MG
The Classic Marque

Anam, quite useful info, thanks for posting.

Who wins? The supermarkets of course. They and the suppliers must be rubbing their hands with glee.

You have to question the sanity of a government that puts out stuff like this while ignoring the more pressing issues of the country. As for preparing for a little wind and rain anyone would think we never had weather like this in autumn and winter before.

Trev

Official Lucas 15ACR_16ACR_17ACR_18ACR pdf.

Bernie, I can confirm the experience. When I had the back of the car lifted up to remove the axle, I (or rather the carbs) experienced a fuel overflow.
This time the car was sitting flat, though. My suspicion is that it was caused by overpressure in the gas tank in the summer heat. I had replaced the cap gasket and probably restricted the ventilation. The fuel pump stopped ticking after a whil...

Thanks Paul. I need an unthreaded base.

Found a great pdf on Lucas ACRs.

Too big to upload here.

Download from here.

https://electricalrebuilders.org/wp-content/uploads/2025/10/techbasicslucasacr.pdf

update an my engine problem, crank broke on number 1 web !!!!!!!.
I was always told con rod would not pass the bore.
Just found that late 1500 con rod big ends were machined to 71.5mm and will pass. That is on the much heavier xpeg rods.
Over 50 years on these engines, you live and learn
Ray TF 2884

I've got two older alternators.

One I think matches Flip's description of the older type. Ignore the broken lugs, I kept it for the diode pack and regulator.

Yep, I'll check the continuity of the windings, but I'd imagine it's either the reg' or rec' that's failed.

Here's a good video showing an off car alt' test; -- for those who haven't got a variable power supply.-- me. Lol...

Probably BA9 in the UK, you should be able to find a local equivalent from that. LEDs can be longer than filament bulbs, I've had that in the speedo - fouling the mechanism - until I spaced it back and found the alternatives below.

A good one in the instruments (albeit screw fitting E10 SMD 8x2020) are in the first attached but are recessed in the holders and difficult to grip. Better...

Anam
Why not check the stator and field windings on the Lucas and if they're OK put in a new rectifier and regulator (and maybe brushes).

I bet the rectifier packs are all made in China anyway. I changed the regulator in my Lucas ACR and it's kept working.