Brake problems - think I messed up

[StuP]

From your explanation, I will say again it sounds like the master is bypassing.
You say you can pump them up and get a strong pedal and hold it and it then it sinks under constant pressure ?? But you are NOT loosing fluid anywhere ?
Sounds like a bad master.
(Almost impossible to tell for sure without being there and seeing for myself - but that is my opinion as a master mechanic for more years than I got fingers and toes !! lol. )

That's what I'm thinking, pretty sure I damaged the seals on the new master, so need to start again.

 

[41mag]

That's what I'm thinking, pretty sure I damaged the seals on the new master, so need to start again.

Agreed

 

[StuP]

get a new master cylinder... you know that's what it neeeds

Yup, need ot find a decent quality aftermarket one.

 

[41mag]

Bench bleed master before putting on then gravity bleed system before you touch the pedal

 

[Bulldog Man]

From your explanation, I will say again it sounds like the master is bypassing.
You say you can pump them up and get a strong pedal and hold it and it then it sinks under constant pressure ?? But you are NOT loosing fluid anywhere ?
Sounds like a bad master.
(Almost impossible to tell for sure without being there and seeing for myself - but that is my opinion as a master mechanic for more years than I got fingers and toes !! lol. )

I agree either still got some air in the system or a master cyl I not a mechanic but do most of our own work my whole life

 

[41mag]

If you weren’t that far away I would come help you but Lilburn is a little far from Kennesaw and as of these seizure episodes I can’t even drive ! Lol

 

[41mag]

I agree either still got some air in the system or a master cyl I not a mechanic but do most of our own work my whole life

I think so too….it is easy to get air trapped in one when you replace the master.

 

[87KJH]

Here is a website for the 2013-2018 Hyundai Santa Fe service and repair manuals:

Hyundai Santa Fe: Repair procedures - Brake System - Brake System

Brake System. Brake System. Repair procedures

www.hsfmanual.com

 

[StuP]

I think so too….it is easy to get air trapped in one when you replace the master.

I'm pretty confident I bled them fine. Not soft on initial application.

 

[41mag]

I think you have a bad master ….. from the description. Hard to tell without seeing it and being there .
Good luck with it , I am going to keep up to find out problem/solution if you post it !
I hope you get to it soon, they can drive you cray cray !! lol.