Installed 300zx/Cobra BBK - Questions
#1
Installed 300zx/Cobra BBK - Questions
I just finished the install of the 300zx calipers, cobra 13" rotors and SS lines on the front only.
The brake pedal seems to need more travel to get it to stop. When the car is idle or off, the brake pedal is rock solid and the travel is normal distance like stock as it supposed to be but when driving around, the pedal sinks halfway down until it finally gets hard and the car stops great at that point. I want to know what the problem is with the pedal sinking? Theres no leaks and we bled the car several times and there seems to be no more air bubbles in the system.
The brake pedal seems to need more travel to get it to stop. When the car is idle or off, the brake pedal is rock solid and the travel is normal distance like stock as it supposed to be but when driving around, the pedal sinks halfway down until it finally gets hard and the car stops great at that point. I want to know what the problem is with the pedal sinking? Theres no leaks and we bled the car several times and there seems to be no more air bubbles in the system.
#3
We did it about 3 times manually following the sequence and there was no visible air bubbles.
And the squishy sinking pedal only happens when braking when the car is moving. It feels perfectly firm and all that when the car is at idle at a stop
And the squishy sinking pedal only happens when braking when the car is moving. It feels perfectly firm and all that when the car is at idle at a stop
#4
Ok, I think I might know what happened. When I disconnected the left front brake line to replace it with the SS line, the resovoir all drained out empty. Will that cause my problem eventhough I properly bleed the brakes several times and didnt show any more bubbles?
#8
if he did fronts only he should only have to bleed the fronts...there are check valves that separate F & R lines....but it wouldnt hurt to blee the rears to make sure....any way try to bleed them more and always make sure that the master cylinder has plenty of fluid if u run low u could just be putting more air into the system
#9
We did all 4 corners in the correct order. I think I just need to keep bleeding them. But if there is air, why does the pedal feel normal when the car is at a stop but gets softer when im braking while moving?
#10
its a whole pressure thing....when ur stopped the pressure can build back up but when ur slowing down ur using all that pressure....trry bleeding them some more...it can take a while depending on how much air actually got in
#13
Originally Posted by Jeff92se
You might want to bleed the master cylinder if you ran it dry. 1/2 down is WAY too much. I have just a smiggen more travel ie..1/4" maybe?
#15
The pads are flush on the rotors and are breaking in against the rotors evenly. Sorry no pics yet. Ive done a Z/cobra install before and it came out good but I think its when I accidentally let the resovoir drain out is the problem and I just didnt bleed it enough
#16
Originally Posted by Nismo
We did all 4 corners in the correct order. I think I just need to keep bleeding them. But if there is air, why does the pedal feel normal when the car is at a stop but gets softer when im braking while moving?
#17
Originally Posted by Jeff92se
You might want to bleed the master cylinder if you ran it dry. 1/2 down is WAY too much. I have just a smiggen more travel ie..1/4" maybe?
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maxfever1987
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11-19-2016 08:01 PM