C3 General General C3 Corvette Discussion not covered in Tech
Sponsored by:
Sponsored by:

Brake ?

Thread Tools
 
Search this Thread
 
Old Nov 14, 2014 | 01:31 PM
  #1  
pauls71stingray's Avatar
pauls71stingray
Thread Starter
Instructor
 
Joined: Sep 2014
Posts: 156
Likes: 8
From: Allentown Pa.
Default Brake ?

I have a 71 4sp.with manual brakes. The entire brake system is either new or rebuilt. I can't get a good pedal. Any tricks that I'm not aware of? Thanks
Reply
Old Nov 14, 2014 | 01:39 PM
  #2  
Easy Mike's Avatar
Easy Mike
Team Owner
Supporting Lifetime
20 Year Member
 
Joined: Jun 2000
Posts: 38,923
Likes: 1,481
From: Southbound
Cruise-In II Veteran
Default

Did you bench bleed the master cylinder? On the rears, did you bleed the inner caliper halves first, then the outers.
Reply
Old Nov 14, 2014 | 01:40 PM
  #3  
MelWff's Avatar
MelWff
Race Director
20 Year Member
Liked
Loved
Community Favorite
 
Joined: May 2006
Posts: 18,649
Likes: 2,557
Default

Not sure what you mean by a "good pedal", soft/spongy indicating air is still in the system.
1. Did you bench bleed the master?
2. Did you start with the RR caliper inner bleed screw, then outter bleed screw and tap the caliper to dislodge air bubbles. Then went to LR, RF, LF?
3. Did you replace all the rubber lines?
Reply
Old Nov 14, 2014 | 02:02 PM
  #4  
pauls71stingray's Avatar
pauls71stingray
Thread Starter
Instructor
 
Joined: Sep 2014
Posts: 156
Likes: 8
From: Allentown Pa.
Default

Originally Posted by MelWff
Not sure what you mean by a "good pedal", soft/spongy indicating air is still in the system.
1. Did you bench bleed the master?
2. Did you start with the RR caliper inner bleed screw, then outter bleed screw and tap the caliper to dislodge air bubbles. Then went to LR, RF, LF?
3. Did you replace all the rubber lines?
Yes I bled the master cyl.
Yes I replaced all of the lines, rubber and metal
car still has air in the lines. It was bled by the old 1 2 3 hold method.
Reply
Old Nov 14, 2014 | 03:36 PM
  #5  
Easy Mike's Avatar
Easy Mike
Team Owner
Supporting Lifetime
20 Year Member
 
Joined: Jun 2000
Posts: 38,923
Likes: 1,481
From: Southbound
Cruise-In II Veteran
Default

Originally Posted by pauls71stingray
...car still has air in the lines...
That's the source of your spongy pedal.

Time to bleed again.
Reply
Old Nov 14, 2014 | 04:22 PM
  #6  
MelWff's Avatar
MelWff
Race Director
20 Year Member
Liked
Loved
Community Favorite
 
Joined: May 2006
Posts: 18,649
Likes: 2,557
Default More questions

Originally Posted by pauls71stingray
Yes I bled the master cyl.
Yes I replaced all of the lines, rubber and metal
car still has air in the lines. It was bled by the old 1 2 3 hold method.
You first post you were vaque as to what was rebuilt and what was replaced. Was the master rebuilt or replaced? If rebuilt what condition was the bore in?

I have always used the gravity method to bleed not sure what "1 2 3 hold" means. A helper pumps and then holds and you open the bleeder?
Reply
Old Nov 14, 2014 | 04:54 PM
  #7  
pauls71stingray's Avatar
pauls71stingray
Thread Starter
Instructor
 
Joined: Sep 2014
Posts: 156
Likes: 8
From: Allentown Pa.
Default

Originally Posted by MelWff
You first post you were vaque as to what was rebuilt and what was replaced. Was the master rebuilt or replaced? If rebuilt what condition was the bore in?

I have always used the gravity method to bleed not sure what "1 2 3 hold" means. A helper pumps and then holds and you open the bleeder?
All parts were replaced with either new or store bought rebuilt parts. Master cylinder and calipers rebuilt.

Yes a helper pumps the pedal and then holds it while you open the bleeder.

Thanks to everyone for the help!
Reply
Old Nov 14, 2014 | 05:29 PM
  #8  
C376FL's Avatar
C376FL
Racer
 
Joined: Jan 2014
Posts: 407
Likes: 14
From: Mulberry Florida
Default

Originally Posted by MelWff
You first post you were vaque as to what was rebuilt and what was replaced. Was the master rebuilt or replaced? If rebuilt what condition was the bore in?

I have always used the gravity method to bleed not sure what "1 2 3 hold" means. A helper pumps and then holds and you open the bleeder?
I agree with MelWff that gravity is the best way to bleed the brakes. I just bleed my brakes this week because of rotor run out problem. I went around the car two times, waited until the next morning and did them again. Now have a good hard pedal. Be sure to use a rubber mallet to tap the calipers to dislodge any air bubbles. Good luck
Larry
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

 Joe Kucinski
story-1

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-2

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-3

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
story-4

10 Revolutionary 'Corvette Firsts' Most People Don't Know

 Joe Kucinski
story-5

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

 Michael S. Palmer
story-6

2027 Corvette vs The World: Every C8 vs Its Closest Competitor

 Joe Kucinski
story-7

10 Most Common Corvette Problems of the Last 20 Years!

 Joe Kucinski
story-8

5 MOST and 5 LEAST Popular Corvette Model Years in History!

 Joe Kucinski
story-9

2027 Corvette Buyer's Guide: Everything You Need to Know!

 Joe Kucinski
Old Nov 14, 2014 | 05:39 PM
  #9  
Scottd's Avatar
Scottd
Drifting
10 Year Member
 
Joined: Jul 2011
Posts: 1,697
Likes: 139
From: Syracuse NY
Default

Originally Posted by pauls71stingray
All parts were replaced with either new or store bought rebuilt parts. Master cylinder and calipers rebuilt.

Yes a helper pumps the pedal and then holds it while you open the bleeder.

Thanks to everyone for the help!
Paul, just keep at it. Bleeding the brakes on these cars is one of the most popular WTF topics here on the forum. It took me the better part of a week to get mine bled. I have a very slight leak on one of my calipers now and Ive been procrastinating 8 months so far because I dont want to bleed them again.
Reply
Old Nov 15, 2014 | 11:59 PM
  #10  
doorgunner's Avatar
doorgunner
2026 Loser of the Year
Supporting Member
10 Year Member
Veteran: Army
Photogenic
Photoriffic
 
Joined: Sep 2013
Posts: 36,555
Likes: 7,006
From: New Or-leens Loo-z-anna
Default

Originally Posted by Scottd
Paul, just keep at it. Bleeding the brakes on these cars is one of the most popular WTF topics here on the forum. It took me the better part of a week to get mine bled. I have a very slight leak on one of my calipers now and Ive been procrastinating 8 months so far because I dont want to bleed them again.
So....it wasn't the brain damage or meds that caused me to bleed them 5 times after rebuilding everything (1-2-3-hold)! Of course bleeding them without replacing the 45 year old rubber hoses didn't help on the first two tries!

New hoses="New" pedal!
Reply

Get notified of new replies

To Brake ?





All times are GMT -4. The time now is 03:22 PM.

story-0
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-1
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-2
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-3
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-4
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-5
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-6
2027 Corvette vs The World: Every C8 vs Its Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-24 16:12:42


VIEW MORE
story-7
10 Most Common Corvette Problems of the Last 20 Years!

Slideshow: 10 major Corvette problems from the last 20 years.

By Joe Kucinski | 2026-04-14 16:37:05


VIEW MORE
story-8
5 MOST and 5 LEAST Popular Corvette Model Years in History!

Slideshow: 5 most and least popular Corvette model years.

By Joe Kucinski | 2026-04-08 13:25:01


VIEW MORE
story-9
2027 Corvette Buyer's Guide: Everything You Need to Know!

Slideshow: 2027 Corvette buyer's guide

By Joe Kucinski | 2026-04-17 16:41:08


VIEW MORE