Strange Brake Bleeding Problem
#1
Registered
Thread Starter
Join Date: Aug 2002
Location: London, Ontario, Canada
Posts: 346
Likes: 0
Received 0 Likes
on
0 Posts
![Question](https://www.rx8club.com/images/icons/icon5.gif)
I'm having a strange brake bleeding issue. I may have let the master cylinder level drop too low when I removed a caliper. I'm using a vacuum bleeder. When I bleed the left rear, bubbles appear no matter how much I bleed. I don't have this problem on any other corner of the car. I assume this means the master cylinder is okay. I bled in the correct order, the right rear right before the left rear. I unscrew the bleeder <1/2 of a turn. I tried reducing it further and I still see bubbles. When the bleeder is sealed, the left rear caliper does not appear to be leaking when I pump the brakes.
Any ideas?
How much pressures should I use with the bleeder? eg. I'm using 20kpa = ~72psi
Any ideas?
How much pressures should I use with the bleeder? eg. I'm using 20kpa = ~72psi
#2
You gonna eat that?
iTrader: (1)
I'm having a strange brake bleeding issue. I may have let the master cylinder level drop too low when I removed a caliper. I'm using a vacuum bleeder. When I bleed the left rear, bubbles appear no matter how much I bleed. I don't have this problem on any other corner of the car. I assume this means the master cylinder is okay. I bled in the correct order, the right rear right before the left rear. I unscrew the bleeder <1/2 of a turn. I tried reducing it further and I still see bubbles. When the bleeder is sealed, the left rear caliper does not appear to be leaking when I pump the brakes.
Any ideas?
How much pressures should I use with the bleeder? eg. I'm using 20kpa = ~72psi
Any ideas?
How much pressures should I use with the bleeder? eg. I'm using 20kpa = ~72psi
I also put a piece of wood behind the brake pedal when bleeding the old fashioned way, the theory being the plunger in the master cylinder could get damaged by pressing the pedal further than usual.
*Did you remove both calipers? Could you have flipped them? It's been known to happen.
![Smilie](https://www.rx8club.com/images/smilies/smile.gif)
Last edited by BigCajun; 08-25-2013 at 08:00 PM.
#3
Modulated Moderator
iTrader: (3)
It likely is sucking air around the nipple....
if you have problems a pressure bleed is the way to go.....you might need to push a litre of fluid through it if you got air into your ABS pump. The master cylinders with a nipple are nice...the master can get fun to bleed bubbles in it sometimes too
if you have problems a pressure bleed is the way to go.....you might need to push a litre of fluid through it if you got air into your ABS pump. The master cylinders with a nipple are nice...the master can get fun to bleed bubbles in it sometimes too
#4
No respecter of malarkey
iTrader: (25)
I never vacuum bleed for this reason. I posted a procedure on here previously that that you do solo and is so simple. It only requires a long silicone hose and catch can, or optionally my preference is the catch bag from Speedbleeder. No need to make it more complicated with unnecessary equipment, its compact and easy to have at a race to boot.
The MC bleed nipple is only on the very early year RX8s. The MC changed along the way.
.
The MC bleed nipple is only on the very early year RX8s. The MC changed along the way.
.
Last edited by TeamRX8; 08-25-2013 at 08:14 PM.
#6
Registered
Thread Starter
Join Date: Aug 2002
Location: London, Ontario, Canada
Posts: 346
Likes: 0
Received 0 Likes
on
0 Posts
Thanks for the suggestions/thoughts. I actually removed one front caliper. I've normally had great results with vacuum bleeding, I'm not sure why it didn't work as well this time.
#7
Registered
I used a mity-vac for several years. You are almost certainly sucking air through the threads on the bleeder valve. I've had some luck putting a little Teflon tape on the valve.
Seriously, just get a pressure bleeder from Motive. It's worth the cost the first time you use it.
Seriously, just get a pressure bleeder from Motive. It's worth the cost the first time you use it.
Last edited by Mr. Pockets; 08-25-2013 at 10:38 PM.
Thread
Thread Starter
Forum
Replies
Last Post
xAgyex
Series I Trouble Shooting
19
11-13-2023 07:51 AM
Kanthinar
New Member Forum
15
12-21-2015 01:24 PM