[Healeys] Brake master cylinder repair kit

[Bob Spidell]

A shop that rebuilt a serve MC for me--I believe they used a stainless sleeve--left a very fine hone pattern on the sleeve bore. Their argument/logic was basically the same as for leaving a hone on engine cylinders: with a perfectly smooth cylinder wall the seal scrapes all fluid off the wall, leaving none for lubrication; whereas a fine-honed surface allows a bit of fluid to lubricate the edge of the seal. 

Makes sense to me, but some things that make sense to me may not not be correct. 

Bob 


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Bob Spidell - San Jose, CA 

----- Original Message -----


Michael, 

Kees is correct that it must be perfectly smooth and a cylinder that old 
probably isn't.