I have a 92 f150 with a 300ci L6, 5spd stick, 2wd, aftermarket rust accents on the hood and bumpers etc. For some reason, my oil pump died so I had it replaced. To replace an oil pump, you actually have to lift the engine to get to the oil pan, which I can't do, so I had to get a mechanic that could. It costs a lot. We had that oil pump for about a year and then it died. I think we are now on the 3rd or 4th pump, and it just started acting up like it is about to die to. I've never seen anyone replace so many oil pumps on one truck. Any ideas what the real problem might be?

 

Welcome to the forum! What exactly causes you to replace it that often? Have you measured oil pressure before and after oil pump replacement?

 

maybe you have a bunch of sludge or your oil galleys are plugged some and its over working itself. hopefully your replacing the screen as well?

 

Hey thanks for responding so quick
The sludge was cleaned out last year when the pump died. I assume the screen was replaced too because it would have been covered in sludge. The mechanic said there were solid chunks of gunk in the pan that he also cleaned out. He thought that was what the problem is. As far as measuring the oil pressure, I watch my oil pressure gauge religiously because it's the only way I know how to measure the oil pressure. It's not exact, but it works pretty good. The pump seems to go out suddenly with no warning.
There is one other thing that I never thought anything of until now. When I crank up the truck cold, it takes a couple seconds for the oil pressure to come up.

 

well those solid chunks are probably clogging up your oil galleys just like arteries and your heart. i would hate to do it on a new oil pump but

 

you need to find a solution that you add to your oil to break that stuff down

 

i just read that your pump is "about" to die, so i would run a solution through it soon. it probably will kill your pump "in theory" with all the crap but i would rather do it to that pump than i new one. I guess you change you change your oil regularly? do you run convention or synthetic? use a good filter?

 

How is your headgasket? Is your antifreeze and oil mixing (milky color)?

 

I had a similar problem, I drained the oil and put #2 diesel fuel in there and ran it. I know this sounds sketchy, but diesel is just a more refined form of oil, hence the name, fuel oil-- I ran it for a few minutes revving it occasionally, keeping an eye on the oil pressure guage. As long as there is a little bit of pressure, it will be fine. I then drained it, refilled it with oil, ran it till it warmed up, drained it, and then replaced the filter and refilled it.(with oil of course)- The results were amazing!! the oil pressure was renewed to normal, no problems since. This is a good cheap way to flush your oil delivery system. Good luck

 

If you're using the factory gauge to see if the oil pressure is fine then you aren't seeing the real pressure. The factory gauge isn't all that reliable. Plus the sending unit gets clogged up and gives bad gauge readings. My pressure was showing low so I changed my sending unit and the pressure would read fine. Now it's showing low again so I think I will install a mechanical gauge soon.