| [GMCnet] High winds in the 403, and 455 oil pans. [message #336726] |
Tue, 04 September 2018 12:18  |
BobDunahugh
Messages: 2465
Registered: October 2010
Location: Cedar Rapids, IA
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Senior Member |
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Most owners will never even think of this. Or even know, or care. SURPRISE. I do, and have. These high winds carry the oil from the main, rod, and cam bearings. To lube the cam shaft lobes, cam chain, and the distributor shaft bearings. Then to cool the pistons. Our oil pans are very deep. As to keep the oil in the pan. From being picked up like the water on top of the waves on the ocean. We have 2 different situation going on inside our pan. 1 We have an area in our pans at the front that keep suspended oil close to the crank. That can help cause oil to stay in suspention in the crankshaft area. 2 Then our oil pans have a windage baffle on the down wind side wall of the oil pan. ( But not a windage tray )To keep oil from being blown up the side of the pan wall. And getting too much more excess oil splash in suspention to cool, and lube internal moving components. Again more reasons that GM didn't put in high volume oil pumps. Of give the main/rod bearings more clearance. To start with.
Many years ago. In an attempt to get more knowledge of the dynamics going on in the oil pan/crankcase. I built some engines that had Lexan panels built into them. Even put lights in there to improve visibility.To be able to see what was happening in the engine while in operation. Promise. Even at normal idle. The amount of oil in suspention is huge. I have one engine that it's idle is at 2200 rpm's. At 7 to 8000 RPM's It's crazy. But that's another story. The reasons that I did this. Was to get a better understanding of lubrication at low. And in the very high RPM ranges. Plus. Where can I find a 1/4th of a ft pound of torque,or a pony. I'm not into thinking, or assuming things. Bob Dunahugh 78 Royale.
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