Brake system in 87-91 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 12-13-2005, 08:56 PM   #1
Senior Member
Posts like a Corvette
Thread Starter
 
Join Date: Jul 2004
Location: Winnipeg, Manitoba, Canada
Posts: 1,445
Thanks: 0
Thanked 0 Times in 0 Posts
captainmiller is on a distinguished road
Default Brake system in 87-91

This is just a general question out of curiosity. I've noticed that the brakes on this car feel different then every other car I've ever driven. It seems that this is the only car where the pedal requires force to push down where other cars the pedal can be mashed to the floor with ease.

Take my Bonneville and our '94 Grand Am. On the Bonneville, the pedal has resistance and stops according to how hard you press it. On the Grand Am, the pedal has no resistance, and stops according to how far down you press it, rather then how hard.

I hope I don't sound crazy, but all I know is that when I go from the Bonneville to the Grand Am, my braking is very jerky until I get used to it.

Can someone explain why this is?
captainmiller is offline   Reply With Quote
Old 12-13-2005, 09:02 PM   #2
Senior Member
True Car Nut
 
Join Date: Feb 2004
Location: Western MA
Posts: 2,708
Thanks: 0
Thanked 1 Time in 1 Post
randman1 is on a distinguished road
Default

88-90 SSEs came with the Teves brake system which is an electro-mechanical assist rather than a vacuum assist system. There is a pump and an accumulator found on the Teves that is not found on a conventional vacuum system. In time, the accumulator will need to be replaced. Most of the time, this is where the extra effort comes in. A failing pump will also cause the need for more pedal effort.

I replaced my accumulator and it had no change in the feel of the brakes... still shitty. I have a parts car that also has a Teves system. I'm going to try to swap the pump assemblies to see if that helps. Otherwise, I'm switching to a vacuum assisted system
randman1 is offline   Reply With Quote
Old 12-13-2005, 09:05 PM   #3
Senior Member
Posts like a Corvette
 
Join Date: Jun 2005
Location: Berkeley, IL
Posts: 1,596
Thanks: 0
Thanked 0 Times in 0 Posts
DarkShadow is on a distinguished road
Default Re: Brake system in 87-91

Quote:
Originally Posted by captainmiller
This is just a general question out of curiosity. I've noticed that the brakes on this car feel different then every other car I've ever driven. It seems that this is the only car where the pedal requires force to push down where other cars the pedal can be mashed to the floor with ease.

Take my Bonneville and our '94 Grand Am. On the Bonneville, the pedal has resistance and stops according to how hard you press it. On the Grand Am, the pedal has no resistance, and stops according to how far down you press it, rather then how hard.

I hope I don't sound crazy, but all I know is that when I go from the Bonneville to the Grand Am, my braking is very jerky until I get used to it.

Can someone explain why this is?
i dont know if your condition is normal because on mine the pedal can be pushed to the floor with ease, more ease than the other cars ive owned/have maybe your master cylinder is headed south, old brake calipers have caused harder pedals on a few cars ive worked on including the bonne, reman ones from autozone are like $9 with a $11 core, never had a problem with them

also the fact that our systems are different than every other one on the road today because they are electronic and not vacuum boosted, which makes for a different feel probably. i personally love the teves system and the way it feels in my car. someone else should know more about it tho
DarkShadow is offline   Reply With Quote
Old 12-13-2005, 09:57 PM   #4
Senior Member
True Car Nut
 
Join Date: Jul 2003
Location: Toronto, Ontario, Canada
Posts: 5,158
Thanks: 0
Thanked 0 Times in 0 Posts
repinS is on a distinguished road
Default

My pedal, even with the non-TEVES system, quite frankly, feels like crap. My braking when switching TO the Bonneville after driving the Altima or whatever other car is herky-jerky.


The pedal is spongy/mushy at the beginning of travel, you put your foot down... nothing, no feeling (but some resistance), nothing, nothing, and then HEY! Braking.


Basically the weighting of the pedal doesn't change enough when you start to get any significant amount of braking... it only changes under somewhere heavier than a moderate stop.
repinS is offline   Reply With Quote
Old 12-13-2005, 10:13 PM   #5
Senior Member
Posts like a Corvette
Thread Starter
 
Join Date: Jul 2004
Location: Winnipeg, Manitoba, Canada
Posts: 1,445
Thanks: 0
Thanked 0 Times in 0 Posts
captainmiller is on a distinguished road
Default

I hope nothing is wrong. The braking is consistant and smooth depending on how hard you push, and I like the way it feels. If you push down hard your face will go through the windshield no problem. On top of that, when the tires are about to lock the ABS kicks in and does its job as it should.

I like it much better then the cars where the pedal just drops to the floor. I like having that pressure on the pedal to judge my stopping. If it is failing I hope the parts aren't too pricey to fix it...
captainmiller is offline   Reply With Quote
Old 12-13-2005, 11:52 PM   #6
Senior Member
True Car Nut
 
Join Date: Jul 2003
Location: Toronto, Ontario, Canada
Posts: 5,158
Thanks: 0
Thanked 0 Times in 0 Posts
repinS is on a distinguished road
Default

Quote:
Originally Posted by captainmiller
I hope nothing is wrong. The braking is consistant and smooth depending on how hard you push, and I like the way it feels. If you push down hard your face will go through the windshield no problem. On top of that, when the tires are about to lock the ABS kicks in and does its job as it should.
I'd hope not either, but this characteristic has been around for as long as we've had the car. Braking power isn't an issue, my brother was driving the car today and had to do a 110km/h panic stop. It just feels really crappy doing it.
repinS is offline   Reply With Quote
Old 12-14-2005, 08:53 AM   #7
BANNED
 
Join Date: Aug 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
banned3800 is on a distinguished road
Default

With the Bosch Brake system you should be able to easily plant the brake pedal to the floor... Freaked me out the first couple of times I drove the 89-90 Bonnevilles and Caddiliacs with that system... But you get used to it in a hurry...

The 91-99 systems are diffrent, and act like regular vacume assisted brakes untill the EBCM or EBTCM see wheel slip, then you get the pulsing....

All I can say is that first 89 SSE I drove was interesting the first time around, hit the brakes and said OH **** .... Then the car stoped

__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
banned3800 is offline   Reply With Quote
Old 12-14-2005, 01:37 PM   #8
Senior Member
Certified GM nut
 
Join Date: Feb 2004
Location: CT
Posts: 2,099
Thanks: 0
Thanked 1 Time in 1 Post
SSEBONNE4EVA is on a distinguished road
Default brakes

you'll find that brake pads, adjusters, rotors, and the bleeding of the system all contribute to brake feel.
When I bought the 90 SSE the brakes felt hard and seemed to glide when stopped.
Installed the first set of carbon metallics and bled it and it was better but then ate the pads.
Found that the caliper slides were jammed and the front rotors were worn thin and flexing under braking.
Installed new Auto Zone rotors ($10), got free replacement pads, and fixxed the caliper slides and she stops like a dream now with excellent brake feel.
Pads are showing hardly no wear in 4 yrs now.
SSEBONNE4EVA is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Scrapping Monsoon System for MA Audio System Draystan Audio (and aftermarket electronics) 7 03-16-2011 04:33 AM
'03 Bonneville Monsoon speaker system vs. '07-'08 Grand Prix speaker system... Pologuy 2000-2005 2 07-26-2008 07:52 PM
ABS Brake "Auto Bleed" needed if brake system empt PaulDFixr 1992-1999 7 03-30-2007 04:28 PM
Brake System + Rear Brake Conversion wjcollier07 1987-1991 4 03-30-2006 12:16 PM
Brake Lines brake lines oh god brake lines disco_dotty 1987-1991 14 01-19-2005 08:38 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 02:13 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.