Replaced master brake cylinder. bled the system. Pedal hard when engine off but bit mushy when on.
2007-10-31 11:19:58 · 7 answers · asked by Nordic god 1 in Cars & Transportation ➔ Maintenance & Repairs
thank for quick reply. has power brakes. no abs. Whats the manual bleed for brake cly? I might bring it somewhere
2007-10-31 11:41:55 · update #1
If you have power brakes, that might be the cause of it. When the engine is off, the power brakes are not power-assisted. Engine on, power assisted, so it takes less effort to push the pedal.
If the "mushiness" of the pedal (with engine on) feels different than before you replaced the master cylinder, then you could still maybe have air in the system.
Also, most master cylinders must also be "bench bled", or bled by hand before they are installed in the car. If your is one of those, and you did not do it, there will likely still be air hiding in the master cylinder.
If you have any doubts, take the car to a tire and brake shop and have them do a quick bleed job. It's usually pretty inexpensive, and they have the equipment to do it reliably, quickly, and easily.
2007-10-31 11:30:48 · answer #1 · answered by tallcowboy0614 6 · 0⤊ 0⤋
On a power brake system it will be hard when the engine is off as there is no vacuum for the power booster. Some of the newer cars with ABS require a special tool to bleed the rear brakes properly. If your car has ABS that could be the problem. Also did you bleed the master cylinder prior to attaching the lines. If not you probably still have air in the system.
2007-10-31 18:30:45 · answer #2 · answered by mustanger 7 · 0⤊ 0⤋
that's typical acting of a power brake system as when there is no power the pedal is hard and when started the pedal goes down some, if you think it goes too far down re-bleed the wheels starting at the right rear, left rear, right front, and finally the drivers side front, I certainly hope you bench bled the master cylinder before you put it on.
2007-10-31 19:36:59 · answer #3 · answered by mister ss 7 · 0⤊ 1⤋
Sounds normal, as to the character of the power brake system.
If the brakes are fallen more than before you did the job,
Id say rebleed.
Theres a one man bleeder kit for about 6 bux works pretty
good got it at auto zone.
2007-10-31 23:27:48 · answer #4 · answered by PENMAN 5 · 0⤊ 0⤋
kkk
if check your brake boooster and the hose check your brake fluid check your master cylinder seals but it is most probably your brake booster bleed it again
2007-10-31 18:42:17 · answer #5 · answered by 1999 Nissan Skyline GTR Vspec 5 · 0⤊ 1⤋
Sounds like air in your brake system somewhere.
2007-11-01 00:17:49 · answer #6 · answered by Alanrt1 4 · 0⤊ 1⤋
sounds like it still has an air pocket in it.try bleeding it again
2007-10-31 18:28:06 · answer #7 · answered by mrs_pipesmoker 7 · 0⤊ 0⤋