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300ci/4.9L Oiling
IF THE IMAGE IS TOO SMALL, click it.
Oil is lifted from the pan through the pickup screen & tube (sky blue) into the pump (dark red) which pushes the oil through the filter. The clean high-pressure oil (red) flows to the main galley, from which it flows to the lifter bores, main bearings (and then to the rod bearings via the crankshaft oil journals, not shown), and camshaft bearings. As each lifter (HLA) reaches the bottom of its cam lobe, its bleed hole is exposed to the main galley's high-pressure oil, which fills it (with the help of the internal spring) to adjust out all the lash from that rocker. As the lobe raises the HLA, its bleed hole is blocked, maintaining that adjustment for that stroke. Oil leaks from the top of the HLA into the pushrod and spills into the rocker arm, wetting the rocker fulcrum & valve stem. The front cam bearing leaks oil onto the crankshaft timing gear teeth & cam gear teeth. Spillage from the camshaft bearings and return oil from the head flows into the distributor bushing at low pressure. Splash (windage) from the crankshaft wets the cylinder walls, collecting in the oil rings.
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