I have a 1989 E150 coversion van with a 302. The engine went bad on me this summer. I was considering a rebuild but I have run across a low milage 1993 351Windsor from another van for a very reasonable price. Would this swap be pretty easy? I tow alot and wouldn't mind the larger engine. Are there any issues with this swap? What should I look at when I go check out the 351?
I believe the 351 was available in this van from the factory. Would the fuel injection unit from the 302 fit on the 351?
Should be straight forward. You'll need the fuel injection and intake manifolds from the 351 van. Grab the y-pipe from the 351 van too, it's quite different (wider, higher) than the 302 y-pipe.
I am going to look at the 351 this weekend. It is a 1993 out of a van with 68,000 miles that was rolled. They have owned the van since new and said it has always had regular maintenance. They are asking $500. Everything comes with it (fuel injection, exhaust manifolds etc) except for the Y pipe. He was going to put it in his Mustang but never did,. Now he needs christmas money. fficeffice" /> > >
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I was looking through the Chiltons manual for my van, in most of the instructions the 5.0 (302) and the 5.7 (351) are grouped together so it makes me believe the installation of both engines is very similar. > >
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A few more questions I thought of: > >
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There is a cooling system capacity difference of about 3.5 quarts, will this be a problem keeping the engine cooled or is that just because of the difference in engine size? The radiator size seems to be the same for both engines. > >
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I am sure the 351 weighs more, I wonder if this will be an issue on the front springs or is the difference not that great. > >
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Lastly, he no longer had the Y pipe, are those expensive enough to be a deal killer? > >
The Y pipe is not a deal breaker, all you got to do is cut the 302 Y pipe where it goes under the motor and widen it a little. You should also get a 5.8 computer for the motor.
Hmm, another thing to think about is flexplate. Make sure you get the one with the 351. I can't help you here (too new for me, so hopefully someone else will say) what tranny is in your van? Can someone tell Schloo whether or not he can use the 351 flexplate? I know you can't use the 302 flexplate...
If I recall correctly, the van used the speed density system simlar to the FI trucks of that vintage. You wont need the 351 computer because the speed density system is a bank fired system. The one difference is that the 302 uses an anti-knock sensor where the 351 does not. You can either add the knock sensor, which there should be a position treaded in the manifold for it, or swap for the computer. The transmission should be the E4OD unless you have an AOD, that you will have to figure out on your own.
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Stock 1978 F250 Custom regular cab 4x4 with 351M and 4 spd.
1991 Bronco silver anniversary, 5.8L EFI, E4OD swapped for C-6, otherwise still stock.
You wont need the 351 computer because the speed density system is a bank fired system.
Both motors used the bank fired system so that doesn't make any difference. He should still use a 5.8 computer though because the fuel tables will be lean for the 5.8 with the 5.0 computer. If this were a mass air system I'd say don't bother, but the SD system is not as capable. If the truck has an E4OD tranny he's in luck, these also appeared behind 5.8's. The AOD is also OK because it's not computer controlled so an ECU from a 5.8 truck with a manual or C6 is good.
Thanks for the great help. I have one last area of concern. I was looking at a newer chiltons manual from the library that covered the E150 van from 1989 through 1996. I was comparing the wiring schematics for the 1989 and the 1993 for the 302 and the 351. In 1989, the electrical schematic is the same for the 302 and the 351.
However, when I compare the 1993 schematic to the 1989, there are some differences. I don't know if these will be a problem if I use everything from the 1993 engine or will I run into any serious wiring issues, what do you guys think? I have pulled and replaced a couple of engines in the past, but never "swapped" any for a different year.
im doing the same 302 to 351 swap in my 250 and i was just wondering if anyone knew how big of a difference 24lb injectors would make and if i would have to have the computer redone?
However, when I compare the 1993 schematic to the 1989, there are some differences. I don't know if these will be a problem if I use everything from the 1993 engine or will I run into any serious wiring issues, what do you guys think? I have pulled and replaced a couple of engines in the past, but never "swapped" any for a different year.
Don't use any '93 wiring, use everthing from your truck, it will fit the 5.8 just fine.
im doing the same 302 to 351 swap in my 250 and i was just wondering if anyone knew how big of a difference 24lb injectors would make and if i would have to have the computer redone?
You can't use bigger injectors without reprogramming the computer, period.
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