Most likely coolant leak in V8?

[ra_pro]

I am loosing coolant in my 95 540i and it's getting worse. Just casually looking at the engine bay I can't find the leak. What is the most likely place for coolant to leak in V8 and not be visible?

[e34bim]

normally the leak is is below the inlet manifold or what ever you call it over there and because its a v8 you cant see it

[e34bim]

the header is the exaust so what do you call the inlet???

[DaCan23]

water pump or hoses behind the intake manifold underneath the coolant expansion tank

[Derek A.]

Here is what is common called the valley pan. Coolant seeps from the corners and usually runs down the back of the block.

http://www.nikolasmotorsport.com/pics/v8_valleypan.jpg