Yet another brake bleeding question...
Thread Starter
Racer
Joined: Aug 2002
Posts: 396
Likes: 1
From: East Hampton CT
Yet another brake bleeding question...
I've had my share of troubles over the past week or so with my brakes. I believe that I had air in the ABS portion of the braking system. Feeling a little courageous, I went out and performed a half dozen ABS stops. Now the pedal feels firmer, but still not quite as firm as I'd like. As a result, I know that I need to re-bleed each caliper.
I've read that after performing the ABS stops, don't turn off the engine while re-bleeding each caliper. What is the reason for this? I've also read to cycle the ignition from off to on. Can anyone explain either of these theories?
TIA.
P.S. I'm reluctant to bring my car to any of the local Chevy dealerships. I have not had good luck in the past.
I've read that after performing the ABS stops, don't turn off the engine while re-bleeding each caliper. What is the reason for this? I've also read to cycle the ignition from off to on. Can anyone explain either of these theories?
TIA.
P.S. I'm reluctant to bring my car to any of the local Chevy dealerships. I have not had good luck in the past.
Team Owner
Joined: Sep 2001
Posts: 23,283
Likes: 906
From: Lake Elsinore, CA
I've heard that turning or keeping the ignition on keeps the ABS module activated and allows you to bleed it with the rest of the system but it's never been confirmed. I would think the ABS valves would remain closed anyway unless they were actually functioning.
Safety Car
Joined: Sep 2001
Posts: 4,411
Likes: 1
From: Wilmington NC
Originally Posted by Chris@SpeedDemon
You will bleed all day long if you don't have the key in the on position. Do that and reblead and you should be set.
Good luck,
Good luck,
Chris,
What happens with the key on? I bleed the system, and others, quite frequently with the key off and always get a very firm pedal. I haven't seen anything in the manual about leaving the ignition on?
Burning Brakes
Joined: Dec 2001
Posts: 1,244
Likes: 13
From: Laguna Woods, CA
Originally Posted by Richin Chicago
Chris,
What happens with the key on? I bleed the system, and others, quite frequently with the key off and always get a very firm pedal. I haven't seen anything in the manual about leaving the ignition on?
What happens with the key on? I bleed the system, and others, quite frequently with the key off and always get a very firm pedal. I haven't seen anything in the manual about leaving the ignition on?
Team Owner
Joined: Sep 2001
Posts: 23,283
Likes: 906
From: Lake Elsinore, CA
You do have to have the ignition on when you perform the ABS automated bleed with the Tech II tool. But that's the only place Helm's instructs to turn the ignition on. In the manual and pressure bleeding procedures, the sm instructs you to leave the ignition off.
Safety Car
Joined: Sep 2001
Posts: 4,411
Likes: 1
From: Wilmington NC
Originally Posted by Patches
You do have to have the ignition on when you perform the ABS automated bleed with the Tech II tool. But that's the only place Helm's instructs to turn the ignition on. In the manual and pressure bleeding procedures, the sm instructs you to leave the ignition off.
Melting Slicks
Joined: Jan 2003
Posts: 3,251
Likes: 4
Originally Posted by HeadsUp
P.S. I'm reluctant to bring my car to any of the local Chevy dealerships. I have not had good luck in the past.
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Team Owner
Joined: Mar 2001
Posts: 21,325
Likes: 3,841
From: small town in S.E Pa. PA
St. Jude Donor '03-'04
With a pair of reading glasses, a Helm's Manuel , a large hammer, a fingernail file, and some bubblishous gum you can do way more than most dealerships..
OH yeah and a monkey wrench
You chew the gum ... gezzzzzzzzzzzz
OH yeah and a monkey wrench
You chew the gum ... gezzzzzzzzzzzz
Le Mans Master
Joined: Sep 1999
Posts: 7,393
Likes: 7
From: Los Angeles CA
Originally Posted by Evil-Twin
With a pair of reading glasses, a Helm's Manuel , a large hammer, a fingernail file, and some bubblishous gum you can do way more than most dealerships..
OH yeah and a monkey wrench
You chew the gum ... gezzzzzzzzzzzz
OH yeah and a monkey wrench
You chew the gum ... gezzzzzzzzzzzz
Drifting
Joined: Aug 2002
Posts: 1,258
Likes: 0
From: South
I have done 30+ bleeds/flushes on my/other Z06s with the key off, no problems.
The GM manual says on 01 and newer vettes the bleed order is rr,lf,lr and rf. on 00 and older is rr,lr,rf and lf.
Something to do with a valve in the 01+ vettes.
Then again I have seen where some bleed their 01+ vettes in the old order with no problems.
The GM manual says on 01 and newer vettes the bleed order is rr,lf,lr and rf. on 00 and older is rr,lr,rf and lf.
Something to do with a valve in the 01+ vettes.
Then again I have seen where some bleed their 01+ vettes in the old order with no problems.
Le Mans Master
Joined: Aug 2002
Posts: 8,222
Likes: 0
From: Norfolk VA
Originally Posted by drcoffee
I hate to say it, but this is a safety issue and you should take it in for service.