Inlet in or outlet ports?
If it's just oil Inlet side some brake cleaner and toothbrush just give it plenty of time to dry out
Inlet in or outlet ports?
If it's just oil Inlet side some brake cleaner and toothbrush just give it plenty of time to dry out
I'd probably go a little further than this.
Turn the engine so the relevant valve is shut.
Then spray brake cleaner and work old toothbrushes around.
Try to retrieve as much goo as possible using rags, not tissue.
Get it as dry as possible before moving onto the next port.
Have you diagnosed the cause of the oil?
Don't assume it is an accumulation over 13 years, it might be all recent.
Oil in inlets could be turbo, or engine breather issues, which might be engine wear.
If oil is on the exhaust side, then the inlets should be swimming for that much to get past combustion, so you'd really be in the poo. (or goo).
"Changed plugs" is this a petrol?
Whatever, cleaning the oil is not going to fix anything, you have to determine where it is coming from.
Worn piston rings, valve seals, or guides, turbo seals if it has a turbo, engine breather system, which points to worn rings.
Only one cylinder might be a leaking head gasket, or just the rings or valve seals worse on that one.
Looks like some dismantling and rectification work is needed.
If the engine is still in the vehicle, a compression check, wet and dry might help.
How did you find oil in the ports, what were you looking for, what were the symptoms/problem. We don't seem to be starting at the beginning here.