Rear Brake Pressure Regulator

Someone pointed out the stock BMW rear brake pressure regulator was incorrectly mounted on the car. Not sure if this made much difference as it has always worked. However decided to fix this and add some adjustability if needed in future in the form of a Wilwood Brake Proportioning Valve.  The wilwood valve part number 260-12627 has M10 threads so the existing pipe fittings could be used.

Marked up the position for the first mounting hole.

First hole drilled, inserted a rivnut here.

Test fit, checking alignment for the top hole.

Both holes drilled and rivnuts inserted.

Final fit of the Wilwood valve.

The inlet and outlets are in roughly the same place as the old valve which will make moving the hardline easier.

Removed the P clip holding the pipe and added two new bends bringing the pipe up to the new valve.

View from above – it’s easy to get to and make adjustments.

The input pipe from the master cylinder is a braided flexi pipe which made installation easy. Lining the threads up too some effort as the tolerances are really close.

Close up view from above.

The final step was bleeding all four corners, replaced the fluid throughout as it had gone quite dark, photo shows the old colour. New fluid is much clearer.

Not done any testing/setup yet as it was raining all day.

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