one more bs problem - a slight update - Page 2 - 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 10-06-2004, 04:04 PM   #11
Senior Member
True Car Nut
Thread Starter
 
Join Date: Apr 2004
Location: Three Oaks, Michigan
Posts: 4,879
Thanks: 0
Thanked 0 Times in 0 Posts
opensourceguy is on a distinguished road
Default

Quote:
Originally Posted by phoenix_flame220
When the reservoir and accumulator is run dry, you have to pressurize the fluid into the system, because it relies on pressure, not vacuum to circulate the fluid. You can either get the proper gm tool or you can stick a cork with an airhose in the top of the reservoir and force presurize it with compressed air. ghetto, but it works.
huh? you've got me..


-justin
opensourceguy is offline   Reply With Quote
Old 10-06-2004, 04:27 PM   #12
Senior Member
Posts like a Camaro
 
Join Date: Oct 2003
Location: Hamilton, Ontario
Posts: 1,074
Thanks: 0
Thanked 0 Times in 0 Posts
phoenix_flame220 is on a distinguished road
Default

You said that you are losing brake fluid. If all of the fluid is drained from the system, you can't just pour in more and expect it to suck it in, you have to prime the system by pressurizing fluid into the pump. It won't just flow in on its own.
phoenix_flame220 is offline   Reply With Quote
Old 10-06-2004, 04:50 PM   #13
Senior Member
True Car Nut
Thread Starter
 
Join Date: Apr 2004
Location: Three Oaks, Michigan
Posts: 4,879
Thanks: 0
Thanked 0 Times in 0 Posts
opensourceguy is on a distinguished road
Default

I have to replace the lines, then put in more fluid, then bleed the brakes. That will do it, right?


-justin
opensourceguy is offline   Reply With Quote
Old 10-06-2004, 07:16 PM   #14
Senior Member
Posts like a Camaro
 
Join Date: Oct 2003
Location: Hamilton, Ontario
Posts: 1,074
Thanks: 0
Thanked 0 Times in 0 Posts
phoenix_flame220 is on a distinguished road
Default

As long as you don't lose the fluid out of the pump you will probably be alright. I was able to get the GM service manual that the dealers use, when my dad and I rebuilt the epump motor. If you have to change the lines then you don't really have a choice. I wouldn't get too concerned though, if you lose the prime then you reprime it, no biggie. When you get it back together, turn on the key and you can hear the motor pressurizing the accumulator. As long as the pump shuts off after about 30 seconds then you know its fine. Iv've got the entire chapter on the teves abs system (92 pages) scanned into my computer including the diagnosis section.
phoenix_flame220 is offline   Reply With Quote
Old 10-06-2004, 07:32 PM   #15
Senior Member
True Car Nut
Thread Starter
 
Join Date: Apr 2004
Location: Three Oaks, Michigan
Posts: 4,879
Thanks: 0
Thanked 0 Times in 0 Posts
opensourceguy is on a distinguished road
Default

Good, bad, and grey news. Lets start off with the good news. Resevior was empty.. filled it up, and I had power brakes! Yay! Now onto the grey news. Can't find whatever was leaking onto the plywood.. the only lines that run near it were transmission cooler lines, and that wasn't ATF.. the lines going to the caliper are fine and dandy, replaced not too long ago too. Bad news. Noticed there was an "air" sound.. thought nothing of it, until I noticed the resevior was loosing fluid quite fast. Filled it up thinking nothing was wrong. Noticed all the sudden quite a bit of dust comming up from the rear, stopped pumping the brakes [was de-pressurizing them], and the dust stopped too. So I start pumping again, watching the back, and there was tons of crap flying up from right in front of the driver'* side rear tire. I think, oh ****, this can't be good. Look under there, FLUID EVERYWHERE!! and just leaking down, around, and just BAH! It is everywhere! It is one of the steel lines going to the rear brakes I presume, which has sprung a nasty leak. What could this be?


-justin
opensourceguy is offline   Reply With Quote
Old 10-06-2004, 08:09 PM   #16
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

That probably was it. Good thing it happened there and not on the road.
repinS is offline   Reply With Quote
Old 10-06-2004, 08:18 PM   #17
Senior Member
True Car Nut
Thread Starter
 
Join Date: Apr 2004
Location: Three Oaks, Michigan
Posts: 4,879
Thanks: 0
Thanked 0 Times in 0 Posts
opensourceguy is on a distinguished road
Default

Yeah, not too bad. Grass was dead under there anyways. Any ideas how hard this will be to fix?


-justin
opensourceguy is offline   Reply With Quote
Old 10-06-2004, 08:29 PM   #18
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

Unfortunately pal, it sounds like what my problem was right from the begining. The brake line from the MC goes into a proportioner valve located next the fuel tank. From there it splits to the 2 rear wheels. I noticed a leak, fiddled around down there, and then crumble crumble crumble. I felt like a superhero cause any metal I touched turned to dust. I spent two weeks or more trying to find the replacement lines I needed. They ended up coming from Canada. Freebees too!

Not a fun job but I was able to fix it.
randman1 is offline   Reply With Quote
Old 10-06-2004, 08:38 PM   #19
Senior Member
True Car Nut
Thread Starter
 
Join Date: Apr 2004
Location: Three Oaks, Michigan
Posts: 4,879
Thanks: 0
Thanked 0 Times in 0 Posts
opensourceguy is on a distinguished road
Default

bah.. this doesn't make me feel all that good. New ICM comming.. but no rear brakes. Do you by any chance have the lines you removed from your car? I'd just fab up the lines.. i'll never find a 'maro, and i'll never be able to get under the car at a yard. And, where you describe it being by the proportioner valve.. sound exactly where the leak is. the leak is comming right from the center. Did you need any special tools. That is my killer right there, buying tools.


-justin
opensourceguy is offline   Reply With Quote
Old 10-06-2004, 09:01 PM   #20
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

It'* like a "one thing led to another story". Only one of the lines had a leak. It'* the crossover line that runs in front of the tank to the RR wheel. When I tried to remove it from the proportioner, the line going to the LR wheel sprung a leak. There was no way to remove the two rear lines (no room for the flare nut wrench) so I cut the line going into the valve. The valve was of unknown condition so I replaced it ($65 from GMPD). The two lines of the valve were purchased from an auto parts store (I'm testing my memory... 30" line from proportioner to LR flex hose, 60"+20" from valve to RR flex hose and a union. Probably $20). Then trying to find a 20" section of the line in... I think I have gray hairs from that.

I borrowed a double flare kit to complete the work. These can be rented or borrowed from auto parts places that have loaner tool programs.

I strongly do not recommend getting the parts from a junker. I doubt you could either cause they are probably in as bad of shape as yours are in or will be soon.
randman1 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Repeating P0440/46 Codes (Update, A slight problem) PRD2BDF 1992-1999 21 10-06-2007 01:50 PM
slight surge/chugging problem acw592 2000-2005 6 01-05-2007 12:47 AM
just got a bonnie & have 1 slight problem joeshim 1992-1999 13 09-22-2005 10:12 AM
meh... one more brake problem...... FiReDeViL General GM Chat 5 10-30-2003 02:46 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 06:26 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.