Brake Bleeding Problem

[Larry & Marilyn]

Hello Group I have a strange problem and I am baffled. I am trying to bleed my brakes and I cannot get all the air bubbles out of the right front line. The other three lines are clean and air free. I have run at least two quarts of brake fluid through the lines. Each time I open the bleed valve I get a little burst bubbles. I can find no leaks. It would seem that the air must come from the wheel cylinder or the master cylinder, but I do not understand how this can happen. The pedal is up and firm. I does not feel spongy like it would if there air in the lines. I have bled many brakes on other cars, including a TD, and never encountered this problem. Any suggestions? Larry TC 4703 [Non-text portions of this message have been removed]

[Paroor]

Hi Larry, Did you inspect the front brake cylinder after removing the brake drums ? Madhu -----Urspr ngliche Nachricht----- Von: mg-tabc@yahoogroups.com [mailto:mg-tabc@yahoogroups.com]Im Auftrag von Larry & Marilyn Gesendet: Freitag, 12. August 2005 06:55 An: mg-tabc Betreff: [mg-tabc] Brake Bleeding Problem Hello Group I have a strange problem and I am baffled. I am trying to bleed my brakes and I cannot get all the air bubbles out of the right front line. The other three lines are clean and air free. I have run at least two quarts of brake fluid through the lines. Each time I open the bleed valve I get a little burst bubbles. I can find no leaks. It would seem that the air must come from the wheel cylinder or the master cylinder, but I do not understand how this can happen. The pedal is up and firm. I does not feel spongy like it would if there air in the lines. I have bled many brakes on other cars, including a TD, and never encountered this problem. Any suggestions? Larry TC 4703 [Non-text portions of this message have been removed] Yahoo! Groups Links

[Davidtasa@aol.com]

Larry, It might be that, this one brake bleeding screw is leaking slightly at the threads and letting in air when turned out during bleeding. You can try removing the bleeder screw and carefully wraping the threads with some teflon tape. Insert it and try bleeding again. I've experienced a small stream of tiny bubbles from bleeder screws that were leaking slightly at the threads when turned out for bleeding. It's worth a try, perhaps. David TC 3896 (which just yesterday again passed the bi-annual German motor vehical safety inspection! MOT or equivilent) Bad Soden, Germany [Non-text portions of this message have been removed]

[joecurto@aol.com]

Larry if you have a good and firm pedal why are you continuing to bleed system.? if you bleed system and you lose pedal after a while check out the copper washers on the banjo bolts. Sometimes we clean all the fittings with brake clean, blow them out so that they are dry and let system sit and look for moisture at the fittings you could have bad flares. Joe [Non-text portions of this message have been removed]

[Peter Roberts]

Larry, I have just complete the Great Brake Problem of 2005. Pedal went to the floor after Winter storage. But, I could not find any fluid leaks, and no spots on the floor after topping off the reservoir and many pumps on the pedal. Many diagnostics and replacements and rebuilds later, I concluded that: 1. The copper washers at the end of the MC had hardened to the point that they had become brittle and allowed a very small leak. 2. The connections at the wheel cylinders and elsewhere had loosened over time due to vibration and allowed a very small leak. 3. The brake bleeders had worn over time and were allowing a small leak. Choose your fault. All I got was soft pedal and endless bubbles when trying to bleed the brakes. Solution: 1. Installed a set of EZbleed bleeders. A marvelous invention that permits one-man bleeding. 2. Wrapped every @$#%#$ connection with Teflon tape. 3. Installed a new set of copper washers. Result: The best brake pedal in years. Good Luck! _Peter

----- Original Message ----- From: "Larry & Marilyn" 48mgtc@shasta.com> To: "mg-tabc" mg-tabc@yahoogroups.com> Sent: Friday, August 12, 2005 12:55 AM Subject: [mg-tabc] Brake Bleeding Problem > Hello Group > > I have a strange problem and I am baffled. > > I am trying to bleed my brakes and I cannot get all the air bubbles out of > the right front line. The other three lines are clean and air free. I > have run at least two quarts of brake fluid through the lines. > > Each time I open the bleed valve I get a little burst bubbles. I can find > no leaks. It would seem that the air must come from the wheel cylinder or > the master cylinder, but I do not understand how this can happen. > > The pedal is up and firm. I does not feel spongy like it would if there > air in the lines. > > I have bled many brakes on other cars, including a TD, and never > encountered this problem. > > Any suggestions? > > Larry > TC 4703 > > [Non-text portions of this message have been removed] > > > > > Yahoo! Groups Links > > > > > >

[Frank & Connie Mount]

Hi Larry When I had this problem I eventually called my friend Bob Grunau who said, "You weren't silly enough to put the line in the top of the cylinder and the bleed screw in the bottom were you?" Apparently I was. My problem was only diagnosed after rebuilding the master cylinder unnecessarily. Frank TC 2081 [Non-text portions of this message have been removed]

[Peter Cole]

Hi all, I have noticed an inexhaustible quantity of air bubbles when bleeding brakes in the past. I eventually realised that the problem was caused because I was using plastic pipe on the bleed nipple to collect the fluid, which was not sealing well on to the nipple. In fact air was being drawn into the plastic pipe with each pump of the brake pedal, making me believe the brake line was full of air when it wasn't. The solution is to use a rubber pipe to connect to the nipple. The rubber is much more elastic and seals well to the nipple, hence doesn't allow air to enter. Peter Cole. Frank & Connie Mount wrote:

>Hi Larry > >When I had this problem I eventually called my friend Bob Grunau who said, "You weren't silly enough to put the line in the top of the cylinder and the bleed screw in the bottom were you?" Apparently I was. >My problem was only diagnosed after rebuilding the master cylinder unnecessarily. > >Frank >TC 2081 > >[Non-text portions of this message have been removed] > > > > >Yahoo! Groups Links > > > > > > > > > >