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Username Post: C3 calipers. rebuild or replace?        (Topic#344735)
Jonechev 
Senior Member
Posts: 747
Jonechev
Loc: Cottage Grove,Minnesota. ...
Reg: 05-03-02
05-14-17 03:17 PM - Post#2691273    

Hi everyone. I am usually over on the 65-66 full size forums but I have a question that could probably be best answered here. I am installing the front power disc brake set up from a 79 vette on my 66 impala. The front calipers I have look to be in decent shape with the exception of one piston having a leaky seal. The pistons do not appear rusty at all. I believe they may be the stainless steel ones. I see that the rebuild kits are readily available and much cheaper than buying new calipers. Are these relatively easy to rebuild or is there hidden issues that would make buying new more sensible? Also, the master cylinder I have is for a disc/disc set up and my car is going to be disc/drum. Can I use this master cylinder or do I need to change to a different style? Did any of the earlier c3's run disk/drum set ups? Thanks in advance for any advice or info you could share. It is greatly appreciated!



 




TAT_2 
"16th Year" Silver Supporting Member, and Official CT Grim Reaper
Posts: 34605
TAT_2
Loc: "UNDER THE BOARDWALK"
Reg: 10-29-00
05-14-17 04:54 PM - Post#2691292    
    In response to Jonechev

I HATE THE 4 PISTON CALIPERS,64 TO 82,ALWAYS FRONT & REAR. SUPPOSEDLY THERE'S A IMPROVED "O" RING TYPE OPPOSED TO THAT OLD TAPERED LIP SEAL ON THE 4 PISTONS.

09 PONTIAC- VIBE
08 PONTIAC- G6
96 FURD SUPER CAB XLT 4X4
93 VETTE - 40TH ANIV RUBY RED LT1/6SPD/RAG TOP
NEXT ?


********
PREVIOUS VETTE'S 58,68,70,76,78,85,90
********


Blessed are the cross-eyed, for they will see God twice


 
raycow 
Honored Member
Posts: 26073
raycow
Loc: San Francisco, CA
Reg: 11-26-02
05-15-17 09:29 AM - Post#2691405    
    In response to Jonechev

I believe the pistons are most likely aluminum, which would explain no rust on them. However, before you lay down any money for caliper rebuilding parts, be sure to check the caliper bores for corrosion or pitting which might prevent getting a good seal.

You can use your disc/disc MC with rear drums if you install a 10 lb residual pressure valve in the line going to the rears. AFAIK, no production Corvettes of any year ever left the factory with a disc/drum setup.

Ray

There's a line between good and evil no wider than a razor's edge - D.S. James Hathaway quoting from The Night Keeper


 
Jonechev 
Senior Member
Posts: 747
Jonechev
Loc: Cottage Grove,Minnesota. ...
Reg: 05-03-02
05-15-17 12:11 PM - Post#2691428    
    In response to raycow

Thanks for the info. I am starting to lean towards just buying new ones. It sounds like these c3 brake calipers are pretty much a lousy design? I haven't heard anybody say anything good about them yet. Very disheartening. Even if I did rebuild them they would likely still leak from the sounds of it. Sounds like they do not have a good seal design. Although mention was made of a better o-ring style seal? anybody out there know anything more about them? Where does one find them if they exist? I was really looking forward to putting these "Improved" brakes in my car but they are starting to sound like they may be a bad deal. Unfortunatly I am already kind of into it so I will follow through and hope for the best.







 
TAT_2 
"16th Year" Silver Supporting Member, and Official CT Grim Reaper
Posts: 34605
TAT_2
Loc: "UNDER THE BOARDWALK"
Reg: 10-29-00
05-15-17 03:04 PM - Post#2691444    
    In response to Jonechev

http://www.cssbinc.com/images/ads/howto/fron tbrake...
-
I SOLVED MY C3 BRAKE PROBLEMS,I BOUGHT ANOTHER C4

THIS LOOKS INTRESTING THO
http://www.ecklerscorvette.com/corvette-caliper-se...

09 PONTIAC- VIBE
08 PONTIAC- G6
96 FURD SUPER CAB XLT 4X4
93 VETTE - 40TH ANIV RUBY RED LT1/6SPD/RAG TOP
NEXT ?


********
PREVIOUS VETTE'S 58,68,70,76,78,85,90
********


Blessed are the cross-eyed, for they will see God twice


 
raycow 
Honored Member
Posts: 26073
raycow
Loc: San Francisco, CA
Reg: 11-26-02
05-15-17 05:25 PM - Post#2691473    
    In response to Jonechev

I didn't mean to imply that the C3 calipers are a poor design. That same basic design was used on all years of C3 and all C2 that had discs, so a lot of them are out there. Also, a good number of those calipers outlived the Corvettes they came on and were later installed on passenger cars.

First of all, take a good close look at your caliper bores. They might not necessarily be bad. If they are, check out rebuilt calipers. Some of those have stainless sleeves installed, which means corrosion is not going to be a problem.

Ray

There's a line between good and evil no wider than a razor's edge - D.S. James Hathaway quoting from The Night Keeper


 
wagonmaster 
Senior Member
Posts: 8758
wagonmaster
Age: 68
Loc: Loganville, Ga.
Reg: 04-28-00
05-16-17 04:04 AM - Post#2691520    
    In response to raycow

I rebuilt DOZENS of those calipers back in the day and they all worked well. Some lasted longer than others (corrosion and lack of being driven). If I had to do it again I wouldn't hesitate to go with stainless calipers. I have used DOT 5 fluid in some, which doesn't allow moisture, but some didn't like the pedal "feel". DOT 3 is fine however and will live a long and happy life with the stainless caliper bores.

Hey T @!


In Memory of Mike McVeigh- The "Mad Spring Wacker" He roams the Forums of CT forever in our hearts and minds!

http://www.picturetrail.com/wagonmaster55

Joe


 
Jonechev 
Senior Member
Posts: 747
Jonechev
Loc: Cottage Grove,Minnesota. ...
Reg: 05-03-02
05-17-17 07:05 PM - Post#2691716    
    In response to raycow

Thanks for the input guys. It's much appreciated. After some thought I decided to just go ahead and buy a new set of calipers. Seems like money well spent. Takes all the guess work out of the equation too. Although I like the looks of the setup TAT-2 posted that's a bit more than I can afford at the moment. Can't wait to get them on and see how the car drives down the road!



 




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