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 - Brake system capacity - 1600

For the pedants, tight wads or mathematicians amongst us - I am looking for the capacity of a 1600 brake system (extended master cylinder and disc brakes). I have started to change the brake fluid using the gunson Eezibleed. I put 500 mls of DOT4 through the system and have only done the front disc brakes!

I lowered the reservoir level in the master cylinder first to avoid mixing old and new fluid then ran the new fluid through the front brakes in to a measuring cylinder so I know I have put in 500 mls and have taken out 500 mls. If I knew the capacity of the master cylinder, each front caliper, the rear brake cylinders, clutch slave cylinder and the line capacities (now I am getting pedantic) I would know how much to run through each bleeder to completely replace the fluid in that unit and not waste any fluid. Does anyone know these capacities?

Regards
Mike


Mike Ellsmore (1)

Mike - you can calculate the volume of the pipes by the half the pipe ID squared x 3.142 (ie, pi r squared) x the total pipe length, plus the master cylinder volume which is internal height x length x width.
Or you can run brake fluid into the system until it looks clear when it comes out of each bleeder!
Peter.
P. Tilbury

Peter,
I am fine with maths - I was just hoping someone had done the measurements and calculated the capacity of the hydraulic system. I will just use a litre of fluid, $A24, and waste a bit making sure all is flushed. Interestingly the new fluid is the same as the old fluid so you do see a change when it comes out. (Current fluid is over 4 years old).
Regards
Mike
Mike Ellsmore (1)

Sorry - typo above - I meant "you do not see any change in colour between the two fluids".
Mike
Mike Ellsmore (1)

This thread was discussed between 14/09/2008 and 17/09/2008

MG MGA index

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