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Has the temperature where you lived warmed up lately? My theory - I would leak in the winter here in Texas because the gasket would compress in that weather, in warm weather the gasket would expand keeping fluids from leaking.
I have a 2001 4.4 e53 as well. I have had it since late 2004. I have done most of the work on it, unless it was a major item that I didn't want to spend the time doing. For about 2 years I would have occasional leaking of coolant/water mix. Sometimes the AC condensation on mine is extremely heavy but I know that is not the cause.
I have finally completed all coolant leaks, for now. The leak that I had in the exact spot you are talking about ended up being the Valley Pan gasket. One day that thing finally blew out and leaked everywhere. Another spot for a leak right there is the heater hose clamps.
The oil in the area above the spark plugs for me was a mechanic put the spark plugs back in after removing them for a repair of something on the engine without replacing the crush washers. I had oil leaking which I thought was a gasket but after putting in new spark plugs and cleaning that entire area out, the leaking stopped.
If the rear compressor for the rear suspension has not been replaced be ready for that as well as the air bags for the rear suspension to leak.
I have 228,000 miles on mine and its running like the day I purchased it.
I will continue to look at the thread, but feel free to PM me about any thing for that '01 4.4.
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04-02-2013, 01:56 PM
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