found a bit of an oil leak while doing a service. hit the keyboard for any common failures.
to my utter shock i came across alot of people who had the engine out and head swaps as they were diagnosed as a hole in the head just above the exhaust.
one guy being told it was a burnt out exhaust valve that burnt through!! all with no performance drop.
I wasn't having any of that so i kept digging.

Eventually found a post were the cause was a terra clean!! i had one of those a year ago...
turns out the terra clean did the job and cleaned up all the carbon around the injectors and which the seals then failed on - I recently suspected inject seals, smell of fumes and ticking noise.

the holes are by design to let the gunk and oil out...

on the terra clean - still worth it I recon, car went better and returned more MPG - now to be spent on seals LOL.
no biggy i will buy a puller and do them myself.