The Ford Barn

Bob from Northport · 08-04-2023, 06:20 PM

I need to know what this assembly is on the drivers side of the lower engine below the oil filter. I thin it is leaking oil

Dobie Gillis · 08-04-2023, 06:45 PM

That's the oil pump. Can you tell if the pump itself is leaking, or is the leak from where the pump body meets the block?

Daves55Sedan · 08-04-2023, 08:41 PM

It's the oil pump. Could be the bushing that connects the oil pickup tube into the pump may have a worn out gasket. Also check pump-to-block gasket.
I would check mounting bolt torque recommendations for it in the shop manual and see if the bolts are tight. DOP NOT overtighten these as the bolts can bust the threads out of the block.
If threads are already busted out, you can oversize drill for the next size up threaded bushing. After drilling, tap the hole for the threads to match the bushing and screw it into the block. Then you can use your original bolt or a new replacement of same length.

Bob from Northport · 08-04-2023, 09:29 PM

Thank you gentlemen. Took me awhile looking through the manual for a picture.
Does it need to be rebuilt?? Or just gaskets/loose bolts as mentioned??
Can the assembly be remove from the block without much trouble and cleaned and checked??

fordor41 · 08-04-2023, 10:47 PM

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can't tell from the pics but if it's leaking from the end plate w/ the 4 bolts, a new O-ring may help. our '60 had a leak there and found a new O ring and that solved our leak.

08-04-2023, 06:20 PM	#1
Bob from Northport Senior Member Join Date: May 2010 Location: 215 E. 6th Street Northport, Michigan 49670 Posts: 956	54 Mercury 256 engine question I need to know what this assembly is on the drivers side of the lower engine below the oil filter. I thin it is leaking oil __________________ Bob from Northport Northport, Michigan Last edited by Bob from Northport; 02-05-2024 at 08:22 PM.

08-04-2023, 06:45 PM	#2
Dobie Gillis Senior Member Join Date: May 2012 Location: Middle TN Posts: 1,060	Re: 54 Mercury 256 engine question That's the oil pump. Can you tell if the pump itself is leaking, or is the leak from where the pump body meets the block? __________________ Often wrong but never in doubt.

08-04-2023, 08:41 PM	#3
Daves55Sedan Senior Member Join Date: May 2010 Location: Granite City, Illinois Posts: 3,008	Re: 54 Mercury 256 engine question It's the oil pump. Could be the bushing that connects the oil pickup tube into the pump may have a worn out gasket. Also check pump-to-block gasket. I would check mounting bolt torque recommendations for it in the shop manual and see if the bolts are tight. DOP NOT overtighten these as the bolts can bust the threads out of the block. If threads are already busted out, you can oversize drill for the next size up threaded bushing. After drilling, tap the hole for the threads to match the bushing and screw it into the block. Then you can use your original bolt or a new replacement of same length.

08-04-2023, 09:29 PM	#4
Bob from Northport Senior Member Join Date: May 2010 Location: 215 E. 6th Street Northport, Michigan 49670 Posts: 956	Re: 54 Mercury 256 engine question Thank you gentlemen. Took me awhile looking through the manual for a picture. Does it need to be rebuilt?? Or just gaskets/loose bolts as mentioned?? Can the assembly be remove from the block without much trouble and cleaned and checked?? __________________ Bob from Northport Northport, Michigan

08-04-2023, 10:47 PM	#5
fordor41 Senior Member Join Date: Oct 2011 Location: elmira,ny Posts: 1,527	Re: 54 Mercury 256 engine question Sponsored Links (Register now to hide all advertisements) can't tell from the pics but if it's leaking from the end plate w/ the 4 bolts, a new O-ring may help. our '60 had a leak there and found a new O ring and that solved our leak. Last edited by fordor41; 08-05-2023 at 10:32 PM.