Single Row IMSB w/ double row (shallow) IMS cover (another squeal theory)

[Steve Tinker]

BB...
Above has been half a dozen very knowlegable people giving you the same good advice - don't procede without due care & caution. And the advice is for free too.....
Now you may believe you know more than this collective brains trust and you may have plenty of money to burn on your engine, but if I were you I would think long & hard about the possible (probable) outcome of "just driving the car a bit".
It really looks like its time for some professional advice (and that's not being defeatist, just smart looking at the potential outcome). I suspect it will be a lot cheaper than the suck it and see action you are proposing.

[Bruce Wayne]

i would agree with the above... you'll have to have have some huge huevos and a wallet to match if you are going to push an engine in pain.

this might help you: Pelican Technical Article: Porsche Boxster / 996 Engine Teardown & Disassembly

yep it might mean a partial disassembly, but if you do go that route you may as well make it worthwhile.

[black_box]

So, as you may've seen in another thread, I solved the squealing issue -- it was a loose plug. I wasn't following good diagnostic procedure and wound up spending a lot of unnecessary cash. Always check the small things first!

Thanks to everyone who responded with suggestions. The car is running great now with new clutch / coils / oil / IMSB!