That's a easy question. You will always get the air bubbles with the
mityvac, I think they come from the threads when you have the bleeder
cracked. It still bleeds the brakes fine. All you do is fill the jar 1/2
to3/4 full on each bleeder and close the bleeder while you still have a
vaccuum. The main problem I have is if the bleeder is plugged the mityvac
won't work as well as the foot on the pedal to get the fluid out. So if
your getting more air than fluid clean the bleeders.
Crash
> I tried to bleed my brakes today, using my new Mityvac for the first time
> ever. No matter how much I pumped it, I kept getting back mostly large
air
> bubbles, and the system never really bled properly. I made sure that
there
> was good sealing everywhere, and only opened the bleeder valve on the
wheel
> I was at. I had a good vacuum in the Mityvac, also. I finally went to
the
> conventional method of having someone pump the brake pedal, then hold it
> down while I opened each bleeder valve, one by one, and got the system
bled
> properly. After I was finished, and the brakes were working fine, I tried
> the Mityvac again, just to see if I still got mostly the large bubbles of
> air, and I did!! Where is this air coming from?! I know it's not coming
> from around where I have the Mityvac tubing connected to the bleeder
valve,
> because I've checked the vacuum reading, and it's good. I know I must be
> doing something wrong, but I can't figure out what it is. I would sure
like
> to use the Mityvac system to bleed hydraulic lines, because then I could
do
> it without a helper. Can anyone enlighten me?
>
> Thanks in advance!
> Bob
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