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lip seal v o ring

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Steve Ference

Guest
Has anyone used both types of seal on their sleeved calipers?Do the o rings work as good as the makers say?What about on a race car, mine is driven HARD.
 

Vettehead Mikey

Well-known member
Joined
Aug 26, 2003
Messages
3,487
Location
Not that far from Ottawa
Corvette
1973 Coupe
The o-ring type seals can be of benefit if you have problems with 'air pumping' into the calipers due to bearing problems or improperly machined rotors.

Some claim that they are also less prone to leakage for cars that are stored for (very) extended periods.

My car suffers from neither of the above and I use the standard V seals. I have two calipers that were last rebuilt in 1990 and the other two in 1997. No problems so far, FWIW.
 
S

Steve Ference

Guest
Thanks Mikey, i just bought brand new calipers (not rebuilt) with new grooved
rotors and all parts are replaced regulary.I just wondered if its worth the hassle of replacing the lip seals for o ring for no performance value
 

GTR1999

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Joined
Sep 4, 2003
Messages
1,146
Location
New Haven CT
Corvette
1969,1972,1975
I have been using the lip seal calipers for 30 years. In my opinion the O rings are good if you have rotor runout issues and don't want to address them.
If you have rotor runout under .002" and spindle bearing endplay between .001-.002" you don't need O rings. If you store the car then bleed the brakes when you remove it from storage. If you store the car for more then 6 months then I can see the lip seals possibly taking a set but then a lot of seals may do the same. Long term, non-use is worse on the car,then dumping the clutch everytime you drive the car.
 

lone73

Well-known member
Joined
Sep 24, 2003
Messages
456
Location
Texas
Corvette
'73 4spd coupe, '04 6 speed coupe
Steve,
I haven't used o-ring type seals but here is an interesting article that you might want to read before you change to an o-ring.

http://www.fastcorvette.com/CaliperSchool.htm

There are apparently some performance disadvantages to using the o-ring calipers. According to the article, pedal travel is increased and piston binding could be a problem. Very interesting read whether you agree or not.

I have never had a big problem with air pumping and I am running stock rebuilt calipers from a rather cheap local parts supplier (Autozone,). Up until a few months ago my car was a daily driver. I believe that's at least partly responsible for the lack of trouble I've experienced. Since your car appears to be raced, I probably would stick to the OEM style lip seal and just figure on doing a bit more maintenance as the trade-off for the performance advantage.

Good luck with it
.
.
.
 
S

Steve Ference

Guest
Thanks lone73, thats a great article,seems the original GM designers were right all along,think ill stick with the lip seals
 
S

Steve Ference

Guest
That sounds like a simple remedy to lots of brake woes, but why are the springs there for in the first place?
 

Vettehead Mikey

Well-known member
Joined
Aug 26, 2003
Messages
3,487
Location
Not that far from Ottawa
Corvette
1973 Coupe
That sounds like a simple remedy to lots of brake woes, but why are the springs there for in the first place?

The springs keep the pads in very light contact against the rotor, as mentioned in the article. The resulting drag is the equivalent of less than 1HP, not worth worrying about.

Removing the springs to cure an air pumping situation is really a band-aid remedy, and does not address the root cause.
 
S

Steve Ference

Guest
Yes Mikey i agree, i dont think removing the springs is a good idea,sorry wipeout.
 

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