This is the first time posting on any site. Thought I would thank those who have gone before, especially, those who have given such great advice on valley pan, H20 pump, transmission fluid change, and last, not least the link to the Beisan site for Vanos rebuild. I have a 2002 4.4 bought in 2011 with 88K, new brakes and new front axles. I knew at 100K it would need some preventative maintenance done so I searched this and other sites for info. Had a small coolant leak and replaced the overflow but it didn't solve the problem. Coolant at bottom of bell housing seemed to indicate the valley pan so I planned a major service including: Valley pan, plugs, H20 pump, thermostat, hoses, gaskets, 02 sensors(front), both belt tensioners, crank bolt, Vanos rebuild, timing chain guides, paint valve covers, transmission fluid change, and I don't know what else. Turned out I didn't need the valley pan because three bolts on the coolant manifold were loose giving the telltale drip at the bell housing but once in did it anyway. In doing the Vanos I discovered a chipped intake cam land holding the middle seal so replaced that too! How 'bout that for my first real job on an X? Turned out great, though not without a few difficulties. After that, I went back for some more and installed the factory hitch I bought a year ago. Alls well and thanks to all who guided me.