Where to find a radiator cap

[tufsinger]

All,

My 54AD has been spitting at me when she warms up. Runs okay but squirting fluid. I believe I have it traced to the radiator cap. The seal is split and not sure how well it's holding pressure, if at all.

It may also just be a wrong-fitting cap. Surely not original unless the Brits and Germans got together in 54 to make an Audi radiator cap.

Wondering if anyone knows what caps may be a compatible replacement.

Many thanks,

-Thomas

[tvdwerf]

Is it a version with thread?
I know some other British cap will fit, I found a spare in a box with Austin parts.

Do you have pictures from the actual situation?

[Phillip]

I believe the threaded radiator cap used on the thermsyphon system in A's and 4A's was also used on various Morris cars. I've picked a few up at Beaulieu over the years. Strangely enough, it also fits the Singer Senior radiator!

The 4AD used a pressurised system with a water pump. Dave Green, our NASOC parts guy and Meisterwrench did an interchange guide for the 4AD and I suspect he may well know what cap can be used!

Dave???

[tufsinger]

Not threaded. Looks like a "normal" radiator cap. Pictures enclosed. As mentioned, it's not original but something off an Audi or similar.

Any type of workable replacement would be perfect.

Thanks

[Phillip]

That is not an original 4AD radiator from what I can see of it in the photo! Looks much more modern...