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Originally posted by Kremithefrog:
Never seen, heard, or have open the bleeders to change brake pads. It doesn't hurt a thing. What kinda story do you need?
It is a good idea to open the bleed port when compressing the piston on the front brakes on a Contour so that you don't push crud backward in the brake system.
That does not apply to the rear brakes. The rear piston is not puched badk into the caliper, instead, part of the piston collapses from being screwed in. You are not pushing the piston into the caliper so there will be no fluid to displace.
Jim Johnson
98 SVT
03 Escape Limited
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It a real must on ABS systems. So you don't push crud into the ABS motor, which will kill it (in time). Some of the cars rear disc brake cals, need to have the piston not only turning but being pushed in at the sametime(with force) something that is hard by hand unless you work out. Autozone rents a really cool tool for this.
Alot of crud builds up at the calipers/wheel cylinders, its even a good idea to flush your brake fluid system (bleeding and adding fluid till it's almost clean, again better for ABS systems) has a huge impact on brake component life. And brake fluid does break down after time.
But all in all opening the bleeder is more a precaution, why skip a precaution?
Last edited by jd28; 05/27/06 01:07 PM.
JD a.k.a Fingers
"Don't Panic"
'98 Contour GL 2.0L VCT ATX 88k
'98 Contour LX 2.5L MTX 120k
Street racing can kill
just less of a chance with a 2.0
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Thanks for the correction. I don't suppose you have a cutaway picture of that, do you?
'98 SVT Red/midnight blue - a few mods
E0 wheels for sale - PM me
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I have no life
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I have no life
Joined: May 2002
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If the only way crud gets back up in the system is from changing the front brakes with the bleeders closed, then how does the brake fluid get dirty in the master cylinder before pads are changed?
Seems like just changing the pads and bleeding till clean/flushing will work fine.
98.5 SVT
91 Escort GT (almost sold)
96 ATX Zetec (i brake to watch you swerve)
FS: SVT rear sway bar
WTB: Very cheap beater
CEG Dragon Run - October 13-15
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Joined: Sep 2000
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Hard-core CEG'er
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Hard-core CEG'er
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Originally posted by Kremithefrog:
If the only way crud gets back up in the system is from changing the front brakes with the bleeders closed, then how does the brake fluid get dirty in the master cylinder before pads are changed?
Seems like just changing the pads and bleeding till clean/flushing will work fine.
Who said that's the only way crud gets back to the master? I didn't. The point is that if you have fluid with debris in it, and you can if it is old, then you risk getting the crud between the bore and the piston cup in the master causing master cylinder failure. You also risk getting debris into the ABS unit.
It's your car. Treat it how you want. I'll take a moment and open the bleed port so fluid is not pushed backward.
Jim Johnson
98 SVT
03 Escape Limited
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I've always opened the bleeders when compressing the caliper pistons, even on cars without ABS. I never gave it much thought until this post. Started doing it that way on old Fords to avoid pushing brake fluid out the master cylinder and onto the engine.
I do a complete flush/bleeding of the entire system anyway whenever I change any brake component (even pads). I have simple tools that make bleeding very easy ââ?¬â?? The most useful is a siphon fixture that screws onto a quart of brake fluid and keeps the master cylinder reservoir filled (brake fluid bottle is placed upside down on the master cylinder reservoir).
If you just want to change pads without having to bleed the system, then don�t mess with the bleeder fittings.
It's interesting that screwing the rear caliper pistons in does not displace any fluid - I didn't know that.
99 Tropic Green SVT, Tan Leather, 20K miles, "Nice Twin" (factory stock).
99 Tropic Green SVT, Tan Leather, 28K miles, "Evil Twin" (Turbo AER 3L and more in progress)
96 Red LX, Opal Grey Leather 2.5L, ATX, 22K miles
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I also have a '95
sometimes when i replace pads and give some force to the piston the fluid over flows out of the reservoir.
I use the needle nose tecnique too. It works well - JOE
I do not open the bleeder.
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