Super hard brake pedal. Very sketchy to drive

[GNbythebay]

My brakes always gave me a problem. They Work when they want. I know all the brake lines are good. I have new front calipers/rotors/pads. The system is bled right but the pedal is super hard to push down and even when it is pushed how they barely work. I need to fix this problem ASAP! What do I need to do. The whole brake system is stock besides the front new stuff I mentioned.

 

[ScottHeidinger]

Powermaster brakes?


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[GNbythebay]

Powermaster brakes?


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Whatever came stock from factory.

 

[ScottHeidinger]

86/87


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[gsgnnut]

Power disaster malfunction. Remove p.m. replace with either vacuum booster and master or hydroboost system. Pm not worth replacing.

 

[NY Twin Turbo]

Your Powermaster wants you dead and wont stop untill you end up that way.

 

[Rick the pool guy]

Same happened to me I went with the hydroboost and it's awesome

 

[ScottHeidinger]

Most of us upgrade to vacuum. Make sure you get a brake pedal for vacuum setup. Best place for that powermaster is in a box in your garage


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[GNbythebay]

Same happened to me I went with the hydroboost and it's awesome

How hard is it to change out the poweastet to a hydro boost? I’m pretty handy under the hood. I’m no certified mechanic But is it something I could do in my garage?

 

[dank GN]

How hard is it to change out the poweastet to a hydro boost? I’m pretty handy under the hood. I’m no certified mechanic But is it something I could do in my garage?

It depends on what kinda garage you got lol I can tear my whole car apart and rebuild the motor in my 2 car garage

 

[GNbythebay]

It depends on what kinda garage you got lol I can tear my whole car apart and rebuild the motor in my 2 car garage

I have enough room to work on it but do I need any special tools or need to know anything specific while changing it out.

 

[dank GN]

I’m sure this website will have some info on it . I just swapped to vacuum brakes to never have to worry about the famous no brakes with these power masters.
http://www.vortexbuicks-etc.com/

 

[GNbythebay]

I’m sure this website will have some info on it . I just swapped to vacuum brakes to never have to worry about the famous no brakes with these power masters.
http://www.vortexbuicks-etc.com/

Is there a kit to buy to convert to vacuum or do you have to piece it all together?

 

[ScottHeidinger]

I’m sure there are probably more vendors that offer this but here is the first one that comes to mind.

https://www.kirbanperformance.com/p...OOSTER+KIT+with+VACUUM+BRAKE+PEDAL+#7625.html


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[ScottHeidinger]

They sell these to.

https://www.kirbanperformance.com/product/44195/CPB+HYDRO+BOOST+CONVERSION+KIT+#7619.html


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[ScottHeidinger]

You can post in the parts wanted or dig thru the old parts for sale section also. Sometimes you can get a deal on one that someone bought and never used in those forums. There is also the junkyard G body alternative. Not much to it.


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[Rick the pool guy]

I bought the kit from Kirban it was pretty straight forward you don't have to change the pedal the only problem I came across was I knocked the reverse light switch off the column and I broke the power steering reservoir

 

[whitehot1]

Yes, what you need to fix the brake problems forever is to convert to vacuum brakes like already suggested. I did it about 17 years ago. The only thing I've done to maintain them is change the pads and shoes when needed. Here is a link for everything you need in a complete kit to convert from one source.

https://www.kirbanperformance.com/p...OOSTER+KIT+with+VACUUM+BRAKE+PEDAL+#7625.html

 

[Dhos1]

I would say go hydro boost and don’t look back. There are plenty of kits out there. I paid about 8 hundred fir mine. Try www.talonperformance.com. I think that’s where I got mine from. Did it in my garage too.

 

[Dhos1]

Or google 1987 Buick Grand National hydroboist