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Old 02-11-2012, 10:54 PM
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Patching up a 4.7L engine oil pan

Many of you WJ owners (especially those in areas where they over salt/chemical spray the roads in winter) have seen this:

Mmmmmm.... rust! Not sure why it does this, if its poor design, or my Dad's theory is it has something to do with heat from the Y pipe running right next to it. Either way if left unchecked a hole in the oil pan would cause quite a problem.

Ok, we started by scraping off the surface rust. It looked bad at first, but it was mostly surface rust. Here is a picture after scraping off the surface:


Next we lightly sanded the bottom of the pan, removing more of the rust:


After that we hit it with some black rustoleum. We were going to use JB weld, but decided that might not be the best route. Since the metal was still in decent shape the rustoleum should prevent the rust from spreading or getting worse.


So there it is! Since I'm under the Jeep at least every 4,000 miles I will keep an eye on it but this should be one lest problem for me to worry about with this damn thing.

Stay tuned for next weekend, O2 sensors and a water pump!
Just for fun since it was a nice day and she was fairly clean I snapped a few other pics just for fun:


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My Jeep: 2001 Grand Cherokee Limited, 245/65R17 Falken Rocky Mountain ATS, K&N drop in air filter, Bilstein HD's. De-badged, eagle-eye LED Tails & LED 3rd brake light, Addco front and rear sway bars, Superchips tuned & TM snip, interior 6k LED's, Gen3 ccfl projectors with Volt 6k HID lows, akebono brake upgrade with R1 Concepts premium rotors.
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Old 02-11-2012, 11:19 PM
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Re: Patching up a 4.7L engine oil pan

What's it doin' sniffing Stang fumes? Sorry buddy but once it starts that oil pan is gonna be a bi yearly thing till it finally gets a hole. If you can wait I have a new one and am going to do a writeup come spring.
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Old 02-11-2012, 11:58 PM
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Re: Patching up a 4.7L engine oil pan

Yeah I'm hoping to keep on top of it, we will see. From the service manual it looks like you would have to remove the structural cover between the engine and transmission(so thats the part I saw in the way of the pan bolts today...), the starter motor, and the exhaust Y pipe. The only thing that worries me is that Y pipe, I haven't had much luck as far as things coming apart easily in the exhaust work I have done.

According to the manual the pan is made of laminated steel. Doesn't sound like the best choice to me, although I'm not that knowledgeable in metallurgy. I'm kinda wishing it was aluminum like the wife's car, at least it wouldn't rust! Would a replacement part be manufactured the same way?
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Old 02-12-2012, 12:00 AM
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Re: Patching up a 4.7L engine oil pan

Oh and that is my Dad's Mustang. Its his first winter with it and he won't let it out of the garage, (and I dont blame him) but every time we work out there he has to pull the cover off and fire it up for a while.
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Old 02-12-2012, 10:17 AM
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Re: Patching up a 4.7L engine oil pan

My Son has an '08 GT ragtop and I just friggin love that thing. I can't seem to get my hands on it much though As far as the pan goes there are a lot of different stories but I did read where people have had success removing the track bar,bring the pan forward,then dropping the rear of the pan under the pipes and then sliding it back and out the rear.I hope so. Getting that pan gasket/baffle separated is supposed to be a bitch though. I don't remember having all this trouble when I did this on my old Durango.
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Old 02-12-2012, 02:27 PM
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Re: Patching up a 4.7L engine oil pan

Either way it doesn't sound like a fun project. I looked up the pan on rockauto, they only have one from spectra premium but its at least powder coated, should hold up better.
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Old 02-12-2012, 02:41 PM
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Re: Patching up a 4.7L engine oil pan

Mmmm, shiny Jeep...


Seriously though, I'm going to get the oil changed in mine next month (Mobil 1 ESP FTW!) and will ask to have a peek under there whilst she's up on the ramp. Planning to do the under-sealing this summer too so would be handy to know how much scraping off dirt I have in store...
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Old 02-17-2012, 08:41 PM
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Re: Patching up a 4.7L engine oil pan

My '01 4.7 has 125,000 and the oil pan needs to be replaced. I never knew it was a problem unitl I took it for a quick oil change and the mechanic showed me. I feel like I could almost push a screwdriver through it by hand. It looks like too much of a PITA for me to do myself so I'm probably going to have a mechanic do it. Dealer quoted me $150 for the pan and $52 for the gasket. I'm probably going to get the parts off ebay. While the pan is dropped is there anything else that should be replaced or looked at? Thanks
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Old 02-24-2012, 01:37 AM
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Re: Patching up a 4.7L engine oil pan

did that chip save you any gas mileage?
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