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Topic: New Front Calipers and Pads Installed - Problem bleeding/Pedal

in Forum: C3 General Discussion


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Re: New Front Calipers and Pads Installed - Problem bleeding/Pedal (16/26)
 6/12/23 11:58am
mcox8051
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Muncie, IN - USA

Vette(s):
1980 Red/Red L82, 20,700 miles. Original tires and air filter. Survivor.


Joined: 10/21/2022
Posts: 13

Sounds good but on one side I get nothing coming out, even with the hose disconnected from the steel line. I'm thinking the system, the master, and proprtion valve are vapor locked or something. 

Re: New Front Calipers and Pads Installed - Problem bleeding/Pedal (17/26)
 6/12/23 1:28pm
mcox8051
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Muncie, IN - USA

Vette(s):
1980 Red/Red L82, 20,700 miles. Original tires and air filter. Survivor.


Joined: 10/21/2022
Posts: 13

Ok up on jack stands all around. Trying gravity bleeding. I have fluid coming out of all bleeder screws! How much should I let come out to ensure the air is out?

Re: New Front Calipers and Pads Installed - Problem bleeding/Pedal (18/26)
 6/12/23 2:59pm
sdinino
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Rock Hill, SC - USA

Vette(s):
1977 White/Red


Joined: 8/2/2017
Posts: 59

For me, it was until fluid came out w no air bubbles. It’s rather slow, fluid just dribbles out rather than getting pushed out in a jet. 

I used a long clear tube off the bleeder screws so I could watch the bubbles moving.


Just make sure reservoir doesn’t run dry.  



|UPDATED|6/12/2023 12:59:48 PM (AZT)|/UPDATED|


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Re: New Front Calipers and Pads Installed - Problem bleeding/Pedal (19/26)
 6/12/23 4:33pm
F4GaryGold Member
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Grapevine, TX - USA

Vette(s):
1972 LT-1 convertible with factory air.


Joined: 8/26/2006
Posts: 1399

sdinino said:

I read lots of threads about the wonders of the Motive tool… but I also read a lot of threads from guys that couldn’t get a seal at the master. Didn’t want to spend more money on a tool that may or may not work for me. Just my $.02. 

steve



Probably because they tried to use the supplied chains and wing nuts instead of a C clamp to secure the top to the master.

I've not had a problem with it not sealing.



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Re: New Front Calipers and Pads Installed - Problem bleeding/Pedal (20/26)
 6/12/23 4:58pm
sdinino
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Rock Hill, SC - USA

Vette(s):
1977 White/Red


Joined: 8/2/2017
Posts: 59

Good to know. If (when) I have to crack open the brake system again, I will give the Motive bleeder a try.

I recall at the time I was just feeling rather raw from spending so much on replacement calipers (my second set) and many, many quarts of DOT3 🙂. Another tool seemed like a bridge too far. 



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Re: New Front Calipers and Pads Installed - Problem bleeding/Pedal (21/26)
 6/12/23 8:21pm
F4GaryGold Member
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Grapevine, TX - USA

Vette(s):
1972 LT-1 convertible with factory air.


Joined: 8/26/2006
Posts: 1399

Sometimes you just have to pay the guy.  I needed a rear decklid spring compressor to change out my springs.  I tried all the homemade suggestions and couldn't get the old ones out.  A former sponsor on here had a "home made" tool that would work.  It's 2 big washers welded to 2 pieces of  bar stock.  Looked home made but it worked.

It cost me $51 dollars for a "tool" I will never use again.



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Re: New Front Calipers and Pads Installed - Problem bleeding/Pedal (22/26)
 6/12/23 8:30pm
NorskyLifetime Member
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West Burke, VT - USA

Vette(s):
SOLD - "The Toy" - '70 Convertible
SOLD - "The Beast" - '90 ZR-1 (#682)
SOLD - "Betty" - '28 Ford Model A Tudor
Still have - "BLKBRRD" - '78 Pontiac Trans Am


Joined: 1/23/2002
Posts: 7186

Years ago I had a heck of a time getting getting a good pedal when I replaced all the calipers on "The Toy" (my homemade pressure bleeder sure got a workout on that project!).  Thankfully the local Corvette parts outfit I bought them from was good about swapping out (multiple times) what I thought were bad calipers.  Turned out it was the new master cylinder I had bought from them that was the culprit.  Swapped it out and didn't have any more issues with the brakes. 

"Mr. Apple" has pointed out many times that a new part doesn't necessarily mean it's good.



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Jim Olson 

"The Toys"...!!!  Save the Wave!

Where I've been in a Corvette...!!!

Re: New Front Calipers and Pads Installed - Problem bleeding/Pedal (23/26)
 6/13/23 3:33pm
mcox8051
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Muncie, IN - USA

Vette(s):
1980 Red/Red L82, 20,700 miles. Original tires and air filter. Survivor.


Joined: 10/21/2022
Posts: 13

UPDATE. Gravity bled all four corners. The fronts had a steady flow of drips, the rears started out dripping pretty good but then they just stopped. Haven't got the Motive yet so I used the Mightyvac on the rears, worked like a champ. I could see several bubbles coming out until it turned to all fluid. Not sure how the air got in the rears since I only changed the front calipers. Probably from pumping the pedal and it went through the propotioning valve to the back? Not sure how that all works. I now have a good firm pedal! Hallelujah! Probably return the Motive (or put it on ebay) because I don't think I will ever use it. Thanks for all the help guys!

Re: New Front Calipers and Pads Installed - Problem bleeding/Pedal (24/26)
 6/13/23 4:23pm
ishmeriev
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, - Bulgaria

Vette(s):
1981 red/camel 350/290


Joined: 5/26/2019
Posts: 1

Is the car stops in a straight line now?



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Re: New Front Calipers and Pads Installed - Problem bleeding/Pedal (25/26)
 6/13/23 5:06pm
mcox8051
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Muncie, IN - USA

Vette(s):
1980 Red/Red L82, 20,700 miles. Original tires and air filter. Survivor.


Joined: 10/21/2022
Posts: 13

I haven't put the wheels back on yet. May have spoken too soon. lol.

Re: New Front Calipers and Pads Installed - Problem bleeding/Pedal (26/26)
 6/22/23 8:43am
mcox8051
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Muncie, IN - USA

Vette(s):
1980 Red/Red L82, 20,700 miles. Original tires and air filter. Survivor.


Joined: 10/21/2022
Posts: 13

Car back together and on the road again. Brakes work perfectly. Thanks to everyone for their help!

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