I've removed my BMC to send off and get resleeved and resealed. I've read lots about the advantages of bench bleeding the BMC before reinstalling in the car. One question though for those that know, if I bench bleed the BMC and hence have brake fluid in the BMC, won't it puss out everywhere once I go and reinstall it in the car? Or am I missing something? Cheers
Don't make life more complicated for yourself. Bleed it on the car because you want to completely flush out ALL your crappy old fluid anyway. By the time you've purged your system of stale fluid, any air in there is gone anyway
+3 if you do it on the bench your coing to cry. If fluid gets on your paint. And there i a good chance it will
Ok so... I got the master cylinder back, all good. I won't bench bleed it. One quick question, once back on the car and brake bleeding, should I fully depress the brake pedal while bleeding? I read somewhere something about being careful when bleeding the brakes that you don't fully engage the piston in the BMC as you damage the seals? is this true or just rubbish? Cheers
Once set up and bled - the piston will never travel down to the bottom end However it should not ruin anything if you did depress it fully as the seals are at the end anyway (the problem is when its incorrectly adjusted and you push the seals past the end - its hard to do as it requires an incorrectly adjusted pedal etc.) The rule is to pump the pedal as required but slowly and without a lot of force- and it will be fine as long as you don't jump on it when at the start of bleeding or pump it madly at the beginning like an animal. You can do that at the end - LOL :rofl: Just slowly depress as required until bled and all will be good.
The other problem is with old MCs the bore at the end of travel can be rough from oxidation or full of gunk which can cause the seal to fail. Not going to be a problem with a new/rebuild master.
This is a very fair comment and has resulted in the early failure of many a rebuilt hydraulic cylinder. I never rebuild any cylinder, master or slave without thoroughly honing the bore from end to end to prevent this particular problem. E
.?:*¨¨*:?.W.?:*¨¨*:?.T.?:*¨¨*:?.F.?:*¨¨*:?. Do you really have to ask this question? If there is the slightest concern that the seals will be damaged if the piston travels the extent of the cylinder, the cylinder belongs in the rubbish bin. :bash: It's that simple.
