Ordered the tool at BMW today, thought the guy would be able to look up the part but had to look it out for him. £18 or so, hopefully pick it up tomorrow and get on with it. Can't even service the Astra as the weather is crap!
Had a hand from the cat.
Bottom right corner looks worse than the rest assuming this is where it was leaking.
With the cover off the only damage I found was this. It wasn't as brittle as I expected with the spark plug bits still being flexible. I think one of the bolts wasn't as tight as the rest too.
How clean I could get it before replacing the cover.
I scrubbed up the cover and broke off all the harder parts I could. The vanos bit looks a bit manky to me.
After a quick drive I still had a few spots of oil on the previously wiped wing. I panicked but it's possibly from the fan still having some on it as I wiped it and took it a more spirited drive and it was still clean.