OK—cool enough this evening to get the convertible out of the garage and see if I can make some sense of where this air leak is. My prime suspect—Exhibit A:
…is this guy which is a tight S shape (number five in this diagram).
It has been drenched in oil and dirt for ages, since the breather hose lower connection was not held on with a spring clip. The oil and dirt you can see is after a good dose of brake cleaner. It feels spongy, although I'm unable to detect any splits or leaks from it in place. It's pretty easy to access, so I'll pop it off in the next day or so with a view to replacing it, whether it turns out to be the culprit or not…
Next up—Exhibit B:
On the face of it, this looks to be in good condition and I don't think it is causing the leak, but feeling underneath it, there is a really soft spongy feel to it. I think it's going to have to be replaced as well…
Then there's Exhibit C :
…which appears to be in good condition…
…all the way to the intercooler.
I can't get good access to the bottom of the intercooler to have a look at...
...pipe seven yet, as I ran out of time. Having said that, I can see a lot of oil and detritus down there, so it'll likely be worth replacing it as a precaution. I'll search for parts and prices this evening.
Before I go, though—can anyone explain how the battery cover is meant to work? I can see it has a spring thing on one of the terminals...
…which common-sense would say was to put some pressure onto the lid as it slots into place…
Except mine doesn't slot into place. It just floats about. Has mine been broken or something? Not a big thing, but it bugs me a little…
Cheers,
Mike😎