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Author Topic: 69 brake calipers  (Read 3099 times)
BillOhio
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« on: September 07, 2012, 03:37:42 PM »

My z has some problems with the front calipers. The mechanic helping me is concerned the pistons are pretty rusty. I am wondering, can someone rebuild these with new pistons? I have seen kits but with no pistons.  My buddy has a set of calipers off a 69 or 70 chevelle and the pistons measure just over 2.75 inches in diameter. Would these work? we put mine back on and didnt measure them.
also,  does anyone stainless steel sleeve these like corvettes?
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1969 Z28, Burgandy, numbers matching, 12,900 miles
1967 Plymouth GTX Hemi, 4 speed, dana
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« Reply #1 on: September 07, 2012, 05:10:19 PM »

http://www.lonestarcaliper.com/

Paul
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69z28302
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« Reply #2 on: September 07, 2012, 07:11:08 PM »

Dont they just do 2 piston calipers?

Mike
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BillOhio
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« Reply #3 on: September 07, 2012, 08:03:58 PM »

That's kind of what i wondered too
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1969 Z28, Burgandy, numbers matching, 12,900 miles
1967 Plymouth GTX Hemi, 4 speed, dana
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« Reply #4 on: September 07, 2012, 09:21:10 PM »

Dont they just do 2 piston calipers?

Mike

What are two piston calipers?

Paul
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BillOhio
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« Reply #5 on: September 07, 2012, 09:54:13 PM »

69 has one piston, earlier used 2. I was browsing the classic industries catalog and they have pistons. Not sure which one is right but its a start!
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1969 Z28, Burgandy, numbers matching, 12,900 miles
1967 Plymouth GTX Hemi, 4 speed, dana
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« Reply #6 on: September 08, 2012, 03:16:20 AM »

69 has one piston, earlier used 2.

I'm confused; the disc brake calipers on my '68 Z/28 have four pistons each!   Smiley

Paul
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69z28302
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« Reply #7 on: September 08, 2012, 06:20:02 AM »

You are correct Paul LOL. 4 piston just like the Corvette . The 69 use's a single piston caliiper which I dont think Lonestar repairs .
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tmodel66
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« Reply #8 on: September 08, 2012, 09:01:53 AM »

NAPA Auto Parts has the pistons. I used their kits to rebuild mine and done them myself.
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Daniel  
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TODD
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« Reply #9 on: September 08, 2012, 09:35:01 AM »

Bill;
 Did you see the pair of calipers 5463633 dated on ebay, the buy it now of $75 a pair and he has multiple dates.
Mine are too severely pitted for a rebuild they need a sleeve. So these would be a great set if you can figure dates you have/need. 
Link here; http://www.ebay.com/itm/1969-69-CAMARO-pair-of-2-REBUILT-calipers-5463633-633-dated-Z-28-SS396-COPO-427-/140844929187?pt=Motors_Car_Truck_Parts_Accessories&hash=item20cb0310a3

Todd
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DT
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« Reply #10 on: September 08, 2012, 12:11:19 PM »

Bill;
 Did you see the pair of calipers 5463633 dated on ebay, the buy it now of $75 a pair and he has multiple dates.
Mine are too severely pitted for a rebuild they need a sleeve. So these would be a great set if you can figure dates you have/need.  
Link here; http://www.ebay.com/itm/1969-69-CAMARO-pair-of-2-REBUILT-calipers-5463633-633-dated-Z-28-SS396-COPO-427-/140844929187?pt=Motors_Car_Truck_Parts_Accessories&hash=item20cb0310a3

Todd

Thats no buy it now.  Starting bid is 75.00  Be careful of dates. There is a misconception what is casting numbers and what is manufacture dates.  
I had my calipers rebuilt by Calipers Online.  Great job. http://calipersonline.com/contact-us.aspx

Here is the link regarding date codes. http://www.yenko.net/ubbthreads/ubbthreads.php?ubb=showflat&Number=427546&Searchpage=1&Main=41719&Words=5463633&Search=true#Post427546
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Donny
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« Reply #11 on: September 08, 2012, 05:03:31 PM »

check your brake hoses first. the 69 calipers are bullit proof. a friend of mine changed both calipers, had the same problem, the found out the brake hoses had collapsed internally.
buddy
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« Reply #12 on: September 08, 2012, 05:35:11 PM »

Oops, maybe you could get them for $75.00. Donny did they resleeve your single pistons?
I haven't seen anyone specifically say they sleeve single piston units.

Todd
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NoYenko
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« Reply #13 on: September 08, 2012, 09:00:45 PM »

1969 single piston calipers have a stationary seal in the caliper bore and the piston seals against it. It really doesn't matter if the caliper has pits in it because it doesn't provide a seal.Therefore there is no need to re-sleeve it. If your pistons are pitted that's a problem that would contribute to a leak. George
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BillOhio
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« Reply #14 on: September 09, 2012, 12:57:55 AM »

Thanks guys for all the info. I had a hose go bad too. Weird deal until we found no fluid coming out hose. I will check with napa. Sometimes they still have basic parts and i forget to check there. I think my bores were ok, just rusty pistons.
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1969 Z28, Burgandy, numbers matching, 12,900 miles
1967 Plymouth GTX Hemi, 4 speed, dana
DT
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« Reply #15 on: September 09, 2012, 10:32:44 AM »

Oops, maybe you could get them for $75.00. Donny did they resleeve your single pistons?
I haven't seen anyone specifically say they sleeve single piston units.

Todd
1969 single piston calipers have a stationary seal in the caliper bore and the piston seals against it. It really doesn't matter if the caliper has pits in it because it doesn't provide a seal.Therefore there is no need to re-sleeve it. If your pistons are pitted that's a problem that would contribute to a leak. George
[
George summed it up. No sleeve.
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Donny
Hans L
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« Reply #16 on: September 10, 2012, 01:28:26 PM »

They're not that hard to rebuild yourself.   You can buy a rebuild kit from NAPA for under $20, not including the piston.

Basically:

- Use compressed air to blow out the old piston (place a piece of wood in the caliper to let the piston slam into).  Compressed air fed into the brake line hole.
- Removed the old seals
- Thereafter, I de-rusted the calipers using the electrolysis process and applied Boeshield to retain natural cast iron finish.
- Went to Harbor Freight and bought a caliper piston seal press for like $10
- Installed the new seals
- Installed the old piston as it was in good shape.

Done!  The Chevy Chassis Service Manual describes the process as well.



Date Code:  "87"






Note:  I've already chanced the bleeder cap to the lighter pale blue.
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Mike S
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« Reply #17 on: September 10, 2012, 05:55:05 PM »

 It looks soooo good when the parts are new or restored. Makes you not want to drive it now, doesn't it?

Mike
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DT
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« Reply #18 on: September 13, 2012, 07:56:07 PM »

Excellent pic on the date code Hans!!  Most guys claim the casting # is the date code.
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Donny
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« Reply #19 on: September 13, 2012, 11:57:40 PM »

After reading thsi thread, I checked the date codes on mine (while they are off), and found one with a 3 digit code, and the other with a 5 digit code...  doesn't seem to correllate iwth the infomration in the beginning of this thread..   Anyone with more information?
Gary
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Gary W.  /  69Z28-RS, 72 B 720 cowl console rosewood all tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe (2), 
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BillOhio
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« Reply #20 on: September 14, 2012, 08:57:03 AM »

Great pictures.
Napa does have pistons and the guy said it was used for a while, maybe into the 80's
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1969 Z28, Burgandy, numbers matching, 12,900 miles
1967 Plymouth GTX Hemi, 4 speed, dana
NoYenko
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« Reply #21 on: September 18, 2012, 07:57:10 PM »

Hans, Nice rebuild job & finish on the calipers. Where did you find pale blue bleeder caps? George
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Fred Mertz
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« Reply #22 on: September 18, 2012, 11:50:39 PM »

I purchased reman. calipers from NAPA auto parts a couple of years ago.  I think they $38.00 each. They had them in stock. I kept the old ones as spares.  Don't get the ones that MCB or Right Stuff sells. They will send you calipers for a Chevelle that the brake hoses won't work with.
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Hans L
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« Reply #23 on: September 20, 2012, 05:58:24 PM »

Thanks all on the feedback!

Regarding the pale blue bleeders - the originals were in good enough shape to re-use.   I just de-greased and cleaned them.  Though I think Steve's Camaro Parts & HBC sells the correct ones.  I know Rick's does not....

And yes, NAPA sells the piston, but unless it's really corroded, no need to replace it - it does not touch the cylinder walls.
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« Reply #24 on: September 21, 2012, 12:11:18 AM »

Going back to the date codes for a moment, there are 'cast dates' on the calipers, and also stamped dates:   on my two calipers from my 09C (1969) Z28,  on one caliper was a cast code of 143 (23May), with stamped date of 168 (17June).   On the other, was a cast date of 188 (7July), and a stamped date of 227 (15August).   All of these dates seem reasonable to me for calipers.   Am I interpreting the cast and stamped dates correctly?   The castings are done, then some time later, (3 to 5 weeks later in my caes), the parts are machined, the calipers built/assembled, and the assembly dates stamped in.   Note:  My '227 stamped date actually seemed to be 00227, but I interpreted it the same way?

Gary
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Gary W.  /  69Z28-RS, 72 B 720 cowl console rosewood all tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe (2), 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55 Nomad, '57 Nomad, '57 B/A Sedan
DT
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« Reply #25 on: September 27, 2012, 07:04:29 PM »

After reading thsi thread, I checked the date codes on mine (while they are off), and found one with a 3 digit code, and the other with a 5 digit code...  doesn't seem to correllate iwth the infomration in the beginning of this thread..   Anyone with more information?
Gary
What are the codes (date stamps) Huh
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Donny
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« Reply #26 on: October 01, 2012, 07:11:08 PM »

DT:   I posted the dates in the prior post to yours (but maybe you missed it?)..  "on my two calipers from my 09C (1969) Z28,  on one caliper was a cast code of 143 (23May), with stamped date of 168 (17June).   On the other, was a cast date of 188 (7July), and a stamped date of 227 (15August).   All of these dates seem reasonable to me for calipers. "
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Gary W.  /  69Z28-RS, 72 B 720 cowl console rosewood all tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe (2), 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55 Nomad, '57 Nomad, '57 B/A Sedan
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