Brake Bleeding - sequence questioned
Thread Starter
Racer
Joined: Aug 2009
Posts: 342
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From: Dallas Texas
Brake Bleeding - sequence questioned
I am looking in the FSM for my 86 and it says the sequence is rear left, rear right then front left,front right. I am assuming left = drivers side. This sounds wrong to me, looking at the brake lines shouldn't it be rear right, rear left then front right, front left? thx!
Race Director
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From: Kingman AZ
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Burning Brakes
Joined: Jun 2003
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From: Niagara Falls ON
The 1986 brake lines go from the master to the ABS then to the brakes. Technically the furthest from the master cylinder would actually be the front brakes since the fluid goes from the master to the ABS behind the driver then to the front brakes.
I don't have the updates to the manual that were made available to GM dealers on this computer. They may have made corrections later. Any corrections will likely be found in the 1987 FSM.
Just my 2 cents.
I don't have the updates to the manual that were made available to GM dealers on this computer. They may have made corrections later. Any corrections will likely be found in the 1987 FSM.
Just my 2 cents.
Drifting
Joined: Jul 2009
Posts: 1,258
Likes: 99
From: Ashland PA
2021 C4 of the Year - Modified Finalist
The 1986 brake lines go from the master to the ABS then to the brakes. Technically the furthest from the master cylinder would actually be the front brakes since the fluid goes from the master to the ABS behind the driver then to the front brakes.
I don't have the updates to the manual that were made available to GM dealers on this computer. They may have made corrections later. Any corrections will likely be found in the 1987 FSM.
Just my 2 cents.
I don't have the updates to the manual that were made available to GM dealers on this computer. They may have made corrections later. Any corrections will likely be found in the 1987 FSM.
Just my 2 cents.
Team Owner
Joined: Jan 2003
Posts: 20,342
Likes: 264
From: Summerland B.C. Canada
The 1986 brake lines go from the master to the ABS then to the brakes. Technically the furthest from the master cylinder would actually be the front brakes since the fluid goes from the master to the ABS behind the driver then to the front brakes.
I don't have the updates to the manual that were made available to GM dealers on this computer. They may have made corrections later. Any corrections will likely be found in the 1987 FSM.
Just my 2 cents.
I don't have the updates to the manual that were made available to GM dealers on this computer. They may have made corrections later. Any corrections will likely be found in the 1987 FSM.
Just my 2 cents.
Melting Slicks
Joined: Feb 2005
Posts: 2,057
Likes: 5
From: Bay Shore, NY
The manual for my 85 says the same, LR, RR, LF, RF. However, I just flushed my brake fluid this weekend and used the normal sequence, furthest away from the master first. Seemed to work out fine.
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Burning Brakes
Joined: Dec 2008
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From: Morgan Hill and Marina California
The 1986 brake lines go from the master to the ABS then to the brakes. Technically the furthest from the master cylinder would actually be the front brakes since the fluid goes from the master to the ABS behind the driver then to the front brakes.
I don't have the updates to the manual that were made available to GM dealers on this computer. They may have made corrections later. Any corrections will likely be found in the 1987 FSM.
Just my 2 cents.
I don't have the updates to the manual that were made available to GM dealers on this computer. They may have made corrections later. Any corrections will likely be found in the 1987 FSM.
Just my 2 cents.
Team Owner
Joined: Dec 1999
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From: Lacey WA RVN 68-69
NCM Sinkhole Donor
with both. I have bled my brakes using different sequences and it really doesn't seem to make a difference.If for some reason the ABS unit needs servicing, then follow the sequence as shown in the FSM. And it's a royal PITA to bleed the ABS unit....
Team Owner
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Team Owner
Joined: Feb 2006
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From: San Antonio Texas
I have always questioned ALL of the procedures. I've always wondered how you could bleed the front OR the rears with the other system closed off. It would seem that the closed side, either the front or the rear would limit the stroke of the master cyl. for the side you are trying to bleed.(The fronts would get tight and not let the master cyl stroke get a full push on the rear brakes. & Viceversa) I've always opened one front and one back on the same side and bleed both at the same time. It is really easy with speed bleeders too. I've got big air bubbles out of systems that have been previously bled the "normal" way and never had any problems doing it this way. Got to keep a close eye on the master cyl level though, you can pump a LOT out quick. PS. Don't let your wife push the pedal down either. If she's like mine, she'll try to push the pedal through the firewall!
Thread Starter
Racer
Joined: Aug 2009
Posts: 342
Likes: 0
From: Dallas Texas
Thread Starter
Racer
Joined: Aug 2009
Posts: 342
Likes: 0
From: Dallas Texas
Max G’s
Joined: Nov 2008
Posts: 2,751
Likes: 79
From: Monroe OH
NCM Sinkhole Donor
In the garage, I bleed/flush both sides at the rear at the same time and then do the fronts. If at track do rr, lr, rf, and then lf. Never had any issues. Note, I normally gravity bleed.
Race Director
Joined: Jun 2004
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From: WI
If gravity bleeding (waste of time to me but can work good if you have lots of time) the angle of the car matters. I use speed bleeders and the whole process is very quick and simple, plus requires no helper or blocks of wood.
Max G’s
Joined: Nov 2008
Posts: 2,751
Likes: 79
From: Monroe OH
NCM Sinkhole Donor
Gravity bleeding only requires one person and I only gravity bleed in the garage. I do it at same time performing other inspections or fluid changes. Usually takes about 1.5 to 2hrs.
No, I would not gravity bleed at the track. It does take too long. I too use speed bleeders except when gravity bleeding. When gravity bleeding, I use stock bleeder screws with tubes attached.
No, I would not gravity bleed at the track. It does take too long. I too use speed bleeders except when gravity bleeding. When gravity bleeding, I use stock bleeder screws with tubes attached.