Join Date: Nov 2006
Location: Waterdown, Ontario
Bubbling Brake Master Cylinder
1991 Spider Veloce.
I looked at the many, many threads on brake bleeding but could not find this mentioned.
I'm still not very happy about the braking in my '91. It just take too long for my liking. I am unable to lock up the tires no matter how hard I push on the brake pedal. If you have ever had that holy sh$t moment where you needed to stop fast and couldn't, you will understand my worries.
I replaced the booster last year, but no real improvement.
I have some time on my hands today, so I decided to flush some new fluid through the brake lines.
I use speed bleeders on the calipers.
When I bled the rears, on the up stroke of the pedal, I could see a few small bubbles entering the rear of the master cylinder reservoir.
But the fronts is a totally different story.
When bleeding the fronts, on the down stroke of the brake pedal a ton of air bubbles continuously bubble up in the rear of the reservoir. I mean a ton, looks like its boiling. I could do this for 10 strokes and no change.
Both the front L and R exhibited the same behavior.
Thanks in advance for any help.
1991 Spider Veloce - Red on Tan - Rosa Bionda
1987 Spider Quadrifoglio - Red on Grey - Rosa - Sold
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Honey, this is the last thing I have to do, then I'm finished. It'll just be a minute.
Last edited by Vintre; 08-22-2019 at 03:04 PM.