Nope, the zetec arent hydraulic, theyre technically solid lift. Theyre simply buckets that are a spacific thickness. You "adjust" them by measuring with a feeler gauge and calculating what thickness that you need by staying within spec.
I called in my contry (Costa Rica) at the Ford mechanic and asked them if My zetec (2.0 cc, 2001, 16 valves) has hydraulic plungers because i need to know if I can adjust/calibrate them, they told me that i wasn't possible cause zetec has hidraulic.
He is confused obviously. The zetec engine is a solid lift and has to be measured to get different cam buckets. If it were hydraulic, it wouldnt need adjusting unless you had a real problem like a tappet going down. Not bragging, but i am a Mater Certified tech with Ford as well as parts dept. Trust what i tell ya. I look out for you guys a best i can.