the questions keep on coming

[JPSmit]

I don't want to dismantle my brake master cylinder but I do want to switch to DOT 5 - how can I flush it out?

thanks again - you guys are awesome!!!

 

[JPSmit]

So, I dropped an email to a colleague and also mentioned I was redoing the brakes today - here is his reply

"Brakes? Suspension is the most important thing. This allows you to swerve violently when going over the crest of a hill at night at high speed and discovering that one of your girlfriends is tied up in the middle of the road. If the suspension (combined with some good sticky Avons) is in good nick, brakes are superfluous."

LOL

 

[HAN8L1965]

I thought I read here that a flush of methanol will do the job?

Mark

 

[bugimike]

Is methanol safe for the rubber parts?

 

[JPSmit]

and how do you actually flush it? I have been spraying brake cleaner in the holes (reservoir is off) but am not sure how effective it is. I suppose I could hook it up and force liquid through it as though it were brake fluid - thoughts?

 

[jcatnite]

Brake cleaner is probably not safe for the o-rings. I'm pretty sure it will swell them up.
JC

 

[DrEntropy]

yeah, that stuff will soften the seals. Hate to say it JP, but you should now seriously consider rebuilding the MC. There's really no other way to clean the stuff out but disassembly and renew the seals. Run a "brake hone" thru the MC on a variable speed drill, slowly using back-and-forth motion with light oil to break the glaze from the I.D. and inspect it for pits and corrosion, too.

Use denatured alcohol as a flushing agent for lines, etc.