1986 F150 - 302 V8 5.0

I am replacing the oil pump and oil pickup tube/screen because one of them is failing on me. According to the Haynes Repair Manual, I need to remove the upper intake manifold and the radiator before I jack up the engine in order to remove the oil pan.

When I removed the fan shroud from the fan (easy to do because fan shroud is broken at the bottom) it looked like I had plenty of clearance between the fan and the radiator. And there is probably 3 inches of clearance between the upper intake manifold and the body of the truck and Haynes says I only need to jack the engine up about an inch.

Has anyone ever done this without removing the upper intake manifold and radiator?

 

What makes you think one of them is failing??

-Enjoy
fh : )_~

 

When I start up the engine at the beginning of the day the oil pressure gauge reads 40-50 psi. A few minutes later (and for the rest of the day) it drops down to 0-5 psi. When it is down this low I hear what I believe to be the oil pump making a knocking sounding. This sound is absent at 40-50 psi. I bought the truck a week ago and when I test drove it I did not hear it. The oil has been changed twice since then and the sound keeps coming back and the oil pressure keeps dropping.

My assumption is that the oil pickup screen is clogged so I was going to install a new pickup tube w/ screen and gasket. I figured while I am down there I should go ahead and put a new oil pump in.

Any thoughts? Think it could be something else? The knocking sound makes me pretty sure it isn't an electrical problem w/ the gauge. If there were no sound, I would simply find someone to hook up a mechanical pressure gauge to the oil pressure gauge socket and see if my reading is correct.

 

Sounds right to me. I don't understand why you would have to remove the radiator or the intake manifold though. It is a pain and I jacked it up more than one inch to remove the oil pan, I think on one I had to remove the lower radiator hose, but not the radiator.

 

Good to know someone else has done it successfully without removing those two things! I'll be giving it a shot thursday. Now if there were only a way around having to remove the left exhaust pipe that turns directly under the pan.

You didn't happen to get lucky and get the oil pan out while leaving the pipes intact did you? I'm not sure any amount of PB Blaster is doing to loosen these up...

 

I had to do it last summer.

I had to lift it much higher than 1 inch. We ended up taking the skid loader and using it to raise the engine out. I didnt need to remove the manifold or radiator.

BUT! I suggest you watch your hoses and wires carefully as some might not be long enough. We didnt watch close enough and ended up breaking the tube end off my power steering pump. Broke the plastic peice on it so i had to buy a whole new pump.

As for the crossing exhaust pipe, we ended up cutting mine and rewelding it back on since it didnt seem there was any other way. You might check and see how your exhaust system comes off. Because i just did on mine a few weeks ago and i had 4 bolts holding it up so it was very easy to take out. An this might be a easier route for you.

This was a very head pickin day so if you do plan on doing it i suggest you pick a good day and start a bit early. GOOD LUCK!

 

Nope, had to remove the exhaust too, forgot that part, and the dust shield on the automatics, and the starter. I think the last one I did took me about 8 hours to remove the pan, change the oil pump and put the new pan and gasket in. Of course about 3 hours of it was pissing with the exhaust, it did not come out peacefully.

 

Yep that exhaust is what kicked our *** also.

I believe it took us around 6-8 hours to do mine. Thats removing oil pan, cleaning it thouroughly, painting it, and replacing the power steering pump.

 

So packdaddy expect to make a whole day of this. I find cursing alot and hitting things with other things helps alot.

 

take a torch and put a little heat on the exhaust bolts and they'll come right out.

 

That didnt go so well for us. We ended up cutting it off.

 

Worst case scenerio on the last one I did. They were so rusty the studs broke off on the manifold and didn't have time to go find new exhaust manifolds so I cut them flush (because what remained of the studs would not budge) and drilled and tapped the holes and put bolts in with washers and used loctite, hope she doesn't ever want to take the exhaust off.

 

If you're hearing a knocking it's a safe bet your main and rod bearings are toast. 5 psi is not enough oil pressure at idle, let alone at RPM. Plan on replacing main and rod bearings at a minimum.

I recently did a '94 for my neighbor, pulled the engine to do the oil pan gasket, he noted it had low oil pressure (but no knocking or bad noises) so I checked bearings... All shelled out to copper. I would have liked to do a complete rebuild on the engine but it wasn't in his budget, so we did a freshening up. Hone, rings, bearings, oil pump, water pump, clean all parts, reassemble, paint, etc. Came out nice, runs well. Do it right or you'll spend more in the long run in both money and wasted time.

 

Hey pack daddy I'm in a world of ***** with my radiator. Is your f150 equipped with AC? Bc I have an 84 with an 86 engine in it and it appears to be a 3 row radiator, there any possible way you have pictures of what your radiator looks like? Please help my email is ggkp33@msn.com.