Re: Buick Disc Brake Conversion

On Jul 23, 3:53 pm, rp...@[EMAIL PROTECTED]
 wrote:
> I just purchased and put on a disc brake conversion for a 1968-1972 GM
> A body car.  My car is an 1971 Buick GS with the 350 Stage 1.  I
> purchase the kit off of ebay from waterloo tire company out of Iowa.
> Of course it came with no instructions.  I put on the parts myself and
> could not get it to work. I took to local mechanic and he can't fiqure
> out why it won't work.  Here is a summary of what we did:
>
> Installed new bearings, spindle and rotors.  New SS braided hose.  New
> chrome power booster, master cylinder, pro****tioning valve and lines
> from mastercylinder to pro****tioning valve.  Had to get new lines to
> rear becuase could not get fittings to match.  Had new rubber brake
> hose made from front to rear.
>
> Here is what she is doing:
> When car is turned off I have hard pedal.  When cranked there is no
> pedal.  I have bench bleed master several times and power bleed it.  I
> can't get any pedal when it is cranked.  No stopping except a if not
> going fast rear brakes will lock up and gradually stop the car.  I
> plugged the master cylinder and it has hard pedal.
>
> Any suggestions on what to do?

All the posted suggestions you should look into. I have a 1972 Buick
GS I did a conversion on. By the way a Stage 1 would be a 455 engine.
You can email me direct if you need assembly diagrams or info from the
factory service manuals which I have.

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