Well this weekend we had a small go at this one .... got to be one of the most ill-treated engines I've ever had the misfortune to meet ...

Not Rubens fault he's only had it 2 months !!
Plan was to do breathers/plugs/oil change ....
Removed oil filler tube, top end absolutely crammed with gunge, but clear as a bell at the bottom... 5 minute job to clean that one .....
On removing the throttle body .. my heart plummeted, on removing the plenum and the breather pipes I was nearly in tears ....

Plan instantly changed to just breathers/oil change .... plugs/camcovers will have to be done another time.
It took Ruben nearly 20 minutes just to clean the two pipes into the breather box..

A wire coathanger (suitably bent and chopped) was needed to clear the actual rubber breather pipes before carb cleaner could even get started !!
Throttle body needed nitromors/wire wool, and on the inside of the plenum nitromors wasn't working, so we then resorted to using a power washer .....
Top breather box on the plenum was a 30 minutes effort alone ( coat hanger useful here as well ..

!!
Eventually got things better than they were but not perfect - not helped by the fact it was now persisting down ..

Started it up and there is a small air leak sby the sounds of things, but spraying the last of the carb cleaner around nothing was obvious .. press down hard on the rear of the plenum and the sound goes ... so possibly the orange injector bracket to plenum seals

we didn't have any new ones .. once slightly warmed we moved on to ....
an oil change ...
Oil was black as tar, and the filter was so full of crud it had collapsed in on itself !! A few "lumpy bits" came out with the oil but got the job done OK
I've recommended another oil /filter change in 1000 miles as I think there is a fair amount of crap in the system, he needs the cambelt doing as its overdue, and the camcovers need doing so the plugs and the possible air leak could be sorted at the same time.
So we ended cold, wet, miserable .. but hopefully the engine will run a tad sweeter and just needs a little more TLC ...