Leak at base of spark plugs

[Graham Barker]

Water around the spark plugs can arise from leakage through the central hinge of the bonnet from rain or washing the car. There is a channel which connects the front grill to the back of the engine bay - see photo- which will collect the leakage and direct it away from the engine. If there are holes in the channel as a result of fittings being removed, water will drop in. I had some holes which I temporarily blocked with blutak.
The bubbles are likely to be the result of the washers on spark plugs not making a good seal.
If photo is upside down, click on it to correct that.