: All our British cars run DOT-5 fluid.
: The GT6 has had it the longest at about
: 24 years. I did replace the seals last
: year as a cautionary step in response
: to what I describe in the paragraph
: We had the clutch master cylinder
: (running DOT-5) fail after 22+ years.
: Disassembly showed the main seal had
: turned to black goo. I have only seen
: this happen with rubber parts
: previously used with DOT-3/4 being
: re-used after converting to DOT-5. I
: suspect that the aftermarket clutch MC
: had been factory lubricated with
: DOT-3/4 instead of the red rubber
: grease. Regardless, to be safe I
: changed ALL the rubber brake seals and
: hoses on the GT6 since they were the
: same age as the clutch components.
: There was zero damage evident on any of
: the brake rubber parts used with DOT-5.
: My point is, if you completely flushed
: and washed the old system out, replaced
: ALL the rubber bits (hoses, seals, PDWA
: innards) that had ever seen DOT-3/4
: then you can expect years of good
: service from the DOT-5 fluid. When I
: have started with all new rubber bits
: and clean pipes I have never
: experienced any of the reliability or
: driveability problems you see listed on
: message boards.
: Doug L.
: --Previous Message--
: fwiw, my brake system is effectively
: all around. I dumped Dot 5 in and
: haven't noticed anything awry...
: Granted all I have driving under my
: belt at this point is a few laps around
: the neighborhood @ 25mph for about 10
: -ish miles.