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Author
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Topic: Changing oil pan gasket/rear main - 94' F150
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skips69
Gearhead Posts: 294
From: Catlin, IL USA
Registered: Mar 2001
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posted 01-23-2003 08:00 AM
   
A friend has persuaded me to help him change the oil pan gasket and (possibly) the rear main seal on his 94' F150 this weekend. It is a 4wd and I believe it has the 5.0 in it. Since it is not my truck and I am not overly familiar with it, a couple questions: 1) Can the oil pan gasket be changed by just dropping the pan, or will the engine need to be lifted by taking out the through bolts on the motor mounts? Had to do this on a 90' Mustang GT once, what a pain! 2) If we decide to go for the rear main, what needs to be done here - drop the tranny? I imagine so, so please respond with any tips in this area. I will be trying to persuade him to wait until a later date and see if the oil pan gasket cures his woes. Has been leaking about 2 quarts per gas fill up for at least the last 7 months that I know of. Not good, I have been on him to get this taken care of, and now he has asked for my help, so what can I do.............
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SteveLaRiviere
Administrator Posts: 36138
From: Saco, Maine
Registered: May 99
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posted 01-23-2003 08:53 AM
Since it's a 4x4, it will be a pain, with that front axle in your face. Start early Saturday.  You won't need to drop the tranny. Here's info on the seal: https://mustangsandmore.com/ubb/Forum1/HTML/006301.html ------------------
'70 Mustang Mach 1 - '72 Mustang Sprint - '94 F-150 Please remember our sponsors,
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SteveLaRiviere
Administrator Posts: 36138
From: Saco, Maine
Registered: May 99
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posted 01-23-2003 08:55 AM
quote:
Originally posted by SteveLaRiviere:
You won't need to drop the tranny.
On second thought, you will if that's a one piece seal. I'll check in a bit... ------------------
'70 Mustang Mach 1 - '72 Mustang Sprint - '94 F-150 Please remember our sponsors,
Mustangs Plus, NPD, Osborn Reproductions, MyFordPerformance.com, and FordRamAir.com
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SteveLaRiviere
Administrator Posts: 36138
From: Saco, Maine
Registered: May 99
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posted 01-23-2003 08:58 AM
Another thing: That oil leak could be caused by a rusted-through oil pan. That's very common on these.------------------
'70 Mustang Mach 1 - '72 Mustang Sprint - '94 F-150 Please remember our sponsors,
Mustangs Plus, NPD, Osborn Reproductions, MyFordPerformance.com, and FordRamAir.com
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skips69
Gearhead Posts: 294
From: Catlin, IL USA
Registered: Mar 2001
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posted 01-23-2003 03:36 PM
Oh, I expect it to be a pain alright. I hadn't heard of the oil pans being weak and rusting through on these, so I'll give that some closer inspection when I am under there as well. I had a 90' Mustang GT that was leaking oil very bad such as this truck several years ago. I changed the valve cover gaskets - still leaked. I changed the oil pan gasket - still leaked. I changed the rear main seal - still leaked. In frustration, I bought another 5.0 engine out of a wrecked 91' GT and replaced all the gaskets on it while on the engine stand. It was complete and I heard it run before I bought it. I was tired of screwing with this car and was going to take care of the leak once and for all by changing out the engine - couldn't find anyhting else wrong and definately leaking from the rear somewhere. As soon as I had the old engine clear of the firewall I found my leak - It was the $3.00 PCV valve! The screen was plugged and oil had been pouring out of it all this time. I never did see the thing until the engine was out due to it tucking in below the firewall. Yes, I was pissed, but I learned that day as well. So, I will be checking on that as well when I get over to his garage this weekend. Just looking for tips from someone who has worked on the same areas on the same type of vehicle. I know that Mustang was a real pain to get at due to siting so low and having so much electrical and sensory stuff in the way. Hopefully the truck will be easier to get around on (had forgotten about the axle though).
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SteveLaRiviere
Administrator Posts: 36138
From: Saco, Maine
Registered: May 99
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posted 01-23-2003 04:23 PM
As a matter of fact, Mike just had to change the oil pan on his '95 5.0 just a little while ago.------------------
'70 Mustang Mach 1 - '72 Mustang Sprint - '94 F-150 Please remember our sponsors,
Mustangs Plus, NPD, Osborn Reproductions, MyFordPerformance.com, and FordRamAir.com
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BLstangin
Gearhead Posts: 434
From: South Central MN
Registered: Apr 2002
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posted 01-23-2003 06:48 PM
Check out this link where I explain how to change and oil pan gasket on this type of truck. You would have to either pull the motor or drop the tranny to put in the rear engine seal, because it is a one piece seal. I would bet that it is just the oil pan gasket, as they were rubber and liked to push out the side with time, and then leak big time. Brandon.
https://mustangsandmore.com/ubb/Forum9/HTML/000702.html
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1970 coupe restored with the help of my dad. 302 with 600 holley, aluminum intake, headers, 4-speed toploader, and 2.79 open 8" rear. Soon to be 9" 3.25 trac-lok
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MLariviere
Moderator Posts: 3578
From: Biddeford,Me.USA
Registered: May 99
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posted 01-23-2003 11:30 PM
quote:
Originally posted by SteveLaRiviere:
As a matter of fact, Mike just had to change the oil pan on his '95 5.0 just a little while ago.
I haven't done it yet.  I just slapped another coat of POR-15 on it. This spring.
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