carjunky
/ Moderator
Apr 22, 2011, 5:45 PM
Post #2 of 6
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Re: seized bleeder valve
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Any heat at all applied to that housing is too much. It will ruin the inside seal. If the bleeder is that frozen, then you looking at a new caliper. As far as the mounting bolt being frozen, you can apply heat to the area around the threads, provided there is no rubber in the area that has to be re-used. You always want to heat the area around the bolt and not the bolt itself. That will expand the metal away from the threads. it needs to get red to do any good so a propane torch isn't going to cut it. You need a hotter, more concentrated heat that will heat it quickly without the heat traveling to the bolt.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Bruce C
Novice
Apr 22, 2011, 5:59 PM
Post #3 of 6
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Re: seized bleeder valve
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The applied heat was with a hand propane torch, and around the thread. And, as the garage was just above freezing, probably a fools' errand.
The 2 mounting bolts came right off, but the cylinder doesn't budge. And, brake shoes, no caliper. At least, I don't think the mounting plate is called a caliper.
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Hammer Time
Ultimate Carjunky
/ Moderator
Apr 22, 2011, 6:01 PM
Post #4 of 6
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Re: seized bleeder valve
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The part the bleeder goes in is the caliper and that is going to have to be replaced. It should get both sides.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Bruce C
Novice
Apr 22, 2011, 6:27 PM
Post #5 of 6
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Re: seized bleeder valve
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I found the Haynes instruction (pages stuck together) on cylinder removal. The exploded view shows the bleeder screw mounting directly onto the cylinder, not the backing plate, so tomorrow I can bench the cylinder.
Thank You for your prompt attention, Hammer Time!
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Hammer Time
Ultimate Carjunky
/ Moderator
Apr 22, 2011, 6:30 PM
Post #6 of 6
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Re: seized bleeder valve
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Once you have applied heat to that caliper, don't try to re-use it.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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