Master cylinder

[Kim K Kaiser]

Instead of bugging all w seemingly mundane question,  i visited utube for soft brake, bench bleeding MC,  etc.And yet, here i am again  I hv bled brakes, no air,  no leaks in my mc cylinders,  both were i filled them. No leaks at lines, front or back or brake cylinders,  so i found symptom of firm brake then slide to floor, hv to pump to get back to stopping power.  Well i deemed it  "bypassing" in the MC.  So. Ordered appropriate delco MC.  Took off old, noted a rubber gasket in poor shape.  Torn and warped   see photo.  

Well when i opened new, there  was no gasket.  I thought, no problem, went to napa et al,  they said dnt hv separately.  So went bk to amazon to review photo, and there was a picture w this foam looking thing,  a filter.  I read a prior post on 63 forum and it was a foam filter i guess they use now,  could that be possible?  Anyway, i tore house up looking for that filter, but i know it wasnt there initially.  But it looks like a piece styrofoam pipe insulation, which isnt on the removed part.  So i contacted amazon, will send newtold them to ck to make zure foam an rubber there.

Can the filter that looks like pipe insulatiin be the new replacement fir the rubber?  Semms an odd material change.

If that is not it, were would that rubber part b sourced from? If not included w main part?

[3ft7bqmb7dryo]

That O ring helps to seal the booster from vacuum leaks. There should also be a rubber disk around the push rod coming out of the booster.   I would go with a new O ring from your favorite parts store. Just size it up.

[Kim K Kaiser]

yes, there is a rubber piece on the face of the booster, seems to be in good shape,, i found a ruber gasket that fits the groove and feels to be the same thickness and depth of the original one,, looks to b a bout a 1 and 3/8 I.D.

see how it goes tomorrow

[Kim K Kaiser]

UPDATE/p>

i went to local stores,, hardware and auto parts, found best avalailbe matching gasket/o ring.

bled MC and hooked up, no more soft brakes,, has a good solid feel. WAAAAYYY better that before, apparently, prior MC had a problem internally.

ALSo, in re greasing front end.. the zerks on lower BJ were not in a advantageous location of the hand held grease gun, the fitting location made it impossible to make a good attachment for the grease gun so no grease could go in.. so i removed the old zero, put in a 45 degree zerk.  pumped it up with grease,, like 8 or 9  pumps,, seemed almost empty!!  then replace with old zero, both sides done, squeak is better,  didnt get around to putting in zerk on top, will get to that in next couple days,, 

anyway,, tow more things off the the list,, MC and greasing frame..... the saga continues!!!

[3ft7bqmb7dryo]

Keep plugging away at your list.