Quote:
Originally Posted by JamesDean
Alright. I replaced the lines, no real differences.
I replaced the master cylinder, bled the system with a power bleeder, I opened each bleeder for like 30 seconds to get all the air out...still feels soft. Like I dont get any REAL breaking power until I hit 3/4 pedal travel..
When I got the old master out, I squeezed the piston on it and fluid shot out of the side port, but nothing from the top port...is that a return? or does that indicate that its bad?
Whats next on this list? Could the calipers be bad?
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On my W123 I often need to bleed a bit longer than 30 seconds to get the air out... it isn't really a time thing - it is more of a stubborn bubbles still coming out thing.
If I were you I'd give the system another bleed - if you still see bubbles - keep going!
Another trick - just in case you are still busy welding - is to wedge the brake pedal down for a night or two or three! I read this tip on this forum but I've forgotten who posted it originally - so credit goes to ???? - still if this makes even a slight difference then you know it is air in the system.
As for the calipers you can check them out by pushing the pistons back in - catch fluid that pops back out of the MC with rags (it has to go somewhere) - and then get someone else to apply the brakes whilst you watch the piston travel. They should be fairly smooth. Sometimes it is difficult to see this on a car - you can test this with the calipers removed from the car but you need stop the pistons from popping out with an appropriate sized block of wood (for example).