After renewing my brake fluid yesterday it dawned on me that the bleeder is on the banjo bolt so there would have been very little actual fluid changed from within the caliper itself, which might be where most of the manky fluid is.
No doubt eventually some of the new brake fluid will make its way in there (but not very much).
So it seems the only safe way to do a thorough flush would be;
Flush the lines from the master as per the manual.
Caliper off, pads out and then pump the piston out a little.
Clean all around the pistons to ensure they're clean & safe to drive them right back in.
Crack the bleeder with a drain hose attached.
Drive all the pistons in to push out as much of the old fluid as possible.
Re-fit and bleed to refill with fresh fluid.
Repeat with the other caliper.
What do you guys reckon?
Also has anyone got a tool that is good at pushing in several pistons at once?
I'm thinking of just making something using a couple of bolts and a threaded rod connector.
No doubt eventually some of the new brake fluid will make its way in there (but not very much).
So it seems the only safe way to do a thorough flush would be;
Flush the lines from the master as per the manual.
Caliper off, pads out and then pump the piston out a little.
Clean all around the pistons to ensure they're clean & safe to drive them right back in.
Crack the bleeder with a drain hose attached.
Drive all the pistons in to push out as much of the old fluid as possible.
Re-fit and bleed to refill with fresh fluid.
Repeat with the other caliper.
What do you guys reckon?
Also has anyone got a tool that is good at pushing in several pistons at once?
I'm thinking of just making something using a couple of bolts and a threaded rod connector.