Brake bleeding - 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.

Thread Tools Search this Thread
Old 03-30-2004, 12:17 PM   #1
Senior Member
True Car Nut
Thread Starter
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 Brake bleeding

After replacing the brake lines in the Bonnie the system was almost completely drained. My question is does the MC need to be bled before the lines or will simply bleeding the lines a sufficient number of times work?

The reason for the question is once the repairs were made, the lines were bled. Twice. Each wheel received 3 press 'n hold cycles before moving on to the next. The brake pedal dosen't feel right and the ABS begins to pulse with very little pressure applied.

Also, do these "speed bleeders" or "one man bleeder" valves work well?
randman1 is offline   Reply With Quote
Old 03-30-2004, 11:35 PM   #2
Senior Member
True Car Nut
Join Date: May 2002
Posts: 2,936
Thanks: 0
Thanked 0 Times in 0 Posts
sse1990 is on a distinguished road

I know we had issues with my system when I had lines changed. We tried to bleed it a few times and it still dindn't feel quite right. if you actually have the system chanrged up ( key on) it seemed to add alot of pressure to it and "shot" the air out of the lines. As for you MC being empty. If your system was charged up and you looked at it, it will be lower. On the MC it tells you once the car is off to pump the pedal 25 times, yes 25 times, then check the level again. It took a while but we finally got it bled.

I know that my ABS woudl kick in any time I woudl put the brakes on once I got to drive the car, but in my case it was the ABS sensor on the front drive shaft that was cracked.
sse1990 is offline   Reply With Quote
Old 03-31-2004, 12:00 AM   #3
Senior Member
Posts like a Turbo
Join Date: Apr 2003
Posts: 342
Thanks: 0
Thanked 1 Time in 1 Post
Steve LS is on a distinguished road

No pump and hold cycle. Old wanna be mechanics lore. (housewifes tale)

Get 3'-4' piece of clear 3/16'* or 1/4" fuel line. Take bleeder with you or have them try on a wheel cylinger at the store. Or measure bleeder at home. I'm just not sure what size mine is I've had it for years. You want it to fit tight on bleeder.

Start at rear wheels. put box end of wrench on bleeder.
Put hose over bleeder , glass or clear jar at other end. Once you get fluid in jar keep line submerced
Get wife or girlfriend and explain benefits to lots of pumping.
Make sure master is full and caped
Open valve and let the pumping begin
You will see the air come through the line and work its way down hose into jar.
Keep pumping until no air.
No more than 10-15 pumps before closing valve and checking/topping master you can figure that out as you go
have pedal held down while closing valve
Just let the hose and jar sit
Keep pumping until no air.
Move to next rear wheel cyl and begin again.
same deal
move to front passenger side
same deal
move to front drivers side
same deal
start all over again at first rear wheel and see if any more air shows up.
go all the way around again
If satisfied that you have no air, check pedal
If you still have problem call doctor
Never reuse brake fluid.
This is a good flush out method too.

If you have anti lock breaks
call doctor
Steve LS is offline   Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
Brake bleeding BlackBabylon 1992-1999 11 04-05-2008 05:29 PM
Brake Bleeding Hojekang 1992-1999 14 09-07-2004 09:21 PM
I need info on brake bleeding ssesc93 General GM Chat 8 02-07-2004 03:13 PM
Brake bleeding question??? Azwed General GM Chat 8 07-25-2003 05:58 PM
93 SSEi brake bleeding ?????? importeater 1992-1999 9 03-26-2003 09:52 AM

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 10:53 AM.

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 and affiliated sites.