jeepdan wrote:
The oil pickup tube pulls oil from the pan into the oil pump. The oil pressure relief valve is located in the block and controls the oil pressure. From the pressure relief valve, oil flows through the oil-to-water cooler and then to filter. From the filter, oil flows the main oil gallery that feeds the crankshaft bearings. The crankshaft is cross-drilled to feed the connecting rod bearings.
Here's the link:
http://dl.dropbox.com/u/5447172/CRD-oil-circuit.pdfWithout reading your text, I followed the arrows and determined the same thing from the image. This is the most asinine design, sending the oil to the turbo from the main gallery and having a restrictor on the camshaft pathways? Yipes, yea - Lets starve part of the engine for oil by giving it an even tinier passage!
Its a wonder that when my turbo blew, that I didn't lose a camshaft instead of the main bearing on #1. But it's also easy to see how with the turbo leak from the main bearing, why the #1 failed first, and the #2 bearing was "in the process" right behind it. They were the first to starve for oil.
Thanks for scanning that!