MG
The Classic Marque

anamnesis
I started organising tours, for Sprites, Midgets, & derivatives back in 06 but I don't recall anyone using one of my tours, or the car’s participation in one of my tours, tour, to advertise a car for sale.

Different view, FWIW.

The NR valve is there to retain a vacuum in the can, on the hydraulic side of the diaphragm, to maintain assistance in the event of an engine stall as you say.

The valve _could_ be faulty, either allowing vacuum to leak away (which would need a leaky hose or a leaky NR on the inlet manifold), or be blocked. Leaky would release the brakes after a short time ...

Don't think I have leaks. Hif with a new 3 branch, and a single standard silencer Jeremy. New inlet/exaust manifold gasket. No blowing along the system I can detect, and goes fine. I'm wondering about valves, but vacuum is the same high reading on overrun as it's always been. The popping doesn't really bother me much, I just wondered what actually causes that long back note when on the overrun. I...

Dave you're assuming that the front of the diaphragm is open to atmospheric air pressure, BUT, the vacuum side of the diaphragm has one non return valve fitted to the "can", and another one fitted to the inlet manifold. They are there to maintain a vacuum and thus assist braking even if the engine has stalled. Maybe this NR valve is faulty and retaining just enough vacuum to prevent the piston val...

Look at the first image I posted on 18th May at 14:21.

When you apply the brakes the air valve opens to allow air to the back of the diaphragm, this pushes the main piston to apply enhanced pressure to the brakes, and in doing so it blocks the hole through the middle of that piston.

When you release the brakes the air valve should close sealing off the air inlet and opening the l...

I think you should get Alan to advertise your car on his trips - an active owners group is the best reason to own a classic. Are there any local events that allow or encourage vehicles for sale?

The norm would be to do it at the generator(dynamo) It's pretty simple really ,wires off and zap, wires back on. I've never had one lose it's memory in the car it's usually when they've been on the shelf or dismantled, but thinking about it yeah it would be possible I guess. As you say it doesn't do any harm, bit like shock therapy-lol

John,
International flight to Sydney, we have flight to Adelaide, road trip to Melbourne, fly to Brisbane, road trip to Cairns and then flight back to Sydney before flight back to UK from there. Just over month and still to confirm our plans once there having never been to Oz before.

Anam, last year mine started 'popping' - turned out to be the inlet/exhaust manifold failing.
It did sound good though.
What sort of silencer/s so you have?

Had another look this evening (the wheels are still locked from the last test four days ago!) This time, I undid the servo inlet pipe completely to check on Paul's last comments. Although I had done this previously, I'd only undone it a turn or two thinking that would be enough to release the pressure. However, the wheel did not release even with the union fully off. The wheel would turn only afte...