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Drbrown · 10-04-2020, 11:28 PM

(1) I'm for dropping and cleaning the oil pan. I also use 10w-30 and change it every 1000 miles. My engine does not have a filter assembly but when changing the oil that frequently it drains out fairly clean. (2) The cotter pin hole in the pan under the clutch is there because its not unusual for the oil at the rear of the crank to leak a little which, as pointed-out, if it got in the clutch assembly could cause clutch plate to slip. I don't know if your '39 has a rear seal on the crank. I believe my '47 has a "slinger" instead, to keep the oil away from the rear of the crank. (3) Get yourself a complete oil pan gasket set which usually includes the seals. Check around Ford web sites for how to install the gaskets and seals. (4) If and when you drop the existing oil pump check the marking to see what PSI its rated for; there are two kinds out there.
(5) Replace the frozen water pump and while your at it, I'd recommend replacing both.
Please keep us posted on your progress.

10-04-2020, 11:28 PM	#7
Drbrown Senior Member Join Date: Oct 2013 Location: Glens Falls NY Posts: 1,267	Re: oil change (1) I'm for dropping and cleaning the oil pan. I also use 10w-30 and change it every 1000 miles. My engine does not have a filter assembly but when changing the oil that frequently it drains out fairly clean. (2) The cotter pin hole in the pan under the clutch is there because its not unusual for the oil at the rear of the crank to leak a little which, as pointed-out, if it got in the clutch assembly could cause clutch plate to slip. I don't know if your '39 has a rear seal on the crank. I believe my '47 has a "slinger" instead, to keep the oil away from the rear of the crank. (3) Get yourself a complete oil pan gasket set which usually includes the seals. Check around Ford web sites for how to install the gaskets and seals. (4) If and when you drop the existing oil pump check the marking to see what PSI its rated for; there are two kinds out there. (5) Replace the frozen water pump and while your at it, I'd recommend replacing both. Please keep us posted on your progress.