Oil Pump Woes
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New User
Joined: Nov 2003
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From: Woodland Wa
Oil Pump Woes
Hi all,
I have been rebuilding a '77 F250 4x4 for the last two years. Finally have rebuilt carb, brakes, and engine. I sent the tranny out and have installed it. So the big day came when I could start the truck. It started and idled very quickly, I was lucky! The problem was no oil pressure. I shut it down and removed the hose going to the new guage thinking it might be vapor locked. No change when I started it again. I pulled the passenger valve cover off and it was dry. I pulled the oil pan, primed the oil pump, re installed it and the pan, filled it with oil, pulled the distributer and put a 5/16 socket on the pump shaft and ran it with my air rachet, still no oil. Thinking maybe that was not enough I pulled the coil wire and ran the starter a few rev's, still no oil. Anybody have any ideas?
I have been rebuilding a '77 F250 4x4 for the last two years. Finally have rebuilt carb, brakes, and engine. I sent the tranny out and have installed it. So the big day came when I could start the truck. It started and idled very quickly, I was lucky! The problem was no oil pressure. I shut it down and removed the hose going to the new guage thinking it might be vapor locked. No change when I started it again. I pulled the passenger valve cover off and it was dry. I pulled the oil pan, primed the oil pump, re installed it and the pan, filled it with oil, pulled the distributer and put a 5/16 socket on the pump shaft and ran it with my air rachet, still no oil. Thinking maybe that was not enough I pulled the coil wire and ran the starter a few rev's, still no oil. Anybody have any ideas?
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New User
Joined: Nov 2003
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From: Woodland Wa
On the clearance I pretty much geussed. I tossed the old one expecting I could buy a new one. No such luck. Instead I purchased a car pick up tube and mounted it to a 1/2" union, a 1/2"x6" nipple into the pump. From the pictures in the books of the correct pick up tube and a dry fit in the pan it looks OK. Just about centered in the deep spot about 1" from the bottom. I used teflon tape on the joints to keep the suction integrity. I will have to look up the oil gallery plugs, I don't remember them off the top of my head. Last but not least. When I first spun the oil pump with the rachet I spun it the wrong way. Can this blow out the pump?
Thanks
Thanks
Posting Guru
Joined: Aug 2000
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From: PacNW
Spinning the pump the wrong way won't blow it out but it will push whatever you primed it with out into the pan. I don't know how long you're spinning it but you do have to fill the filter if you didn't when you installed it. I'd pull the filter and spin the pump with a drill (not an air ratchet - too slow) and see if oil shoots out the filter port. If it does you may have a bad filter.
Posting Legend
Joined: Sep 2001
Posts: 30,255
Likes: 37
Recheck the pickup tube connections, sounds pretty bogus to me. Teflon tape on the inlets can break off and jam the oil pump. Any leak on the inlet will destroy the pump. Do the job right the first time with the right parts.
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From: Woodland Wa
OK, figured out a way to spin pump with drill, no oil. I am pulling the oil pan now. Good point on the Teflon tape, I will use a razor and remove all exposed. As for the integrity of my homemade pick up tube, come on people it is just a pipe. Looking at photo's of the car and 4x4 pan and pick up tube the only difference is the length to the deep spot of the pan. I am pretty sure that my pick up tube will check out OK. I am going to mount it in a bucket of oil, tube and all and spin it. I will post the results later tonight or tomorrow. Thank you all for attention.
Bill
Bill
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From: illinois
new pick up tubes are still available and cheap. also rember that the longer tube needs to be supported. orginally on of the main bearing bolts had a stud on it and there was a tab on the tube to secure it. if you don't it can bounce around and actually come out of the oil. it will suck air and loose pressure.if it doen't break. the main bolt with the stud on it is still available from ford. i have the part numbers for the tube and bolt if you want it
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From: Woodland Wa
I have looked quite abit on the net, NAPA and Ford and have not found the longer pick up tube. Thanks for the info on support, I will figure something out to support it. I got sick and haven't worked on it for a week. I began removing the timing chain to ensure the oil gallery plugs are there. I talked with the machine shop, they normally install them. Thanks for the post.
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