I agree with the comments on the cooling system, but do you really think the valley pan gasket needs to be replaced if it has not failed? It isn't really a redundant repair from a work standpoint other than the need to drain the coolant.

My expansion tank and water pump were replaced by BMW under CPO but that was 20K miles ago. I need to do the rest over the winter when I get some time. I was planning to replace the hoses, thermostat and radiator. No sign that the valley pan gasket is failing. Not sure if there is any difference in that in a 4.6 Alpina built motor in terms of how it was assembled.

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2003 4.6is - SOLD
2003 M5 Imola
2008 Mini Cooper S
2011 Mazda CX9