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Ctrp 0603 Pan 03 Z

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The windage tray is a piece of sheetmetal with louvered holes stamped init. The direction of the louvers is important. Oil slung off the crankcan easily pass through the louvers into the sump, but there is noline-of-sight path between the oil in the sump and the crank. This makesit much more difficult for oil in the pan to splash back on the crank.
Working with Oil Windage

 The windage tray is a piece of sheetmetal with louvered holes stamped init. The direction of the louvers is important. Oil slung off the crankcan easily pass through the louvers into the sump, but there is noline-of-sight path between the oil in the sump and the crank. This makesit much more difficult for oil in the pan to splash back on the crank.  View Related Article