Brake Question
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Honda-Tech Member
Joined: Sep 2005
Posts: 192
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From: KC, MO
Brake Question
92 Accord LX, 360K, 10K old tires
Pads and shoes are new 5K ago - verified plenty left. Rotors and drums are new too - they are smooth. Recently, the pedal is getting mushy. I bled all 4 with no difference making sure that the new fluid made it out. The master cylinder, wheel cyls, calipers and lines are all original.
When the roads are wet, the car is too fast to lock up the front tires and slide a bit. I am not sure if it is both front wheels, or just one. When it is dry, the pedal will go all the way to the floor and the no wheels ever lock up (non ABS).
Is it time for a new master cylinder? Anything else problematic to check/change?
Thanks in advance.
Pads and shoes are new 5K ago - verified plenty left. Rotors and drums are new too - they are smooth. Recently, the pedal is getting mushy. I bled all 4 with no difference making sure that the new fluid made it out. The master cylinder, wheel cyls, calipers and lines are all original.
When the roads are wet, the car is too fast to lock up the front tires and slide a bit. I am not sure if it is both front wheels, or just one. When it is dry, the pedal will go all the way to the floor and the no wheels ever lock up (non ABS).
Is it time for a new master cylinder? Anything else problematic to check/change?
Thanks in advance.
Honda-Tech Member
Joined: Sep 2008
Posts: 836
Likes: 2
From: Leonardtown, MD, USA1
Re: Brake Question
^ this.
Had this type of issue in my car. Only on hot humid summer days. The piston seals would swell and get soft, and fluid would leak past. So the pedal at stop lights would slowly start to drop down until i had to pump it real quick and hold again.
Also, what is the condition of the fluid? That actually can have an affect on pedal feel. The fluid can absorb too much moisture and start to boil, causing a soft pedal. A good manual brake flush could be in order. I know mine was, and pedal felt great afterwards.
Had this type of issue in my car. Only on hot humid summer days. The piston seals would swell and get soft, and fluid would leak past. So the pedal at stop lights would slowly start to drop down until i had to pump it real quick and hold again.
Also, what is the condition of the fluid? That actually can have an affect on pedal feel. The fluid can absorb too much moisture and start to boil, causing a soft pedal. A good manual brake flush could be in order. I know mine was, and pedal felt great afterwards.
Thread Starter
Honda-Tech Member
Joined: Sep 2005
Posts: 192
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From: KC, MO
Re: Brake Question
Fluid is about 2 days old. I ran almost 32 oz through it to make sure and get all of the old out. It made absolutely no difference.
Should I replace the calipers and wheel cylinders while I am at it? They are original at 360K and I plan to put another 140K on this sled.
Should I replace the calipers and wheel cylinders while I am at it? They are original at 360K and I plan to put another 140K on this sled.
Re: Brake Question
No reason to replace the calipers if they're working. You can buy a OEM rebuild kit (believe TAS Auto sells one) and redo the seals on them.
I'd also recommend you spring for a new OEM BMC and not a remanufactured or offbrand one. The quality is much better and you know the "rebuild" (since it's new
) is going to actually last. There's quite a few threads were people got the NAPA/Advance Auto parts and they were faulty.
I'd also recommend you spring for a new OEM BMC and not a remanufactured or offbrand one. The quality is much better and you know the "rebuild" (since it's new
) is going to actually last. There's quite a few threads were people got the NAPA/Advance Auto parts and they were faulty.
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