View Poll Results: Have you had a rusted leaky oil pan on a 5.0?
Multiple Choice Poll. Voters: 9. You may not vote on this poll
Leaking oil pans
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Freshman User
Joined: Oct 2003
Posts: 45
Likes: 0
From: The Iron Range of Minneso
Leaking oil pans
Is it just me or is there a problem with the oil pans on the 5.0's rusting and leaking? I work with three guys who have experienced this on 1989, 1990, 1987 trucks with 5.0's And now the 1991 I just picked up has the same problem. Does any one know of a fix that doesn't involve changing the oil pan out. One Guy used epoxy with some success.
Elder User
Joined: May 2007
Posts: 754
Likes: 1
From: Solon, Ohio
It's called JB Weld (the epoxy)
I use JB Kwik but you have to work fast.
Clean the area well with a wire brush and brake cleaner.
Where the actual little hole is, try to force some in first (using your fingers) (wear rubber gloves) so that it might form a little ball inside to help retain, then spread some around the area.
It should outlast the truck.
If it's a pin hole and the metal seems strong enough you can use sheet metal screw with a mini rubber grommit as a washer for a kwicky fix.
I use JB Kwik but you have to work fast.
Clean the area well with a wire brush and brake cleaner.
Where the actual little hole is, try to force some in first (using your fingers) (wear rubber gloves) so that it might form a little ball inside to help retain, then spread some around the area.
It should outlast the truck.
If it's a pin hole and the metal seems strong enough you can use sheet metal screw with a mini rubber grommit as a washer for a kwicky fix.
Thread Starter
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Freshman User
Joined: Oct 2003
Posts: 45
Likes: 0
From: The Iron Range of Minneso
Thanks
Sorta what I was considering. This truck won't be an every day driver ony a camper hauler to replace my rusty/trusty trucks camper duty. I'm looking into purchacing a newer short box truck within the next year.
Senior User
Joined: Dec 2006
Posts: 110
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From: Central Illinois
When I bought my '93 in November the first thing I had to do was replace the oil pan since it was so rusted. Figured we would just go ahead and do it then before it started to ruin the driveway. Replacing the pan is more of a job than we expected, have to lift the engine up, so that would probably be the best time to replace the oil pump also while you have the engine up.
Last edited by 93F150/302; Jul 22, 2007 at 05:11 PM. Reason: add content
Posting Guru
Joined: Jan 2001
Posts: 2,358
Likes: 3
From: Nebraska
Mine leaks, but I'm fairly sure it's the gasket. I have noticed the paint is almost all flaked off though, so maybe it is rusting. I need to fix it and will probably just replace the pan while I'm at it, after reading about the rust problems.
All of the non-leakers I see have all the paint on them still.
All of the non-leakers I see have all the paint on them still.
Elder User
Joined: Jul 2007
Posts: 681
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From: Agawam,MA
Mine doesn't leak .. yet. The paint is flaking off some areas but there's just metal showing. Probably a good time to clean it up good (get the grime off) and repaint with primer and engine enamel. This sounds like a real pain. Never heard of perforated oil pans until I read it here-- and have seen some rusty and beat-up oil pans on other types of vehicles in my day, including Fords
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Elder User
Joined: May 2007
Posts: 754
Likes: 1
From: Solon, Ohio
Originally Posted by quicklook2
not on my 4.9 motor in ohio.
I guess that is a responce to my "Will outlast the truck"
I live in Ohio too, so to be honest, sometimes they only last a few years.
I usually spray the pan with undercoating when I'm done.
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Post Fiend
Joined: Nov 2001
Posts: 14,947
Likes: 6
From: Topsfield, MA
It is a common problem with the 4.9, 5.0, and 5.8 because of the way they painted the pan.
Moisture gets trapped under the paint and can cause pinhole leaks.
I had one do it and I used some silicone to solve it, it lasted about a year and 1/2 until I got rid of the truck. I'm sure it would have lasted a lot longer.
Moisture gets trapped under the paint and can cause pinhole leaks.
I had one do it and I used some silicone to solve it, it lasted about a year and 1/2 until I got rid of the truck. I'm sure it would have lasted a lot longer.
Postmaster
Joined: Jul 2006
Posts: 3,978
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From: Central PA
I have replaced and fixed pans on every ford motor 300-6,302,351,460 Regaurdless of year.
If not bad You can clean/grind area and coat with JB weld or like stuff . I had hold for 4 yrs. But they rust from inside it seems.
If not bad You can clean/grind area and coat with JB weld or like stuff . I had hold for 4 yrs. But they rust from inside it seems.
Elder User
Joined: Jul 2007
Posts: 681
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From: Agawam,MA
OK: One piece of info missing so far on these posts: Is there a "favorite" spot for these little holes to form?: -Front under crossmember, -back near the plug -or the upper sides bear the pan bolts? (Or is it all random depending on the pan and the environment the truck lives in?)
Mine [ 1991 302] doesn't leak at this time, but there is rust up near the pan bolts and in the front over the crossmember. But the side areas are dry. I knocked on the pan to see if there were any weak spots, but sounds like intact metal to me. There's still original color paint at the very bottom where the oil plug is, but it's cracking.
(I don't know if that means anything, but when exhaust pipe and mufflers are at death's door they don't "ring" when tapped.)
Mine [ 1991 302] doesn't leak at this time, but there is rust up near the pan bolts and in the front over the crossmember. But the side areas are dry. I knocked on the pan to see if there were any weak spots, but sounds like intact metal to me. There's still original color paint at the very bottom where the oil plug is, but it's cracking.
(I don't know if that means anything, but when exhaust pipe and mufflers are at death's door they don't "ring" when tapped.)
Post Fiend
Joined: Nov 2001
Posts: 14,947
Likes: 6
From: Topsfield, MA
The rust could start from anywhere, no real pattern there....based on environment.
It can't rust from inside the pan....not sure if that is what you ment lostin90s...but they rust from moisture caught between layers of metal and paint.
It can't rust from inside the pan....not sure if that is what you ment lostin90s...but they rust from moisture caught between layers of metal and paint.