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Old 09-09-2013, 07:27 PM   #1
rymaggi
Scooby Specialist
 
Member#: 253442
Join Date: Jul 2010
Chapter/Region: BAIC
Location: El Dorado Hills / Folsom / Sac
Vehicle:
2006 V7 Sti 6speed
CGM Vf39'd Wrx Wagon

Default Mushy pedal Brembo swap onto 2006 wrx

So i have had a complete V7 STI drive train installed onto my 2006 wrx wagon.

While there were many little problems we encountered and fixed, the last thing is that when we first initially press in the brake it sinks to the floor and after that it brakes just fine.

They bled the brakes over 10 times and went through 2 bottle of DOT 4 brake fluid in the process and didn't fix the problem. There are no air leaks they can find anywhere.

The only thing we can think of is

a) Master cylinder cant handle the brakes?

b) the pads that they gave me, which are brand new, but unknown brand are garbage?

c)something could be wrong with the brembos themselves?

again they do work just fine after the first pedal push all the way to the floor.

any help would be greatly appreciated.

edit: the car also has SS lines at all four corner.
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Old 09-09-2013, 07:50 PM   #2
sc00by4life
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Member#: 97135
Join Date: Sep 2005
Chapter/Region: NWIC
Location: Bothell
Default

a.) the master cylinder should be fine. plenty have done the swap (incl myself) without issue, though an master cylinder brace is a worthy addition.

b.) pads shouldn't cause the pedal to sink to the floor on only the first depression. This would lead me to believe that there is a pressure problem somewhere in the line. Air bubbles, leak, or they were bled in the wrong order.

c.) its possible there is a leak in the unit themselves, though highly unlikely.

Re-bleed them.....something in that process isn't being done correctly, possibly the order in which they are bleeding. Also, this seems stupid to state, but they need to make sure that the pedal is FIRM before they open the valve....this means pumping the brakes a few times.

PF > DR > DF > PR.
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Old 09-09-2013, 08:06 PM   #3
rymaggi
Scooby Specialist
 
Member#: 253442
Join Date: Jul 2010
Chapter/Region: BAIC
Location: El Dorado Hills / Folsom / Sac
Vehicle:
2006 V7 Sti 6speed
CGM Vf39'd Wrx Wagon

Default

Thank you for taking the time to respond.


But! We just fixed it. For anyone else having this same problem. Remember to bleed both sides of the brembos as there is 2 nipples on the front calipers!

Also bleed the abs if needed.
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Old 09-09-2013, 08:21 PM   #4
sc00by4life
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Member#: 97135
Join Date: Sep 2005
Chapter/Region: NWIC
Location: Bothell
Default

Correct, inside first, then outside.

Glad you figured it out .
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