MG-Cars.net

Welcome to our resource for MG Car Information.

Recommendations

Parts

MG parts spares and accessories are available for MG T Series (TA, MG TB, MG TC, MG TD, MG TF), Magnette, MGA, Twin cam, MGB, MGBGT, MGC, MGC GT, MG Midget, Sprite and other MG models from British car spares company LBCarCo.

MG MGA - Problems with Brake Bleding

I've installed a new master cylinder, new rear brake pistons, new front calipers and a new clutch cylinder.

I used an eze-bleed.

I've run more than a pint of fluid during the bleeding process. I attached a vinyl hose and created an upward bend to watch for air bubbles and run fluid through until bubbles aren't visible.

The brakes are still soft and have to be pumped up to get the peddle firm.

I am mystified. I've bled out the brakes several times in the past with no problems whatsoever.

Suggestions?
Tysen McCarthy

I guess a couple of questions first:

1- What type of brake fluid (silicone vs. glycol)?

2- If you push the brake pedal down firmly, does it slowly go down?

3-) What brand of new MC?

Could be internal leakage within the MC; could be micro bubbles in the brake fluid; could be brake shoe adjustment needed; could be air trapped in the wheel cylinders/calipers; could be new MC is bad, as issues have been known to crop up in some new units.

Nick Kopernik

Are the rear brake shoe springs in place? Bleed nipples in the proper positions? Does pressure hold if you press the pedal hard and hold it there? Or does the pedal slowly sink? RPV in place in the master? If all components are working correctly yet you have to pump the brakes to get a proper pedal then there has to be air somewhere. Personally I hate those EZ-Bleeds. I usually prefer old fashioned foot pumping.
Steve Simmons

This thread was discussed on 08/04/2022

MG MGA index

This thread is from the archive. The Live MG MGA BBS is active now.