Hi Dave,

I had one of the springs out and it went back easily.

Maybe the difference 200 to 700/900 springs is that the 900 has a short stainless sleeve up top where it sets in the slot to be staked.
If the cam & sleeve seizes then your spring is a goner that's what happened here. Do 240's have that SS sleeve on the spring?

I think hearing clicks and snaps when the door opens is the major finding.
That means the cams are frozen and judging from the old one that I'm playing with you'll need to hit it every day with a drop of MMO for days to get that grunge loosened and washed out of the cams. I put a little gear oil on the top of the cams first to get on the shoulder rivet, then packed the cams with Mobil-1 synthetic grease, being careful to seal just under the rivet heads with grease to keep the weather out.

You could swap springs if you had a used hinge, it's a non-starter to swap one out of your car, unless you need a new hobby fooling with doors all around.

The good news is Swedishcarparts has replacement springs The bad news is
it's $45 PLUS maybe $10 shipping + tax and no SS sleeve, which isn't a big
deal as you could re-use the old one.

It is good to know about in any case.

Cheers, Bill