Replace the oil pump??
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Junior User
Joined: Dec 2002
Posts: 71
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From: Cincinnati usa
Replace the oil pump??
I have 230,000 miles on my 97 f350. When I bought the truck, I started to do oil analysis to see how the engine was doing. They reported a high lead reading which is from a main bearing. I installed an OilGuard Bypass filter to keep the oil as clean as possible. I also change the oil at 3000 miles religiously. The numbers are still slightly high but much better. I was wondering: can the oil pump be losing some of its power and still be able to run the injectors etc.? I noticed on the last oil change, the bypass filter housing was not hot as it usually is(it was in the 20's though). It made me think the oil pump doesn't have the umphh to do it all. I priced one for $82 at NAPA.
Any experience would be appreciated, and if you have changed one out, any hints etc. would be great.
Any experience would be appreciated, and if you have changed one out, any hints etc. would be great.
Postmaster
Joined: Aug 2004
Posts: 3,948
Likes: 2
From: SHELTON, WA
the oil pump in crank case pumps oil up to the hpop which goes to the injectors..why dont you plumb a oil pressure gauge first and see whats up..the most accurate spot is supposed to be on the hpop reservoir not down by the filter.
FTE Leadership Emeritus
Joined: May 2001
Posts: 13,653
Likes: 6
From: Cabot, Arkansas
As long as the low pressure pump is keeping the high pressure reservoir full it won't have a problem with the injectors.
I agree that a real oil pressure gauge would be a most helpful diagnostic tool.
If you do decide to change it, it's a gearroter style pump that mounts on the crankshaft snout, so you so not have to pull the oil pan to replace it. Just remove the radiator, pull the dampner, and unbolt the pump. Pretty straightforward stuff.
I agree that a real oil pressure gauge would be a most helpful diagnostic tool.
If you do decide to change it, it's a gearroter style pump that mounts on the crankshaft snout, so you so not have to pull the oil pan to replace it. Just remove the radiator, pull the dampner, and unbolt the pump. Pretty straightforward stuff.
Postmaster
Joined: Dec 2003
Posts: 2,864
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From: STEPHENVILLE,TX!!!!!
the pump should last the life of the motor what usually happens when it dosnt is from the pump cavitating from low oil or a loose or cracked oil pickup tube or junk in the oil and it will cut a groove in the front cover and you will experience low oil pressure when the motor is hot.
what you can do for the gauge on the top of the hpop is go to a hydraulics shop and get a -4 boss oring to 1/4 npt fitting and get a 1/4" npt tee, 1/4" npt hex head plug, 1/4"-1/8" reducing bushing and out can put one end of the long side of the tee in the top of the hpop going through the npt-boss fitting and then put the reducing bushing and your gauge in the side of the tee and then cap the other long end of the tee that would be sticking strait up. this will allow you to still check and top off hpop and have a good place for a gauge or gauge sender. i had mine setup like this untill i put the electric fuel system in. i ended up milling a flat spot in my hpop and putting my oil pressure switch for the fuel pump and pressure sender in the new location and putting the factory plug back in the hole.
what you can do for the gauge on the top of the hpop is go to a hydraulics shop and get a -4 boss oring to 1/4 npt fitting and get a 1/4" npt tee, 1/4" npt hex head plug, 1/4"-1/8" reducing bushing and out can put one end of the long side of the tee in the top of the hpop going through the npt-boss fitting and then put the reducing bushing and your gauge in the side of the tee and then cap the other long end of the tee that would be sticking strait up. this will allow you to still check and top off hpop and have a good place for a gauge or gauge sender. i had mine setup like this untill i put the electric fuel system in. i ended up milling a flat spot in my hpop and putting my oil pressure switch for the fuel pump and pressure sender in the new location and putting the factory plug back in the hole.
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