Had my GTI serviced at the weekend. Spark plugs were replaced, purely as a matter of course at my request and on removing the coil pack (the one on the far right, near the battery) noticed that the bottom inch of the pack was light brown (i.e. rusty water marks on it) and the spark plug was also the same. Basically there has been some water down inside there at some point. It has been running perfectly though.
Anyway, replaced all the plugs and it's all running fine still.
Any ideas how water could have got down into there? All the other three were perfect. Also, the coil pack is a pretty tight fit and covered by the engine cover.
Not unduly worried as there is obviously not any water in there now and it has always run perfectly. I suggested that the maindealer may have pressure washed the engine bay before I bought it (May this year) but am still surprised that water could get in there.
Will probably get a new coil pack at somepoint anyway, although I understand that these are expensive. Any ideas on cost?
