Shark Racer

My 'vette needed about 3-4 pumps to clear the lines of air on each caliper. Quite a few more pumps to actually FLUSH the line, but that's a different story!

The front calipers had some major air build-up apparently...

Is it normal to pick up just a little bit of air over time? I've had multiple caliper swaps done in the last couple years, but this is the first time I did a full fluid flush...

-Steve

stingraymaniac

maybe you have a small leak somewhere??
sometimes it can leak without any fluid coming out,only air coming in.

redwingvette

It may be time to replace the calipers and check for rotor run-out.

GTR1999

It's not normal to pick up air in the system,check runout.
gary

pace78

I don't know if you use DOT3 or DOT 4 DOT5 in your system, but if you use lower then DOT5 you have to change your brake fluid once a year.
The one of the bad properties of the brake fluid is that it attracks damp /moist ( don't know what it is in proper english). So the damp/moist that builds up in you brakesystem starts to boil because of the heat that comes free when you're braking. If water boils it gives bubbels of air, so that is one of the reasons that there comes air in your brakesystem.
Other one is if you still have the lip seals on your rake pistons in stead of
o-rings.
How much air? I don't know. It depends on how long you did't change the fluid.

Bye Rene


[Modified by pace78, 3:56 PM 4/4/2004]


[Modified by pace78, 3:58 PM 4/4/2004]

Shark Racer

The calipers aren't very old at all- the oldest is probably 5 years old max.

I have a feeling when my dad bled the air out of the brakes he didn't do it right- we pedal bled, but I doubt he used a jar and an air line- just opening and shutting the bleeders! (Yuck!)

I'll have to put it up again at the end of the autocross season and see if it picked up any air.

The brake fluid was at LEAST 5 years old, although there has been some new fluid introduced due to the caliper swaps...

-Steve