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Old 12-05-2021, 11:45 AM   #1
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7.3L V8 Oil Drain Valve

I'd like to put an oil drain vavle on my 21 F53 V8. I've done one oil change but didn't measure the plug size. It looked to be M12-1.75 or maybe 1/2" coarse thread. Can anybody verify the size? It looks like a Fumoto 107sx or a femco might physically fit but I'm concerned the threaded length of those valves is quite a bit shorter than the Ford plug. Anybody install a drain valve on this engine?
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Old 12-06-2021, 10:08 PM   #2
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I would like the answer to your question also. I emailed Fumoto directly and asked them what the correct size would be. If they get back to me, I will update the forum.
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Old 12-06-2021, 10:46 PM   #3
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Did you guys look it up on Fumoto's website? https://www.fumotousa.com/cars-picku...21-f53-7-3l-v8
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Old 12-06-2021, 11:07 PM   #4
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Quote:
Originally Posted by RRR View Post
Did you guys look it up on Fumoto's website? https://www.fumotousa.com/cars-picku...21-f53-7-3l-v8
I did check the Fumoto site & it showed a F106 valve which is M14-1.5 for this application. I ordered one of these but it wasn't the right size, too big dia and too fine threads, thus my guess at M12-1.75.
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Old 12-17-2021, 05:01 PM   #5
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Ford parts lists the gas 7.3L oil drain plug as M12 x 1.75

This means you'll want Fumoto F137N if you have high clearance

https://www.fumotousa.com/all-products/f137n.html

Or F137S if you have low clearance

https://www.fumotousa.com/all-products/f137s.html
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Old 12-17-2021, 05:08 PM   #6
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Is that oil drain plug also a level sensor/transmitter as that parts excerpt above seems to say. I just looked at mine and it looks like a plain ole plug.

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Old 12-17-2021, 05:11 PM   #7
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P/N 6730 is just a dumb plug

https://parts.ford.com/shop/en/us/en...lug-12369799-1
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Old 12-18-2021, 09:19 AM   #8
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The regular F series Fumotos wonít work because the drain is recessed into the pan, and there isnít clearance to thread the valve in. The SX series valves might work. Femco and Stahlbus type valves should work due to their design (spring loaded no rotating plug). Iím a little concerned that the threaded length of all these valves is shorter than the stock plug and the pan is cast. The longest I coul find was a Femco at 14mm & Iíve got one on order. Sorry photos inverted
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Old 12-18-2021, 05:52 PM   #9
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It looks like the Fumoto F107SX may work as it is a banjo style fitting. Hard to tell if there will be enough clearance for the valve protrusion to fit in the recess. They do list an extension so that might also be needed.

Not sure if I Like that setup, many seals/O rings with the extension.
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Old 12-19-2021, 07:29 AM   #10
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Quote:
Originally Posted by eblues View Post
The regular F series Fumotos won’t work because the drain is recessed into the pan, and there isn’t clearance to thread the valve in. The SX series valves might work. Femco and Stahlbus type valves should work due to their design (spring loaded no rotating plug). I’m a little concerned that the threaded length of all these valves is shorter than the stock plug and the pan is cast. The longest I coul find was a Femco at 14mm & I’ve got one on order. Sorry photos inverted
Thanks for that heads up. I should have looked under my coach before linking the F137 Fumoto.


The Femco looks like it will require a large 22mm socket to install. Not sure if there is room.

Hex: 22mm
Thread (D): M12x1.75
T: 14mm
A: 24mm
B: 25mm
S: 2mm


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Old 12-20-2021, 08:05 AM   #11
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If you can't find the exact fitting one can always search in places like Home Depot and find brass fittings to provide the necessary clearances and conversion of thread types so it will fit. Yes it might mean an extra fitting or two but so what. If they are brass adding some thread sealant will seal the threads and therefore be leak proof.

If you think it's sticking out too far and might get knocked off with some road debris install a metal cover in front or over it for protection.

IMHO sometimes one just has to think outside the box to make what can't work, WORK!!!
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