Before you change anything to correct a coolant leak or oil leak I suggest you clean the engine and then work from the bottom of the engine upward using a strong small beam flashlight to trace the leak from the exit point to the source. Coolant and oil leaks sources can be deceiving. Never fun to replace something and find the problem was elsewhere.

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X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas