My brakes feel WEIRD!
#1
MBWorld Fanatic!
Thread Starter
Join Date: Jul 2005
Location: Boston
Posts: 3,094
Likes: 0
Received 0 Likes
on
0 Posts
is a German Tank
My brakes feel WEIRD!
the strangest thing happened this morning (I assume brake master cylinder)
I got into the car and drove away to work as usual, but when I got to the stoplight my brake pedal went all the way down towards the floor almost making me hit the person already at the light!
now mind you, they have always been hard as a rock, so I always assumed that perhaps I was in need of a new master cylinder...I have no idea whats going on.
my car still stops, but it is really strange that all-of-a-sudden my brakes are buttery smooth and the pedal goes all the way down to the floor before the brakes kick in.
Any input guys?? I would appreciate it.
I got into the car and drove away to work as usual, but when I got to the stoplight my brake pedal went all the way down towards the floor almost making me hit the person already at the light!
now mind you, they have always been hard as a rock, so I always assumed that perhaps I was in need of a new master cylinder...I have no idea whats going on.
my car still stops, but it is really strange that all-of-a-sudden my brakes are buttery smooth and the pedal goes all the way down to the floor before the brakes kick in.
Any input guys?? I would appreciate it.
#2
MBWorld Fanatic!
Join Date: Dec 2006
Location: St. Croix, US Virgin Islands
Posts: 1,033
Likes: 0
Received 0 Likes
on
0 Posts
1995 E320 SE, 162,000 Miles (Sold)
I agree with the master cylinder hypothesis. It's strange that it wouldn't do it every time, though. I assume the fluid level looks good?
#3
MBWorld Fanatic!
Thread Starter
Join Date: Jul 2005
Location: Boston
Posts: 3,094
Likes: 0
Received 0 Likes
on
0 Posts
is a German Tank
#4
Super Member
Join Date: Sep 2006
Location: New Jersey
Posts: 659
Likes: 0
Received 0 Likes
on
0 Posts
1989300CE(sold),1996Accord,02CBR954
I had that same thing happen to me when i first purchased the car.The pedal was really stiff.Then out of the blue it went down to the floor.It turned out to be two frozen rear calipers.I had the fluid flushed and the lines & calipers replaced and havent had a problem since.
Last edited by bjay51d; 02-08-2007 at 01:58 PM.
#5
Member
sometimes a piece of rust (or such) in the mstr cyl plunger will leave a gap in one of the o-rings, allow fluid bypass...OR (scary thought) primary shuttle valve in ABS stuck momentarily.....mstr cyl rebuild is cheaper....but the fact that fluid is full rules out wheel caliper issue....have you done any recent work on the brakes, leaving an air pocket?
#7
Super Member
Join Date: Sep 2006
Location: New Jersey
Posts: 659
Likes: 0
Received 0 Likes
on
0 Posts
1989300CE(sold),1996Accord,02CBR954
I wasnt talking literally frozen just rusted...Wow didntt even know that was possible.
Last edited by bjay51d; 02-08-2007 at 02:12 PM.
Trending Topics
#8
Member
he has been driving his car for awhile, so i imagine a frozen/rusty caliper would have shown itself earlier, but i see that the weather has been really cold, and upstate NY is under a mile of snow , but if it's below freezing and the brakes were wet last night, the first stop could be a long one
#9
Super Member
Join Date: Sep 2006
Location: New Jersey
Posts: 659
Likes: 0
Received 0 Likes
on
0 Posts
1989300CE(sold),1996Accord,02CBR954
he has been driving his car for awhile, so i imagine a frozen/rusty caliper would have shown itself earlier, but i see that the weather has been really cold, and upstate NY is under a mile of snow , but if it's below freezing and the brakes were wet last night, the first stop could be a long one
#10
MBWorld Fanatic!
Thread Starter
Join Date: Jul 2005
Location: Boston
Posts: 3,094
Likes: 0
Received 0 Likes
on
0 Posts
is a German Tank
Yes, we have had no day over 10 degrees Farenheight. windchill is at minus 15 F.
One thing: about two months ago, to anwser marco's original question, I replaced the rear brake pads. Two days before replacing them my brakes did the same thing they are doing now, but with a LOUD screech, really scary actually.
today my brakes continue to be buttery soft and just glide their way to the very end, where pedal meets the metal
very strange....and I dont want to put anyone in danger.
#11
Super Member
Join Date: Sep 2006
Location: New Jersey
Posts: 659
Likes: 0
Received 0 Likes
on
0 Posts
1989300CE(sold),1996Accord,02CBR954
#13
Super Member
Join Date: Sep 2006
Location: New Jersey
Posts: 659
Likes: 0
Received 0 Likes
on
0 Posts
1989300CE(sold),1996Accord,02CBR954
#14
MBWorld Fanatic!
Thread Starter
Join Date: Jul 2005
Location: Boston
Posts: 3,094
Likes: 0
Received 0 Likes
on
0 Posts
is a German Tank
#15
Super Member
Join Date: Sep 2006
Location: New Jersey
Posts: 659
Likes: 0
Received 0 Likes
on
0 Posts
1989300CE(sold),1996Accord,02CBR954
#16
MBWorld Fanatic!
Over the years I've had two master cylinder failures, both easily associated with sudden cold weather. Shrinking rubber, I expect.
#17
MBWorld Fanatic!
Thread Starter
Join Date: Jul 2005
Location: Boston
Posts: 3,094
Likes: 0
Received 0 Likes
on
0 Posts
is a German Tank
Negative my friend, you missunderstood my post.
I stated that the same buttery soft feeling has happened to me before, but LAST time that happened to me my brakes were making horrible squeeling noises, this time it's buttery soft sans screech.
I stated that the same buttery soft feeling has happened to me before, but LAST time that happened to me my brakes were making horrible squeeling noises, this time it's buttery soft sans screech.
#18
Member
soft pedal that almost goes down to floor, no unusual noise, full of fluid, very cold weather......COLd (read HARD) o-rings in mastercyl, allowing fluid bypass, not dumping it, but letting it squeeze by....did you say once stopped, the pedal will hold the car at a stop?
#19
MBWorld Fanatic!
Thread Starter
Join Date: Jul 2005
Location: Boston
Posts: 3,094
Likes: 0
Received 0 Likes
on
0 Posts
is a German Tank
soft pedal that almost goes down to floor, no unusual noise, full of fluid, very cold weather......COLd (read HARD) o-rings in mastercyl, allowing fluid bypass, not dumping it, but letting it squeeze by....did you say once stopped, the pedal will hold the car at a stop?
#21
MBWorld Fanatic!
Thread Starter
Join Date: Jul 2005
Location: Boston
Posts: 3,094
Likes: 0
Received 0 Likes
on
0 Posts
is a German Tank
#22
Junior Member
Join Date: Mar 2015
Posts: 20
Received 0 Likes
on
0 Posts
1990 W126 560SEL, 1995 W124 E420, 2000 W210 E320 wagon non 4 matic
My 1995 E420 is doing the exact same thing. I replaced Pads and bled system, am pretty sure the master cylinder is bad. I did also notice the ASR light comes on after a few minutes and the ABS pump quiets down at the same exact moment. I am going to replace master cylinder next and see if light goes out in conjunction with the replacing of Master cylinder.
#23
Junior Member
Join Date: Mar 2015
Posts: 20
Received 0 Likes
on
0 Posts
1990 W126 560SEL, 1995 W124 E420, 2000 W210 E320 wagon non 4 matic
Replaced Master cyckinder
Replaced Master cylinder , no preesuse at rear brake bled valve, I have brakes and ASR light is still on after ABS pump stops after 2 minutes or so the braking seems fine but noisy ABS pump and ASR light on I wonder if ASR pump is bad below master cylinder a little electric motor and pump one line to ABS system, Is there any good writting as to how this entire system works so that I could understand and troubleshoot?