Hi. Hope someone can help. I have a 1.25 zetec engine and I changed the spark plugs a couple of days ago and noticed a little oil sitting in the top of the cylinder head. I cleaned it up. Wife used the car for a couple of days and said eveything okay. I changed the oil today, took it for test drive and felt it was firing on 3.5 cylinders. Took plastic cover off cylinder head cover and noticed water (yes water), about 150ml sitting in the top of the cylinder head between plugs 3 and 4, obviously shorting the plugs. Cleaned up water and after a 10 minute drive, water has reappeared. How's it getting into the top of the cylinder and what's the cause? Appreciate your ideas.