Made it about 3 miles from house this morning. when I got to stop sign, truck was shakin'. Went about another 1/8 mile to pull into a parking lot and she's a knockin/poppin'! I pulled dipstick out and smoke's commin' from tube, pcv vent, and oil fill. Noise more audible from drivers side. Well, that was a expensive 12k miles. Depending on what it is, this might be it for the diesel world for me.