Re: Master cyl. bleeding

Posted by Owen_Dyneto On 2009/8/10 12:23:23

You're right, bleeding is no different than with a manual master cylinder, and best done with the engine not running though some extra foot pressure will be required. Accepted practice is to start with the wheel cylinder furthest from the MC.

EDIT - But I've never actually done it by running a line from the wheel cylinde outlet back to the MC; I usually have a buddy press down on the brake pedal and then open the wheel cylinder to purge the air/fluid, and make sure the WC port is closed before the pedal is allowed to rise. You can also run a tube from the WC into a jar of fluid (line below the liquid level). But in either of these methods you need to check that the MC fluid level doesn't fall too low.

EDIT - thanks guys for picking up on my error, I missed that the query was just about bleeding the master, not the system. But flushing or at least replacing brake fluid at intervals is a bit of maintenance that I think is for the most part neglected by many owners, so even if just the master was in need of bleeding, I'd be inclined to thoroughly bleed the entire system if it hadn't been done recently.