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Old 11-21-2020, 09:59 AM   #1
wbs
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Default oil lube circuit

hello i am trying to learn the oil circuit for the modelA. i found a diagram on the web but it was too small to read or enlarge. any info/diagrams would be appreciated. i do have Andrews book but did not see it.
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Old 11-21-2020, 10:07 AM   #2
Patrick L.
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Default Re: oil lube circuit

Oil is pumped from base into valve chamber. Gravity takes over from there. Oil flowing into drip tray is picked up by the con rod dippers. Simple/ basic.
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Old 11-21-2020, 12:21 PM   #3
katy
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Default Re: oil lube circuit

Go to: http://www.palmbeachas.com/Model-A-I...ion-Manual.pdf

Figure 5, page 12
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Old 11-21-2020, 08:08 PM   #4
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Default Re: oil lube circuit

many thanks to all who repied
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Old 11-21-2020, 10:17 PM   #5
Jack Shaft
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Default Re: oil lube circuit

Ford called it "pump-splash-gravity" feed

Pump: The pump is clearly the most over engineered part on a model a...capable of almost 100 psi,it actual job is to lift the oil about 8 inches,from the oil pan to the valve chamber.

Splash: the oil pan has a dipper tray in it,providing little pools of oil for the connecting rod cups ( called dippers)to scoop oil for the rod bearing..it also creates a monsoon of oil,four rods splashing through puddles at one splash per RPM makes one hell of a rainstorm of oil.this lubes the cam lobes,lifters,timing gears.

Gravity: the oil,pumped up to the valve chamber trickles down tubes to the main bearings and cam bores.The hydrodynamic principle lifts the crankshaft on a cushion of oil. Gravity volume is high enough for the low rpm engine.splash also occurs in the valve chamber..

It is a simple and effective system ,allow it to work some before driving,on cold startups it can take 30 seconds for the valve chamber to fill..warm her up,and let her catch oil before driving.
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Old 11-22-2020, 11:18 AM   #6
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Default Re: oil lube circuit

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Gravity: the oil,pumped up to the valve chamber trickles down tubes to the main bearings and cam bores.The hydrodynamic principle lifts the crankshaft on a cushion of oil. Gravity volume is high enough for the low rpm engine.splash also occurs in the valve chamber..
There is also an "oil return" tube that returns excess oil from the rear of the valve chamber to the lower front of the block, where the oil flows into the dipper tray.

Also note that the engine sits on a slope of 3 towards the rear.
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Last edited by katy; 11-22-2020 at 11:20 AM. Reason: Addition
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Old 11-22-2020, 02:34 PM   #7
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Default Re: oil lube circuit

thanks again for diagrams and explanations
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Old 11-22-2020, 02:36 PM   #8
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Default Re: oil lube circuit

thanks again, i' got to look up a cut away view of motor
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