Photobucket Photobucket
Members Login
Post Info TOPIC: 68 4 piston calipers


Poncho Master!

Status: Offline
Posts: 1067
Date:
68 4 piston calipers


Just wondering if anybody has anything good OR bad about the Cardone remans on these?



__________________

.....formerly 64 Custom Sport.....now appearing as MoboMac

    Fender dice,furry skirts and flames...just say NO...

These guys really know how to do a ROCK video...

https://www.youtube.com/watch?v=Pn0w7vciQCE

 




Uber Guru

Status: Offline
Posts: 3998
Date:

Looks like it's Cardone 18-4491 (right) and 18-4492 (left).  I'm surprised they're available as it was a 2 year only item.  I wonder if the 69/70 single piston calipers (and their pertinent caliper brackets) can be used instead.



__________________
70 2+2 convertible
70 2+2 hardtop
70 Parisienne hardtop
72 GMC Sierra

 

 



Poncho Master!

Status: Online
Posts: 2536
Date:

I have heard that the 4-piston early disc brakes can be troublesome unless you get the bores sleeved properly in stainless steel by a company that known as "Vette Brakes". Pistons can get cocked in the bores and stick, plus they can leak. Sleeving them is supposed to cure those tendencies. Another thing about the 4-piston discs is that the calipers are fixed and are intolerant of rotor run-out. Later single piston floating caliper brakes are cheaper yet way more forgiving in the real world. If you are going to retain the 4-piston design, you cannot cheap out.

 

I don't know anything one way or the other about Cardone. Find out if they have stainless sleeves. If they don't, keep looking.



__________________

67 Chevelle Malibu Sport Coupe, Oshawa-built stocker 250 Powerglide 40,000 mile

Also in garage waiting: stroker 296 cid inline six & built TH350

Cameron Milne, Toronto.


I am a walking encyclopedia with numerous pages missing.



Poncho Master!

Status: Offline
Posts: 1067
Date:

As I understand it.....the single piston calipers MAY have found their way onto some late 68's...

Just got off the phone with Cardone tech....and the said they ARE stainless sleeved....

I pulled the trigger....and have a set on the way.....

Saw the thread on fitting the later rotors....which will be helpful...if needed...

__________________

.....formerly 64 Custom Sport.....now appearing as MoboMac

    Fender dice,furry skirts and flames...just say NO...

These guys really know how to do a ROCK video...

https://www.youtube.com/watch?v=Pn0w7vciQCE

 




Poncho Master!

Status: Offline
Posts: 1541
Date:

There were two problems with the 4 piston calipers, the first was corrosion, but the other was the location of the piston seal.

The 4 piston seal was located on the piston, not inside the caliper bore like the single piston style.

With the seal on the piston, any run out could cause air to enter the caliper past the seal with the resulting spongy brakes.

As mentioned, check carefully for any rotor run out.

Thanks
Randy



__________________

Sherwood Park
Alberta, Canada

1981 Parisienne 400



Guru

Status: Offline
Posts: 918
Date:

Yeah when I bought my calipers fro the 'Chief I had to replace 2 of the "o" rings but after that I never had an issue with them and I had 4 of 'em on my car. The car stopped better than my new Ram!! Plus they looked neat behind the Torque Thrust D's I had on.

__________________
"If you want sympathy- it's in the dictionary between syphilis and shit".
Page 1 of 1  sorted by
 
Quick Reply

Please log in to post quick replies.

Tweet this page Post to Digg Post to Del.icio.us
.
.
.
.