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Tips
Tips

An ever increasingly frustrating problem

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M

Merlin the MG

Freshman Member
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I have spent at least 6 hours trying to figure this out.

I have a 67 mgb roadster mk I. I rebuilt the clutch slave cylinder completely and totally replaced the master cylinder. So why won't it move fluid when i bleed it? I've tried everything I can think of: from the traditional tube down to waste to using my finger as a temporary cork in the slave bleed screw. i've tried waiting between pumps and pumping many times in a row. So I ask you, why will this brand new cylinder that is installed perfectly and connected to a slave cylinder that is also installed without error not move that darn fluid? I am at the end of my road here, fellas. Any ideas?/ubbthreads/images/graemlins/confused.gif

Joey
 
Do you have one of those Eazibleed kits or are you doing it the traditional way? Is the fluid moving down properly but then going back up the tube when the pedal is raised? I must assume that if you are going the traditional route, you are closing the nipple before allowing the pedal to come back up?
 
Did you bench bleed the master cylinder before you installed it? If you didn't, you can pump and try to bleed the system forever without results.
Jeff
 
I did do it the conventional way (with tightening and loosening the bleed screw) however I did not "bench bleed" to the best of my knowledge. Do explain.
 
Joey, "bench bleeding" is required to get the air from the new master cylinder prior to installation.

Put the cylinder in a vise, with the outlet tilted up a bit. Run a line from the cylinder outlet back to the reservoir. (I put a short piece of clear tubing on the reservoir end to make things easier.) Fill the reservoir, and make sure the tubing is submerged in the fluid. Pump the cylinder manually, making sure you get full stroke on it, until no bubbles appear in the fluid.
Reinstall in the car, hook everything back up, and finish bleeding the system conventionally.
That should solve your problem.
Jeff
 
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