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27th July 2019, 08:52 PM
#1
Brake Pedal doesn't hold ... Master Cylinder issue?
G'day guys,
The brake pedal isn't holding. I'm assuming it's the Brake Master Cylinder as there are no leaks anywhere. Is there a way to repair it without having to fork out the $400 to buy one? Also heard that I shouldn't buy a second hand one as the seals may have dried out and you can't tell as it's a sealed unit.
ANY advice would be realy appreciated.
Cheers,
Darren
I drive a Nissan Patrol 2012 GU 3.0 Diesel with ABS
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27th July 2019 08:52 PM
# ADS
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28th July 2019, 08:45 AM
#2
The master cylinder itself is pretty simple, spool and a couple of o'rings and spring, but the ABS is another matter. I wouldn't stuff with it unless 100% certain of what you are doing - perhaps best left to a brake expert.
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15th August 2019, 09:52 PM
#3
When you say its not holding. Exactly what do you mean? The Patrol wont stop when the brakes are applied? The pedal slowly sinks to the floor whilst stationary?
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16th August 2019, 10:44 AM
#4
The bloody things don't stop anyway, even when you're brakes are 100%, well mine doesn't.
I thought I had a crappy master cylinder at around 80,000ks. The pedal would just sink to the floor if I kept pressure on the pedal, never got a hard pedal. Got it replaced with a brand new one, exactly the same thing happened, I gave up.
I'm in the habit of pumping the pedal before braking now.
So what you're experiencing may be normal????
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16th August 2019, 12:53 PM
#5
Originally Posted by
10G
The bloody things don't stop anyway, even when you're brakes are 100%, well mine doesn't.
I thought I had a crappy master cylinder at around 80,000ks. The pedal would just sink to the floor if I kept pressure on the pedal, never got a hard pedal. Got it replaced with a brand new one, exactly the same thing happened, I gave up.
I'm in the habit of pumping the pedal before braking now.
So what you're experiencing may be normal????
Should have replaced the M/cyl with the 4.8L one. Sligthly bigger bore size. I upgraded the calipers, rotors and m/cyl to 4.8 spec, also fitted braided lines and now it stops too good. Dangerous in the wet. It need ABS now....
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16th August 2019, 10:18 PM
#6
Originally Posted by
mudski
Should have replaced the M/cyl with the 4.8L one. Sligthly bigger bore size. I upgraded the calipers, rotors and m/cyl to 4.8 spec, also fitted braided lines and now it stops too good. Dangerous in the wet. It need ABS now....
A good move.....
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mudski (16th August 2019)
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16th August 2019, 10:50 PM
#7
.........
Originally Posted by
Dar
G'day guys,
The brake pedal isn't holding. I'm assuming it's the Brake Master Cylinder as there are no leaks anywhere. Is there a way to repair it without having to fork out the $400 to buy one? Also heard that I shouldn't buy a second hand one as the seals may have dried out and you can't tell as it's a sealed unit.
ANY advice would be realy appreciated.
Cheers,
Darren
I drive a Nissan Patrol 2012 GU 3.0 Diesel with ABS
G’day Dar mate!
Just spent quite a few well worth dollars too on bringing Mrs MB’s GU brakes back to original specifications, pedal feels great again for a 3,000kg truck
Are running some great 4.8L later model/variant stuff too on my old paddock diesel ute but unsure if that meets insurance quirky stock needs?
Sent from my iPhone using Tapatalk
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