Might as well kill 2 birds with one stone then, right? A new gasket for the VP and the expandable pipe put in. Just not as pleasant of a situation when trying to fix an ongoing problem then another one pops up. I barely even drive much on the truck after inheriting it.

forgot to point out, I think my expansion tank is leaking too.

Obviously, make sure you check all your hoses and connections too. Would be a shame to do the pipe and valley pan, just to find out it was your upper radiator hose all along (or coolant tank/hose). Of course, changing the pipe and pan gasket isn't a bad thing. :D

If you get the kit from AGA it comes with a new valley pan.

Guess I lucked out tonight as I found out the leak was coming from the sensor of the lower radiator hose.

A lot less work and money to fix that one. :D

Yes sir it is.. There's a lot of corrosion on the electrical connector as well as the sensor itself, which leads me to believe that this is an ongoing issue. I've been seeing from time to time, this puddle of water usually behind the front passenger wheel, but just never thought much of it. And someone has pointed out to me that this problem could very well be the reason for the existing problem on the truck, the multiple faults and hesitation that doesn't seem to go away even after replacing the negative cable from BMW or installing a brand new Valeo alternator. This has been a battle for months to find the cause of. I sure hope this is the culprit and I will find out this weekend when the factory sensor arrives in the mail. Wish me luck guys.