I finally figured why my engine went down hill in such a short order. The tube for the oil pickup was completely broken off at the oil pump. There was even a piece of #8 oil control ring in the screen.


We just got the engine out in time before it was a catastrophic hand gernade that let go. Everything had to come out through the bottom of my coach, after the front "I" beam axle was removed. There are about half a doven parts that are on back order and should be in this week.

Seems to me that I remember something years ago about brazing the pickup tube to the pump, due to this problem. My question is: Do the 460 engines have a regular problem with this?

Sorry about the large image, couldn't figure out how to reduce the size on this forum. Maybe the moderator can make it better.

Thanx:
"Doc"

 

You load the picture into some kind of software, then scale it, and save it back on your photobucket server. Imagewalker does this well, and it's absolutely free (google for imagewalker). Also, you can do this with paintbrush, built into your windows PC.

460's generally don't have this problem, but brazing it on is never a bad idea just to be safe. It's always astounded me how flimsy oil pickups are considering how critical they are.

 

sorry about the mishap,iam starting to worry about my 1992,,460 also in a motorhome,have to keep a close eye on the oil pressure at all times,,is this the 460 engine that first starting burning oil on your previous posts? thanks

 

Mine had a similar problem. The mechanic I talked to about it said he had seen quite a few 460s with pick up tube problems. Needless to say I bought a new one from the dealer for the re-build and plan on welding the tube to the bracket.

 

That's what the boilt is for, to keep the pickup in the pump. Locktite it an use a tab washer and it can't come out.

 

Yes, this is the motor that has recently been giving me some problems. It started out with an overheating problem. The cooling system looked good, even the thermostat that was replaced for good measure. We are now thinking that the motor was starving for oil and causing the extra heat.

#8 hole was trashed. It is sleevable, and I will not have to pay for the core. FoMoCo accepted it at full value. #5 - #7 were starting to look bad also. About a month before I took it into the shop, I had good compression on 5-7. However just before the engine was pulled the shop did a diagnosis and the compression on the drivers side was about 50% of what I had previous.

Then when we got the motor out, we found the pickup tube was completely cracked.

We also found that the engine was running quite lean, from the indications of the plugs and exhaust manifolds. Most likely due to the emense oil burning (1 quart in 1 hour) from #8 cylinder. However there was never any trace of oil on the side of the coach. It was being burnt in the exhaust manifold.

Now the engine is back in, just waiting on a couple of back ordered parts for the suspension, as the complete front "I" beam axle had to come out. A couple of bushings are on order and then it will be done. Next trip is to the algnment shop.

Good news is that the engine comes with a warrenty of 3 years/36,000 miles. If it gives up the ghost, FoMoCo will foot the next bill.

"Doc"

 

I just finished putting a new 460 short block together for my 88 F250. The oil pump pickup tube had a slot worn in it from the dipstick. the opening was about 1/32nd square and enough for it to suck air and loose oil pressure. I picked up the truck with this problem and this is where i led...

Garbz

 

well i will have to drop the pan on mine and replace the pickup tube with a new unit from ford then have it welded before I bolt back up,don't remember if i have the rear sump pan or not,its on the 92,f53 chassis,I have to replace it to give me peace of mind,,,will i need a new rear main seal ? i think its just the pan gasket right? good luck on your motor ,and thanks for letting us know of your encounter

 

I had a groove worn in my pick-up tube by the dip stick too. Luckly, I found it before it cut through, so I never lost pressure. I filled the groove by brazing it. When I replaced the oil pan (it was rotted out), I checked the clearance with clay and it was ok. I think the original oil pan must have positioned the dip stick a little too high.