Brake Bleeding Troubles

[pist0lpete]

Interesting I just happened on this thread. A couple of weeks ago I finished installing CTS-V (Gen 1) brakes on the rear. The front were installed last year. Bleeding the fronts took no time at all. But when I did the rears it took FOREVER. So much so I thought I was doing something wrong. I vacuum bled each caliper until I finally got fluid. Still no pedal. So I vacuum bled all the corners until I got fluid. No pedal. Then I did the ol' pump and hold method on all 4 corners until I finally started to get some pedal. I had to bleed nearly 2 bottles of fluid through until I could get a good pedal.

But when the car sits for a day I have to pump the pedal 2-3 times to get pressure again. I wonder if its the valve issue you spoke about earlier?

I feel like have bled at least two 32 oz bottles thru the system. Via the vacuum and the old press and hold method. Good to know I am not the only one however.

In regards to the check valve, that should only be present on the drum or drum disc master cylinders. What master are you running?

[65 Fastback]

Following.

[Barrrf]

I feel like have bled at least two 32 oz bottles thru the system. Via the vacuum and the old press and hold method. Good to know I am not the only one however.

In regards to the check valve, that should only be present on the drum or drum disc master cylinders. What master are you running?

Embarrassingly, I have no idea. I can only assume it was the stock MC that came with the car, drum/disc. I could ask the previous owner but everything he has previously told me has been false and his work on the car was less than stellar.

[pist0lpete]

Decreasing MC bore size will increase pedal travel.

Andrew

Andrew, I have definitely taken that into consideration, my concern is there is no brake feel fort he first 2-3 inches of pedal travel. I know you went to manual brakes to help with feel. Was the issue undescribed one of your complaints?

Embarrassingly, I have no idea. I can only assume it was the stock MC that came with the car, drum/disc. I could ask the previous owner but everything he has previously told me has been false and his work on the car was less than stellar.

No judgement here in didn't know my master bore. I would start by doing a little research on your master. You may need to pull the lines off and poke something in there to see if you have the valves.