Oil Pump
Oil Pump
Posting Guru
Joined: Dec 2002
Posts: 1,113
Likes: 0
From: Remsen, NY
If it's similar to my 351w here's what I did just a week ago:
Pull the intake manifold off the top so you have clearance, get under the truck and unscrew both motor mount nuts. Just loosen the transmission mount nuts to give it a little room to move. Jack up the motor by the oil pan enough to get a small section of 2x4 between both motor mounts and the crossmember and lower the motor onto them. That is JUST enough room to drop the pan, get your arm in there (I don't have huge arms but they're not small either) and unbolt the oil pan and pickup tube (2 bolts and 1 nut) and take the whole thing out. Once you unbolt you probably have to pull out the pump driveshaft to get the whole thing out. Clean it up good, don't use any silicone, just new gaskets. Then getting it back in is a treat. You have to put your arm in from the cutout in the back of the pan like you probably did unbolting it and lift it up just right into place, getting the driveshaft to to up into the right place in the bottom of the distributor (I did not take my distributor out, it would probably make it a lot easier). You can just put the pump shaft into the bottom of the distributor to see what it should look like. If you hook your arm around right you CAN get the pump up there and catch the nut for the pickup tube up there to hold it in place until you can thread the pump bolts. I did not use a gasket between the pump and the block, that would have been impossible to get to stay there getting the pump up there and there was no gasket there to begin with from the factory. I used the actual Ford oil pan gasket after struggling with the NAPA one. I was able to put the Ford gasket up into the cleaned up bottom face of the block and put just a couple of bolts up to hold it up. The corners that press in on either side of the crank front and back held it after the pump was buttoned up and while I took the two bolts out to get the oil pan up there. Much easier than a flexible gasket.
Why do you think your oil pump is bad?
Pull the intake manifold off the top so you have clearance, get under the truck and unscrew both motor mount nuts. Just loosen the transmission mount nuts to give it a little room to move. Jack up the motor by the oil pan enough to get a small section of 2x4 between both motor mounts and the crossmember and lower the motor onto them. That is JUST enough room to drop the pan, get your arm in there (I don't have huge arms but they're not small either) and unbolt the oil pan and pickup tube (2 bolts and 1 nut) and take the whole thing out. Once you unbolt you probably have to pull out the pump driveshaft to get the whole thing out. Clean it up good, don't use any silicone, just new gaskets. Then getting it back in is a treat. You have to put your arm in from the cutout in the back of the pan like you probably did unbolting it and lift it up just right into place, getting the driveshaft to to up into the right place in the bottom of the distributor (I did not take my distributor out, it would probably make it a lot easier). You can just put the pump shaft into the bottom of the distributor to see what it should look like. If you hook your arm around right you CAN get the pump up there and catch the nut for the pickup tube up there to hold it in place until you can thread the pump bolts. I did not use a gasket between the pump and the block, that would have been impossible to get to stay there getting the pump up there and there was no gasket there to begin with from the factory. I used the actual Ford oil pan gasket after struggling with the NAPA one. I was able to put the Ford gasket up into the cleaned up bottom face of the block and put just a couple of bolts up to hold it up. The corners that press in on either side of the crank front and back held it after the pump was buttoned up and while I took the two bolts out to get the oil pan up there. Much easier than a flexible gasket.
Why do you think your oil pump is bad?
Senior User
Joined: Jun 2004
Posts: 353
Likes: 3
From: Mid-Missouri
The pump may not be your problem. Low oil pressure can and usually is caused by worn bearings or a clogged pick-up screen.
If you've got oil pressure issues it may be too late.
Pressure (Ford Spec): 40-60 PSI @ 2000 RPM with w/ engine at operating temperature. Use a good mechanical Oil pressure guage to get this reading. Do not use an electrical guage or the Ford guage. Electrical guages are not accurate especially on older vehicles.
If you've got oil pressure issues it may be too late.
Pressure (Ford Spec): 40-60 PSI @ 2000 RPM with w/ engine at operating temperature. Use a good mechanical Oil pressure guage to get this reading. Do not use an electrical guage or the Ford guage. Electrical guages are not accurate especially on older vehicles.
