Hi Roland,
I have the diaphragms installed in my Marcos (bought them from Dave
Bean). The inside diameter of my reservoirs are 1 3/8 and 2 1/8. I
haven't had them in long enough to comment about their effectiveness,
but in theory they should be better and in my case, they haven't had any
bad effects.
Mike Denman
1966 Marcos
Roland Dudley wrote:
>
> Next question for today.
>
> Dave Bean Engineering, and others I'm sure, sell accordion shaped rubber
> diaphragm that fit under brake and clutch reservoir caps. The purpose
> of these diaphragms is to give an air tight seal to reservoirs to
> isolate them from atmospheric moisture and yet not cause back pressure
> if the fluid level drops. I have similar diaphragms for my Chevy van's
> brake reservoirs, though they are shaped differently. I've been
> thinking about getting some of these for my snake's reservoirs and I was
> wondering if any of you have them on your cars and what you think of
> them.
>
> And one more question- Dave Bean's catalog lists two sizes of caps and
> diaphragms, large and small. I think my caps are small, but there
> aren't any dimensions listed. My caps are ~1 3/4" in diameter, if I
> recall. Is that correct for the small size?
>
> Thanks,
>
> Roland
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