my mk2 1.4 aex engine (saves you all asking) is becoming very noiesy at the top end mainly tappets and power has suffered greatly now im wondering how easy it is to replace the tappets as there hydrocolic and the oil was replaced with semi sythetec about two month ago before you all say oil when it was serviced there are two main questions on my mind would it be worth replacing them or getting a stage two head made up for it i know that sounds drastic but moneys tight and i cant do a whole engine swap yet