replace oil Pump?
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5th Wheeling
Joined: Jun 2006
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replace oil Pump?
I will be changing my timing chain set on my 86 F250/460 and figured I will tackle the rear seal and pan gasket leaks while I am working on it. From my understanding I have to drop the oil pump to get the pan out. Should I swap in a new one at this point? How common is it for these to go? I have a little under 140K on the engine and great oil pressure. I know it is only 40 bucks aftermarket but I have been snake bit before on other vehicles when I change out a working OEM part with an aftermarket part (just because it was easy to get at when working on something else) and have had the replacement part fail sooner than it should.
Your experience is appreciated!
Phil
Your experience is appreciated!
Phil
Senior User
Joined: May 2007
Posts: 103
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I can't say specifically about aftermarket oil pumps, but on the whole I would take an OEm part (even if it has some miles on it) than an aftermarket.
Incidentally, I might be looking at this project in the near future. Do you have to lift the engine? What's involved in that? I got a pretty good oil leak, and it looks like its coming from the front main seal. Getting tired of the wife naggin about the growing oil stain in the driveway.
Incidentally, I might be looking at this project in the near future. Do you have to lift the engine? What's involved in that? I got a pretty good oil leak, and it looks like its coming from the front main seal. Getting tired of the wife naggin about the growing oil stain in the driveway.
Posting Guru
Joined: May 2004
Posts: 2,223
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From: Billings Montana
Two summers ago, I started to do the same project on my 86 F-250 with a 460. I had to replace the rear main seal and since it's a two piece seal, I figured I'd pull the engine so I could replace all gaskets, replace the timing chain, new cam, oil pump, clutch, etc. and get the engine cleaned up and a new shiny Ford Blue paint job.
After all was said and done, I had the 460 rebuilt due to my, "well, I might as well......." attitude. You can see my gallery for the pics. But I can say that if you don't want to replace the oil pump, as long as you get good pressure from the old one, it should be ok. An oil pump rarely goes bad. The main reason most people, (myself included), replace the oil pump and often times the clutch is for cheap insurance. It's such a big job doing all that work that you really don't want to have to do it again a little bit down the road.
After all was said and done, I had the 460 rebuilt due to my, "well, I might as well......." attitude. You can see my gallery for the pics. But I can say that if you don't want to replace the oil pump, as long as you get good pressure from the old one, it should be ok. An oil pump rarely goes bad. The main reason most people, (myself included), replace the oil pump and often times the clutch is for cheap insurance. It's such a big job doing all that work that you really don't want to have to do it again a little bit down the road.
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Joined: Jan 2001
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From: Virginia
Changing the front seal is not too bad, but you usually do have to lower the front of the oil pan to get the cover off, and they give you short pieces of oil pan gasket to splice into the old gasket. The hardest part sometimes is getting some of the bolts out of the timing cover, they really get corroded sometimes. You need to buy a puller to get the harmonic balancer off, and when it comes off, carefully inspect the shiny surface were the seal rides. If there is a groove were the seal runs, you can buy a "speedy sleeve" to slide over the seal area on the damper, and this will renew the surface so the new seal will not leak.
Pulling the oil pan completely out is a real job. The engine has to be jacked up, and you do probably have to reach in over top the pan and take the oil pump loose. I would not worry about the quality of the oil pump, since most stores sell name brand pumps like melling, which are probably better than the original pump.
Pulling the oil pan completely out is a real job. The engine has to be jacked up, and you do probably have to reach in over top the pan and take the oil pump loose. I would not worry about the quality of the oil pump, since most stores sell name brand pumps like melling, which are probably better than the original pump.
Last edited by Franklin2; Jul 23, 2007 at 01:12 PM.
Thread Starter
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5th Wheeling
Joined: Jun 2006
Posts: 34
Likes: 2
From what I have read, in order to get the pan out completely you have to raise the engine and reach in and disconnect the oil pump and remove them together. This is what got me thinking about replacing the pump, then I was trying to think if the pump actually wears that much at all (compared to a water pump or something). I have seen engine crud get past screens and jam in the pumps causing the shaft to snap - but that can happen on a new pump as well.
My origional question was that if I unbolted the pump to get the pan off should I spend the bucks and put a new one in. I realize it is a bit of work to get it all out but I don't have a lift or the space to pull the engine so I am limited to doing this from below.
Here is a question - can the rear seal be changed without removing the pan completely? Might be more trouble that it is worth trying to clean up an old pan gasket with it still semi-attached to the truck though.
Phil
My origional question was that if I unbolted the pump to get the pan off should I spend the bucks and put a new one in. I realize it is a bit of work to get it all out but I don't have a lift or the space to pull the engine so I am limited to doing this from below.
Here is a question - can the rear seal be changed without removing the pan completely? Might be more trouble that it is worth trying to clean up an old pan gasket with it still semi-attached to the truck though.
Phil
Post Fiend
Joined: Oct 2003
Posts: 9,176
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From: Western Central NV
I hate to spoil a lot of hard work. But with 100,000+ miles I haven't seen a OEM 460 that didn't leak oil from the rear main. If it is just leaking, like mine has been doing for 10 years. Not running out, I use Lucas oil treatment and it slowed mine down too a small leak. The reason I say this is because if your going to go through all that work why not rebuilt the engine? That is what I decided 10 years ago, and 65,000 miles ago. I'm still driving it. with 185,000 miles on it. Maybe in the next 5 years or so I'll rebuild the engine. I use aa quart of oil every 1500 miles, But oil is $1.89/ qt for NAPA OIL. So if I figured right that means in 10 years & 65,000 miles I have use an extra 44 qts of oil @ $1.89/qt.
As for the timing chain I'd do that, I did mine.
As for the timing chain I'd do that, I did mine.
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