I've got an '01 Ram 1500 with the 5.9 360 Magnum and have an oil leak. I know it's not the plenum as I did that already saw it was still leaking and replaced all the gaskets again but I still have a leak. It is going down the area behind my oil pan but can't tell how high it starts. What are common oil leaks on the 5.9 other than plenum?

 

Rear main seal, (which starts really low) Valve cover gaskets, but, those tend to drip down the heads, maybe oil pressure sensor. Take a look in the back there with a nice flashlight, see what you can see.

 

I replaced the valve cover gaskets while working on the plenum so will look at the other things. Thanks

 

the rear gasket for the intake by the dizzy is easily moved, just a thought.. if it is coming from that area I would say either that or the oil pressure sensor. did you RTV the corners back there when you installed the intake gaskets?