[Healeys] Clutch question

john spaur jmsdarch at sbcglobal.net
Thu Sep 2 23:33:44 MDT 2010


I have honed many healey hydraulic cylinders only to find dirty brake 
fluid shortly thereafter damaged piston seals. Caused, no doubt, by 
honing the cylinders! No more honing!

John

At 09:05 PM 9/2/2010 -0700, you wrote:
>Good question.
>
>I have always assumed the bores were treated, since they have a 
>slick, shiny surface which isn't characteristic of untreated 
>aluminum, which is usually porous and dull in appearance.
>A quick question to Mr. Google returned:
>
>http://www.ehow.com/how_5940980_rebuild-wheel-cylinder.html
>
>.... Aluminum wheel cylinders should never be honed. Aluminum wheel 
>cylinders have a hard, protective, anodized surface inside to 
>prevent corrosion. Honing will remove this surface.....


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