C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

Bench Bleeding Master Cylinder ?

Thread Tools
 
Search this Thread
 
Old 01-27-2007, 06:54 PM
  #1  
79vetter
Drifting
Thread Starter
 
79vetter's Avatar
 
Member Since: Feb 2005
Location: Richardson Tx.
Posts: 1,583
Likes: 0
Received 3 Likes on 2 Posts

Default Bench Bleeding Master Cylinder ?

Ok, its for my Buick- not the vette.
I bought a New one from Napa and it had the two plastic plugs with 2 hoses. These 2 plugs fit right in perfectly and the 2 hoses are coming up and around into the brake fluid.
My problem: I have been pushing in the screwdriver very slowly (bleeding) in and out - for 15 minutes. I still see tiny bubbles coming out and I can push it in the same amount as when I started.
Does it normally take this many strokes to get all the air out?
Do you know that you are done when you can't push it in more than 1/8 "?
thanks
Old 01-27-2007, 07:03 PM
  #2  
Retro78
Drifting
 
Retro78's Avatar
 
Member Since: Oct 2004
Location: Ontario
Posts: 1,259
Likes: 0
Received 7 Likes on 7 Posts

Default

Originally Posted by 79vetter
Ok, its for my Buick- not the vette.
I bought a New one from Napa and it had the two plastic plugs with 2 hoses. These 2 plugs fit right in perfectly and the 2 hoses are coming up and around into the brake fluid.
My problem: I have been pushing in the screwdriver very slowly (bleeding) in and out - for 15 minutes. I still see tiny bubbles coming out and I can push it in the same amount as when I started.
Does it normally take this many strokes to get all the air out?
Do you know that you are done when you can't push it in more than 1/8 "?
thanks
Don't be gentle...push it the full length till it bottoms. Tapping on the side also helps. You are done when there are no bubbles. Took me 30minutes.

"Do you know that you are done when you can't push it in more than 1/8 "? Answere..NO....you will always be able to push it when bench bleeding.

Last edited by Retro78; 01-27-2007 at 07:06 PM.
Old 01-28-2007, 11:45 AM
  #3  
79vetter
Drifting
Thread Starter
 
79vetter's Avatar
 
Member Since: Feb 2005
Location: Richardson Tx.
Posts: 1,583
Likes: 0
Received 3 Likes on 2 Posts

Default

It seemed like the one on the vette would get very hard to push the piston in when it was done spitting air out.
This one seem to eventually quit spitting air but the piston would not get any harder.
I also noticed a small amount of wetness at the piston bore where I was pushing it in.
I decided to mount it and bleed the brakes but it doesn't feel very good.
Could I have gotten a M/C dud?
Old 01-28-2007, 11:51 AM
  #4  
Jud Chapin
Le Mans Master
Support Corvetteforum!
 
Jud Chapin's Avatar
 
Member Since: Sep 2001
Location: Wellington, FL
Posts: 9,989
Received 417 Likes on 288 Posts
St. Jude Donor '11-'12-'13-'14-'15-'16-'17-‘18-'19-'20-'21-'22-'23-'24


Default

Originally Posted by 79vetter
It seemed like the one on the vette would get very hard to push the piston in when it was done spitting air out.
This one seem to eventually quit spitting air but the piston would not get any harder.
I also noticed a small amount of wetness at the piston bore where I was pushing it in.
I decided to mount it and bleed the brakes but it doesn't feel very good.
Could I have gotten a M/C dud?
Can you be a little more specific regarding "doesn't feel very good"? Does the pedal go to the floor, or is it spongy, etc.? Also, are you driving the car or what?
Old 01-28-2007, 11:57 AM
  #5  
79vetter
Drifting
Thread Starter
 
79vetter's Avatar
 
Member Since: Feb 2005
Location: Richardson Tx.
Posts: 1,583
Likes: 0
Received 3 Likes on 2 Posts

Default

It doesn't go to the floor but it does feel a little spongy.
The brakes don't bite until a lot of pedal travel. Just drove it around the block to test.
Old 01-28-2007, 12:23 PM
  #6  
Jud Chapin
Le Mans Master
Support Corvetteforum!
 
Jud Chapin's Avatar
 
Member Since: Sep 2001
Location: Wellington, FL
Posts: 9,989
Received 417 Likes on 288 Posts
St. Jude Donor '11-'12-'13-'14-'15-'16-'17-‘18-'19-'20-'21-'22-'23-'24


Default

Originally Posted by 79vetter
It doesn't go to the floor but it does feel a little spongy.
The brakes don't bite until a lot of pedal travel. Just drove it around the block to test.
Typical symptoms when air is present in the system. Try rebleeding in the proper sequence. I always like to gravity bleed brakes as this procedure always works for me. However, it is more time consuming.

Get notified of new replies

To Bench Bleeding Master Cylinder ?




Quick Reply: Bench Bleeding Master Cylinder ?



All times are GMT -4. The time now is 10:30 PM.