hi there!
bad news I think, jacked up the back,put half the can of seafoam in shared between all 4 bores.
after a couple of hours in which I cycled the engine twice by hand, there was no liquid in the cylinders at all. repeated with the other half the can again shared, cycled engine a couple of times and left over night.
in the morning, checked and the cylinders were damp but no liquid.
due to there being a couple of oil changes this year and me being paranoid about the pint of liquid addition to the oil which may or may not change the viscosity/ cause damage due to solvent in there,I decided just to drain the oil out and not to run it as a flush. as an extra precaution I left the drain plug out and used some budget oil to flush it out when it was empty. cleaned plastic half of oil filter housing out with carb cleaner.
changed oil filter and installed new spark plugs after cranking engine without plugs to make certain there was no liquid in cylinders, and out in brand new shell helix hx7 10w40 oil.
started up and it sounded rough and smoked like a good un but settled very quick to be much smoother and absolutely smoke free after 5 minutes. took it for a run you warm up proper and it felt much smoother.
ill see how much oil it may or may not burn within 400 miles and update.
the only question I have for more experienced folk is this, should I be concerned about the leak down of the seafoam over a couple of hours? I put about 60ml in each time.