The new master cylinder has made all the difference in the world. Surprised to see how much old fluid was still lurking in the rear pipes and cylinders, all is now flushed through with fresh fluid and the air safely expelled.

I'l see how my original discs look when Ive wire brushed off the surface rust. If they are near perfect still I will leave them as they are until the rest of the car is finished and i get it back on the road. But If they look a bit pitted or grooved I could be tempted to upgrade to the drilled discs...

Thanks. I do wonder if the mud shield/ undertray was introduced on the late RB cars to restore directed airflow to the rad otherwise lost when the radiator was moved and the sealing strip above it removed. The brackets and fixings on mine aren't in a good way so I spoke to the chap who makes the sta...

What is the thinking about drilled and slotted brake disks - are they a worthwhile upgrade. My solid disks would need an awful lot of wire brushing before i can get my 79 BGT back on the road so ive been wondering about replacing them in any event. Are the slotted disks as beneficial as they say and...

The engine mud shield on mine ended up being binned by my pal when working on the front end a couple of years ago. It went complete with it's brackets and fixings so Im not clear on what i need to buy to replace it or fit it with Could this be a good opportunity to fit a stainless steel aftermarket ...

So am i right in thinking the consensus is: bolt the new master cylinder to the servo in place of the old. Leave the switch either removed entirely or 3 1/2 turns undone. fill the reservoir with fluid connect the unions (carefully one at a time transferring from the old cylinder to limit fluid loss)...

No you are absolutely right Vic. There was a label in the way on the packaging, Ive spotted the extra bung where the switch goes now. Reading the two sections in the Haynes manual again Im still not clear if I should first bleed the brakes with the switch fitted (furthest wheel first) and then stop ...

The new tandem master cylinder has arrived, I now just need some dry weather to fit it and re bleed the brakes.

Interestingly the replacement doesnt have a pressure differential switch or a place to fit one. This will make things much simpler.

Can you say which part of the country you are in please

After wasting another 2 hours not being able to reliably bleed the rear brakes I checked it at the cylinder unions and found it is hardly putting out any fluid at all to the rear circuit though healthy at the both the fronts. A new master cylinder is now on order from.the MGB Hive.