c6 brake bleed
Thread Starter
Heel & Toe
Joined: Aug 2005
Posts: 23
Likes: 0
From: Lake St. Louis Missouri
c6 brake bleed
I just installed my powerdercoated brake calipers from mike. They look great.
I am having problems bleeding the brakes. I started with a gravity bleed, then a manual bleed by pumping the brake pedel. The front brakes are fine, but when we pump the brake pedel and open the bleed valve the pedel will not go down, and no fluid is coming out of the bleed valve.
When I gravity bleed the brakes fluid did flow from both rear brakes. I filled the new calipers with fluid before I installed the brake line.
what next?
I am having problems bleeding the brakes. I started with a gravity bleed, then a manual bleed by pumping the brake pedel. The front brakes are fine, but when we pump the brake pedel and open the bleed valve the pedel will not go down, and no fluid is coming out of the bleed valve.
When I gravity bleed the brakes fluid did flow from both rear brakes. I filled the new calipers with fluid before I installed the brake line.
what next?
Race Director
Joined: Aug 2005
Posts: 13,592
Likes: 187
From: Hudson WI
NCM Sinkhole Donor
Start with the brake that is farthest from the master cylinder and work your way to the left front. There has to be air in the system and no fluid. Air can't come out and the fluid still be on the master cylinder.
Are you sure the master has fluid in it?
Also, make sure the bleeder screw in on the top. You may have the left on the right and the right on the left. If this is the case you will never get all the air out.
Are you sure the master has fluid in it?
Also, make sure the bleeder screw in on the top. You may have the left on the right and the right on the left. If this is the case you will never get all the air out.
Race Director
Joined: Aug 2005
Posts: 13,592
Likes: 187
From: Hudson WI
NCM Sinkhole Donor
Le Mans Master
Joined: May 2006
Posts: 8,824
Likes: 3
From: The left Coast
St. Jude Donor '08
Thread Starter
Heel & Toe
Joined: Aug 2005
Posts: 23
Likes: 0
From: Lake St. Louis Missouri
c6 brake bleed
I think you are on to something. I first tried to bleed with the engine running. Then I tried with the engine off. Could not bleed the rear brakes either way.
I test drove the car and when I pushed the brake it went almost to the floor and the ABS activated. I was only going 5 MPH. I looked in the maint. manual and it seems I would need a scanner to bleed the ABS. I may have to take it to the dealer to do this, unless someone has another way of bleeding the ABS.
I want to thank you all for the input. It has been helpful. If I don't find another way I will post the result of the dealer visit, and maybe it will help someone else.
I test drove the car and when I pushed the brake it went almost to the floor and the ABS activated. I was only going 5 MPH. I looked in the maint. manual and it seems I would need a scanner to bleed the ABS. I may have to take it to the dealer to do this, unless someone has another way of bleeding the ABS.
I want to thank you all for the input. It has been helpful. If I don't find another way I will post the result of the dealer visit, and maybe it will help someone else.
Thread Starter
Heel & Toe
Joined: Aug 2005
Posts: 23
Likes: 0
From: Lake St. Louis Missouri
c6 brake bleed
Still working on the problem. In the maint. manual it describes hooking up the scanner tool ( gm tech 2 I'm sure) and selecting "auto bleed ABS". Can this be done with another scanner like the innova 3110 OBD II scanner? Do scanners like this allow you to run procedures?
Thanks
Thanks
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Race Director
Joined: Aug 2005
Posts: 13,592
Likes: 187
From: Hudson WI
NCM Sinkhole Donor
Email Corvette Pilot. He powder coats calipers and should know the answer. You can send him a PM also, just search "Corvette Pilot".
mgolding@bellsouth.net
http://www.thepowdercoater.com
mgolding@bellsouth.net
http://www.thepowdercoater.com
Former Vendor
Joined: Aug 2005
Posts: 5,774
Likes: 0
From: Loganville GA
how much fluid did you let drain when swapping the calipers? If fluid loss was minimal, the ABS portion shouldn't be an issue. I've probably done the install 25 times now and never had a problem with the ABS and bleeding. I use a motive bleeder myself, but I have done several installs with just the foot on the pedal method, and it should work just fine.
As suggested above, did you check if they are on the correct side? 90% of the time that my customers have bleeding problems, that is the reason. Its a very easy mistake to make.
The part about opening the bleeder and not being able to get any fluid out is whats odd. Is it that way on both rear brakes? You may need to take the bleeder out completely and see if the hole got clogged in it somehow. Either that, or with the car running, open the valve and step on the brake. Full assist pressure should get it flowing if there is just a small obstruction.
As suggested above, did you check if they are on the correct side? 90% of the time that my customers have bleeding problems, that is the reason. Its a very easy mistake to make.
The part about opening the bleeder and not being able to get any fluid out is whats odd. Is it that way on both rear brakes? You may need to take the bleeder out completely and see if the hole got clogged in it somehow. Either that, or with the car running, open the valve and step on the brake. Full assist pressure should get it flowing if there is just a small obstruction.
Thread Starter
Heel & Toe
Joined: Aug 2005
Posts: 23
Likes: 0
From: Lake St. Louis Missouri
c6 brake bleed
Thanks to corvette pilot I have the fix. The rear brakes were reversed. Not hard to do I may add. after I swaped them the brakes work fine. A tip to others changing brakes would be to make sure the bleed valve is on top of the calaper. That way you will not put them on the wrong side.
Thanks to all for the help, and thanks to corvitte pilot for the beautiful powercoating.
Thanks to all for the help, and thanks to corvitte pilot for the beautiful powercoating.
Race Director
Joined: Aug 2005
Posts: 13,592
Likes: 187
From: Hudson WI
NCM Sinkhole Donor
Thanks to corvette pilot I have the fix. The rear brakes were reversed. Not hard to do I may add. after I swaped them the brakes work fine. A tip to others changing brakes would be to make sure the bleed valve is on top of the calaper. That way you will not put them on the wrong side.
Thanks to all for the help, and thanks to corvitte pilot for the beautiful powercoating.
Thanks to all for the help, and thanks to corvitte pilot for the beautiful powercoating.
Advanced
Joined: Feb 2007
Posts: 56
Likes: 0
From: Laramie WY
caliper location
Start with the brake that is farthest from the master cylinder and work your way to the left front. There has to be air in the system and no fluid. Air can't come out and the fluid still be on the master cylinder.
Are you sure the master has fluid in it?
Also, make sure the bleeder screw in on the top. You may have the left on the right and the right on the left. If this is the case you will never get all the air out.
Are you sure the master has fluid in it?
Also, make sure the bleeder screw in on the top. You may have the left on the right and the right on the left. If this is the case you will never get all the air out.
Le Mans Master
Joined: Dec 2004
Posts: 5,759
Likes: 539
From: AZ
St. Jude Donor '06-'08-'10-'11-'12-'13 '14-'15-'16-'17-'18-'19
Yep, point em up also. Think about it, you want the bubbles out of the line and the bubbles want to go up (and out) not down.
