Hi, I’m David of “Nautilia”. I’ve replaced all three arms on our 33 MkII (..and a motor, too!)
For the first replacements, I seem to remember – it was several years ago – I just pulled off the old blades, although I had to use several squirts of WD40 to loosen them from the serrated knob which sticks out of the motor’s rotor, just above the windscreen. Having loosened one of them, I took it to a car parts shop in Calais (..where we happened to be; it was just at the roundabout on the main road just before the railway station..) and they had matching length arms with similar ends which fitted the serrated rotor top, and I bought three. They were black, not chrome, but they fitted perfectly.
More recently (..two years ago?..) I wanted to re-replace one of them here in England – near Ramsgate – and took one of the original arms to a car parts shop ..hmm, was it near Ramsgate? ..it was at Herne Bay ..I’ll try to dig out the name of it in an hour or two.
They had some wiper blades for, I think, and old MG (..MG midget, perhaps..) which matched the originals exactly. So I think I bought two.
Anyway, the best thing – I found – is to use plenty of WD40 to loosen the metal blades off the metal serrated ‘stubs’ which stick out just above each windscreen, slowly but steadily pull, and the wiper arms should pull right off ..though you MAY have to squeeze just BENEATH the top of the arms to release a metal catch which may hold them onto the serrated stub.
Then just hunt at car spares shops – preferably specialist shops which hold stocks of wiper arms for ‘vintage’ cars such as old Morris Minors of MGs – and you should be able to buy a set. Buy MORE than you need ..just in case!
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