Full Hydraulic Brake Master Cylinder

[Mike Allfrey]

Last weekend I attended a Rover P4 (Auntie Rover) workshop day. A very interesting day's learning about matters P4. While underneath the P4 on a hoist, the '90' model with flashing indicators, I noticed that the Girling brake master cylinder looks very similar to that used on the Javelin. Rigidly mounted, but with what looked like the same rubber boot and it made me wonder if the M/C piston would be the same as the one we know. I asked which threads were employed on the car, expecting SAE UNC and UNF, but the answer was "a mixture, with some BSF and Whitworth present too". A Rover owner needs a large tool kit.

Does anyone know if these M/C pistons are the same? Larger numbers made could reduce prices.

Getting under my Rover P6B, I sometimes consider the thought that if matters had been somewhat different, then the Jowett Javelin could have become, in later years, something similar to the Rover P6 models. Both cars are obviously properly engineered cars.

Mike A.

[Chris Spencer]

That's an interesting coincidence Mike I also own a Javelin & a P6B and yes they are both well engineered cars - then again I also think that the Citroen DS was a very clever piece of engineering