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03-06-2020, 09:11 AM | #1 |
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Path of Engine Oil
Friend, Bob, is trying to follow the path of lube oil in a Model A engine. We thought we saw a diagram of where the oil goes in a running engine, but can't remember where. We know the pistons are lubed by the oil slinger, but where does the oil go otherwise. Anybody help us?
Marty |
03-06-2020, 09:33 AM | #2 |
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Re: Path of Engine Oil
Oil is pumped into the valve chamber, then flows down tubes to feed the main bearings by gravity, and the excess overflows the valve chamber and fills the dipper trough in the pan to feed the rods. Not sure what you mean by "the oil slinger". The only slinger is at the rear of the crankshaft inside the rear main bearing and serves as a barrier to prevent oil from escaping out the rear of the engine. Pistons are lubed by oil splash from the rods.
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03-06-2020, 09:34 AM | #3 |
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Re: Path of Engine Oil
Marty send me an email and I will send you a presentation I did re oil flow: [email protected]
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Bob Bidonde |
03-06-2020, 09:43 AM | #4 |
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Re: Path of Engine Oil
I think the slinger Marty is referring to dippers on the rods? They do sling oil around and lube the cylinder walls. As far as flow path goes, the A is one of the simplest.
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03-06-2020, 09:51 AM | #5 |
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Re: Path of Engine Oil
gravity and splash system,its like a monsoon in the crankcase.the greatest engineering overkill in a model a is the oil pump,capable of 100 psi,its used to lift the oil about 5 inches from the pan to the valve galley.
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03-06-2020, 02:14 PM | #6 |
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Re: Path of Engine Oil
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Marty |
03-06-2020, 02:38 PM | #7 |
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Re: Path of Engine Oil
The dippers likely do have cast off that lubes the cylinders & small ends of the con rods as well as cool the bottoms of the pistons but they are primarily there to lubricate the connecting rod big end journals. The dipping action actually creates a bit of oil pressure. If the mains would have been under pressure, they would last longer than they do. What's surprising is how well they last with just gravity flow.
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03-06-2020, 10:26 PM | #8 | |
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Re: Path of Engine Oil
Quote:
" AGREE " Herm. |
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03-07-2020, 12:06 AM | #9 | |
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Re: Path of Engine Oil
Quote:
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