I've had my master cylinder re-sleeved by White Post back in 1990....
I used DOT 3 in the beginning, then changed over to DOT5 back in 1995, thinking that it would last w/o absorbing water.
Is it time I should rebuild the master cylinder with new seals? I didn't know White Post won't honor their lifetime warranty if DOT 5 is used...(makes me wonder why).
Its seems to me that the pedal is going down further than it used to, and I see no leaks......so I'm thinking a rebuild is in order because of the age of the seals???
Thanks...
I had my '69 Corvette Calipers sleeved/rebuilt by LoneStar calipers in 1989, and I rebuilt the MC using std OTS kit, and used DOT 5 in the system at that time, and I haven't had the first issue since. The car only gets driven a few times a year, but No issues with brakes (and THAT is why I used the DOT 5).
The only facts different about your car is that you first used Dot3, then changed to Dot 5 (I think that is generally a No no with rubber seals/parts).
I also had WhitePost rebuild a couple of MC for me over the years ('60 Corvette MC around 1995) and my '69 Z28 MC in 2012; yes WhitePost told me in 2012 not to run Dot 5, but I did it anyway. Without any info/data as to why I don't follow any/all 'suggestions' I get.. :) Personally I won't worry about it unless I see a leak, and if I do, I'll buy my own seal kit and rebuild again with Dot5.
Mike Gibbons did a master cyl & a meter valve. He too says warrantee void if dot 5 is used. He recommends dot 4. So far so good...Joe
Camaro Disc Brake Master Cylinder Rebuild Kit, 1967-1969
Order a kit and re-seal it, use good tear down notes and Chassis Service and or overhaul manuals.
Since it had been resleeved your bores should be fine and no need to replace seats.
DIY it!
Ordered a kit last night - I'll rebuild it just to make sure....
**Commentary**
Since I have owned my F bodies since the 80's, I am now finding that it is a continual cycle of repairing things that I once rebuilt or had rebuilt, even garage time and sitting is hard on various systems, Brakes Esp.
Yeah - I've noticed that my pedal is going down further than it use to - so maybe its time to rebuild.
I totally agree on what you said Indy.......