Bleeding the Brakes

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User1

RETIRED Admin, pm OFF
<TABLE cellSpacing=1 cellPadding=6 width="100%" border=0><TBODY><TR><TD colSpan=2><TABLE width="100%" border=0><TBODY><TR><TD style="PADDING-TOP: 4px" vAlign=top colSpan=2>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]Bleeding the Brakes<!-- google_ad_section_end -->

[/FONT][FONT=Trebuchet MS, Verdana, Tahoma, Arial]July 18 2000 at 8:48 PM[FONT=Trebuchet MS, Verdana, Tahoma, Arial][/FONT][/FONT]</TD><TD vAlign=top align=right>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]Mario [/FONT]</TD></TR><TR><TD vAlign=bottom colSpan=3><HR></TD></TR><TR><TD colSpan=3>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]<!-- google_ad_section_start -->I replaced the leaky master cylinder for my '76 X1/9 with a new one this weekend. After bleeding the brakes(with a vacuum pump) I went to test drive my car and found that the pedal went almost all the way to the floor before the brakes would catch. After my fifth try at bleeding my brakes with no improvement, I took my car to Midas and had them try to bleed the brakes. They gave up and gave me my car back.

Am I doing something wrong? I checked for leaks and there were none to be found. The brakes are spongy(they don't fade). Is there some trick to getting all the air out of the system? I have new calipers and brakes on all four wheels.

Thanks,

Mario.<!-- google_ad_section_end -->

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[FONT=Trebuchet MS, Verdana, Tahoma, Arial][/FONT]</TD><TD style="PADDING-LEFT: 15px" vAlign=top><TABLE cellSpacing=0 cellPadding=1 width="100%" border=0><TBODY><TR><TD align=left>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]<!-- google_ad_section_start -->try pressure instead of vacuum<!-- google_ad_section_end -->

[/FONT][FONT=Trebuchet MS, Verdana, Tahoma, Arial][/FONT]</TD><TD vAlign=top align=right>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]July 18 2000, 10:21 PM [/FONT]</TD></TR></TBODY></TABLE><TABLE cellSpacing=0 cellPadding=1 width="100%" border=0><TBODY><TR><TD style="PADDING-LEFT: 15px">
[FONT=Trebuchet MS, Verdana, Tahoma, Arial]<!-- google_ad_section_start -->I've always had good luck just pumping the brake pedal with the bleeders open (one at a time). I know some folks here have added a schrader type valve to the resevoir top and used compressed air to push the fluid through. I think the problem may be from trying to suck the air out of a system that was designed to handle pressure rather than vacuum. <!-- google_ad_section_end -->

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[/FONT]</TD></TR></TBODY></TABLE></TD></TR><TR><TD vAlign=top noWrap width="17.9%">[FONT=Trebuchet MS, Verdana, Tahoma, Arial]Jeff Z[/FONT]
[FONT=Trebuchet MS, Verdana, Tahoma, Arial][/FONT]</TD><TD style="PADDING-LEFT: 30px" vAlign=top><TABLE cellSpacing=0 cellPadding=1 width="100%" border=0><TBODY><TR><TD align=left>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]<!-- google_ad_section_start -->Steve A. what's your take on this? <nt><!-- google_ad_section_end -->

[/FONT][FONT=Trebuchet MS, Verdana, Tahoma, Arial][/FONT]</TD><TD vAlign=top align=right>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]July 18 2000, 11:04 PM [/FONT]</TD></TR></TBODY></TABLE><TABLE cellSpacing=0 cellPadding=1 width="100%" border=0><TBODY><TR><TD style="PADDING-LEFT: 30px">
[FONT=Trebuchet MS, Verdana, Tahoma, Arial]<!-- google_ad_section_start -->
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[/FONT]</TD></TR></TBODY></TABLE></TD></TR><TR><TD vAlign=top noWrap width="17.9%">[FONT=Trebuchet MS, Verdana, Tahoma, Arial]Tim[/FONT]
[FONT=Trebuchet MS, Verdana, Tahoma, Arial][/FONT]</TD><TD style="PADDING-LEFT: 45px" vAlign=top><TABLE cellSpacing=0 cellPadding=1 width="100%" border=0><TBODY><TR><TD align=left>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]<!-- google_ad_section_start -->Rear brake reservoir<!-- google_ad_section_end -->

[/FONT][FONT=Trebuchet MS, Verdana, Tahoma, Arial][/FONT]</TD><TD vAlign=top align=right>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]July 19 2000, 2:11 AM [/FONT]</TD></TR></TBODY></TABLE><TABLE cellSpacing=0 cellPadding=1 width="100%" border=0><TBODY><TR><TD style="PADDING-LEFT: 45px">
[FONT=Trebuchet MS, Verdana, Tahoma, Arial]<!-- google_ad_section_start -->when bleeding the rear brake's you have to watch the fluid level in the reservoir very closely, the reservoir for the rear brakes is separate from the front, the only way the rear reservoir is filled is via a tiny hole between the two reservoirs, this can take up to 3 minutes to fill the rear, by which time you could have easily emptied it and let air back into the system (I spent 4 hours before I found this out!) http://www.xone9.homestead.com/hydraulics.html
Good Luck<!-- google_ad_section_end -->

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[FONT=Trebuchet MS, Verdana, Tahoma, Arial][/FONT]</TD><TD style="PADDING-LEFT: 15px" vAlign=top><TABLE cellSpacing=0 cellPadding=1 width="100%" border=0><TBODY><TR><TD align=left>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]<!-- google_ad_section_start -->Couple of questions...<!-- google_ad_section_end -->

[/FONT][FONT=Trebuchet MS, Verdana, Tahoma, Arial][/FONT]</TD><TD vAlign=top align=right>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]July 19 2000, 7:23 AM [/FONT]</TD></TR></TBODY></TABLE><TABLE cellSpacing=0 cellPadding=1 width="100%" border=0><TBODY><TR><TD style="PADDING-LEFT: 15px">
[FONT=Trebuchet MS, Verdana, Tahoma, Arial]<!-- google_ad_section_start -->Hi Mario.. the system can be a bit tough to bleed, but a couple of questions first. You say it has new calipers. Were they replaced at the same time as the master cylinder or was the MC replaced later. If the MC was replaced later(and the brakes were fine before)then we can be sure the problem is air in the lines OR with the new MC. If the work was all done at once, then part of the problem may be that the caliper pistons have not been pressurised enough to bring them into contact with the pads. At the shop, I use an industrial strength vacuum bleeder, but have always had good luck using the two person method.
One thing to be aware of when installing the MC is that its easy to squish one or both inlet lines between the pedal hanger and the body. If the fluid can't easily get to the MC, it will be very difficult to bleed. A vacuum bleeder in this case will likely draw air around the MC seals if it can't draw in fresh fluid. I trust the MC was "new" not "rebuilt"? I suspect that you are having problems with one half of the braking circuit(F or R). If you bleed by foot and assistant, see if you are getting good fluid flow out of the bleeder. You will probably find the problem to be just one end. There have been many good posts here about low pressure bleeding with the aid of a bicycle tube valve fastened to the resevoir cap. Sounds like a good idea to me!
Just check the basics first, and don't over-pressurize! Good luck, and let us know what you find,
Steve<!-- google_ad_section_end -->

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[/FONT]</TD></TR></TBODY></TABLE></TD></TR><TR><TD vAlign=top noWrap width="17.9%">[FONT=Trebuchet MS, Verdana, Tahoma, Arial]Ulix[/FONT]
[FONT=Trebuchet MS, Verdana, Tahoma, Arial][/FONT]</TD><TD style="PADDING-LEFT: 30px" vAlign=top><TABLE cellSpacing=0 cellPadding=1 width="100%" border=0><TBODY><TR><TD align=left>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]<!-- google_ad_section_start -->Also...<!-- google_ad_section_end -->

[/FONT][FONT=Trebuchet MS, Verdana, Tahoma, Arial][/FONT]</TD><TD vAlign=top align=right>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]July 19 2000, 8:45 AM [/FONT]</TD></TR></TBODY></TABLE><TABLE cellSpacing=0 cellPadding=1 width="100%" border=0><TBODY><TR><TD style="PADDING-LEFT: 30px">
[FONT=Trebuchet MS, Verdana, Tahoma, Arial]<!-- google_ad_section_start -->Do not raise the rear of the car when bleeding the rear. On my first X, I could not get the rears bled until I finally figured out that the fluid didn't like going uphill.

In genereal, I recommend Speedbleeders to make the job easier.

Great advice above on making sure there is fluid coming out and keeping the reservoir topped up to insure fluid in the rear reservoir.

Persist and you will succeed.

Ulix<!-- google_ad_section_end -->

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[/FONT]</TD></TR></TBODY></TABLE></TD></TR><TR><TD vAlign=top noWrap width="17.9%">[FONT=Trebuchet MS, Verdana, Tahoma, Arial]scot[/FONT]
[FONT=Trebuchet MS, Verdana, Tahoma, Arial][/FONT]</TD><TD style="PADDING-LEFT: 45px" vAlign=top><TABLE cellSpacing=0 cellPadding=1 width="100%" border=0><TBODY><TR><TD align=left>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]<!-- google_ad_section_start -->speedbleed<!-- google_ad_section_end -->

[/FONT][FONT=Trebuchet MS, Verdana, Tahoma, Arial][/FONT]</TD><TD vAlign=top align=right>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]July 20 2000, 7:13 PM [/FONT]</TD></TR></TBODY></TABLE><TABLE cellSpacing=0 cellPadding=1 width="100%" border=0><TBODY><TR><TD style="PADDING-LEFT: 45px">
[FONT=Trebuchet MS, Verdana, Tahoma, Arial]<!-- google_ad_section_start -->Source for speedbleedrs for the X ?<!-- google_ad_section_end -->

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[/FONT]</TD></TR></TBODY></TABLE></TD></TR><TR><TD vAlign=top noWrap width="17.9%">[FONT=Trebuchet MS, Verdana, Tahoma, Arial]Mario[/FONT]
[FONT=Trebuchet MS, Verdana, Tahoma, Arial][/FONT]</TD><TD style="PADDING-LEFT: 30px" vAlign=top><TABLE cellSpacing=0 cellPadding=1 width="100%" border=0><TBODY><TR><TD align=left>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]<!-- google_ad_section_start -->Answers to your questions<!-- google_ad_section_end -->

[/FONT][FONT=Trebuchet MS, Verdana, Tahoma, Arial][/FONT]</TD><TD vAlign=top align=right>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]July 19 2000, 9:07 AM [/FONT]</TD></TR></TBODY></TABLE><TABLE cellSpacing=0 cellPadding=1 width="100%" border=0><TBODY><TR><TD style="PADDING-LEFT: 30px">
[FONT=Trebuchet MS, Verdana, Tahoma, Arial]<!-- google_ad_section_start -->Steve,
The brake calipers were replace last year and have worked fine until I recently replace the master cylinder(I bought a new one from International Auto). I checked to make sure the rubber inlet and metal lines where not kinked. I also made sure that I routed the lines correctly(from the MC). Everything seems to be OK. I'm going to try the suggestions listed in these response to see what happens.

I assume that I've got air in the system(and that it's not a MC problems) because the brakes feel spongy. I assume that if I had pedal fade that my MC was bad. Is this correct?

Wish me luck. This is getting frustrating!

Mario.<!-- google_ad_section_end -->

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[/FONT]</TD></TR></TBODY></TABLE></TD></TR><TR><TD vAlign=top noWrap width="17.9%">[FONT=Trebuchet MS, Verdana, Tahoma, Arial]<SCRIPT language=Javascript> <!-- var n54_em; n54_em = ""; n54_em = n54_em + "s";n54_em = n54_em + "e";n54_em = n54_em + "r";n54_em = n54_em + "v";n54_em = n54_em + "i";n54_em = n54_em + "c";n54_em = n54_em + "e";n54_em = n54_em + "@";n54_em = n54_em + "i";n54_em = n54_em + "m";n54_em = n54_em + "p";n54_em = n54_em + "o";n54_em = n54_em + "r";n54_em = n54_em + "t";n54_em = n54_em + "a";n54_em = n54_em + "u";n54_em = n54_em + "t";n54_em = n54_em + "o";n54_em = n54_em + "t";n54_em = n54_em + "e";n54_em = n54_em + "c";n54_em = n54_em + "h";n54_em = n54_em + ".";n54_em = n54_em + "c";n54_em = n54_em + "o";n54_em = n54_em + "m"; document.write("steve ambrose"); // --> </SCRIPT>steve ambrose <NOSCRIPT></NOSCRIPT>[/FONT]
[FONT=Trebuchet MS, Verdana, Tahoma, Arial][/FONT]</TD><TD style="PADDING-LEFT: 45px" vAlign=top><TABLE cellSpacing=0 cellPadding=1 width="100%" border=0><TBODY><TR><TD align=left>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]<!-- google_ad_section_start -->Good answers!<!-- google_ad_section_end -->

[/FONT][FONT=Trebuchet MS, Verdana, Tahoma, Arial][/FONT]</TD><TD vAlign=top align=right>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]July 19 2000, 11:59 AM [/FONT]</TD></TR></TBODY></TABLE><TABLE cellSpacing=0 cellPadding=1 width="100%" border=0><TBODY><TR><TD style="PADDING-LEFT: 45px">
[FONT=Trebuchet MS, Verdana, Tahoma, Arial]<!-- google_ad_section_start -->Hi Mario, you are right that it's probably just air in it. Glad to hear that it's new, and from a reputable source. If you have just tried a vacuum bleeder, I would try the 2 person method next. Ulix has great advice. Good luck,
Steve<!-- google_ad_section_end -->

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[/FONT]</TD></TR></TBODY></TABLE></TD></TR><TR><TD vAlign=top noWrap width="17.9%">[FONT=Trebuchet MS, Verdana, Tahoma, Arial]Mario[/FONT]
[FONT=Trebuchet MS, Verdana, Tahoma, Arial][/FONT]</TD><TD style="PADDING-LEFT: 15px" vAlign=top><TABLE cellSpacing=0 cellPadding=1 width="100%" border=0><TBODY><TR><TD align=left>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]<!-- google_ad_section_start -->Success! It took a while though! Thanks all! <NT><!-- google_ad_section_end -->

[/FONT][FONT=Trebuchet MS, Verdana, Tahoma, Arial][/FONT]</TD><TD vAlign=top align=right>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]July 24 2000, 9:20 AM [/FONT]</TD></TR></TBODY></TABLE><TABLE cellSpacing=0 cellPadding=1 width="100%" border=0><TBODY><TR><TD style="PADDING-LEFT: 15px">
[FONT=Trebuchet MS, Verdana, Tahoma, Arial]<!-- google_ad_section_start -->.<!-- google_ad_section_end -->

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