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|07-23-2007, 03:41 PM||#1|
4.0L SOHC Engine Swap... 97/98/99/00/01/02/03 Motor Interchange (w/ photos)
I have a clean '98 Explorer 4x4 w/ a 3" body lift on 30" Cross Terrains. At about 150k it started a rattle in the rear cassette. New tensioners didn't help & I opted not to pull the motor, buy the tools, and change out the timing cassettes. So we drove on... and on... and on... and I was about to tell people Ford made a diesel Explorer. Then, last week at 190k, she finally jumped time and bent the valves.
So, I need to change out the engine. I have some questions but I'll try to contribute some consolidated info first. This is what I've been able to gather from mainly searching the board...
Here are the different engines available for the years in question:
6-245 (4.0L), SOHC (VIN E), 4x2
6-245 (4.0L), SOHC (VIN E), 4x4
6-245 (4.0L, SOHC), LHD, exc. flex fuel; (VIN E); Sport Trac, thru 7/23/00
6-245 (4.0L, SOHC), LHD, exc. flex fuel; (VIN E); Sport; thru 7/23/00
6-245 (4.0L, SOHC), LHD, exc. flex fuel; (VIN E); Sport Trac, from 7/24/00
6-245 (4.0L, SOHC), LHD, exc. flex fuel; (VIN E); Sport; from 7/24/00
6-245 (4.0L, SOHC), LHD, exc. flex fuel; (VIN E); exc. Sport and Sport Trac
6-245 (4.0L, SOHC), (LHD), exc. flex fuel; (VIN E); 4 Dr, exc. Sport Trac
6-245 (4.0L, SOHC), (LHD), exc. flex fuel; (VIN E); 2 Dr (Sport)
6-245 (4.0L, SOHC), (LHD), exc. flex fuel; (VIN E); 4 Dr, Sport Trac
'97-'03 will all interchange. Some things are different in all of these years. Most are minor. Don't change out your ECU.
Last edited by Gannz; 08-08-2007 at 11:59 AM. Reason: New info
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|08-07-2007, 04:30 PM||#2|
I recently finished my ‘98 to ‘03 swap and everything is working as it should. There are a few more things (other than what’s listed above) that are different about the engines…
You have to use your old exhaust manifolds. The newer manifolds use studs instead of bolts but that’s not a big deal. What is a big deal is that the studs are spaced further apart and they won’t fit the flange. Anything can be modified but it won’t be worth your time and effort to make the new manifolds fit unless your old manifolds are warped or cracked. You also need to use your old EGR valve, bracket, and pipes.
You can save some time if you use your old valve covers. I chose to go with the new covers and I like how it turned out but there was a good bit of modifying necessary to get everything to match back up. The coil pack, upper radiator hose, PCV valve(s) (mine now has two and an extra line), spark plug wires/mounts, DPFE sensor, and the main electrical harness connector bracket all need to be modified. If you use your old valve covers all of these will match up as on the old engine.
The older engine emission system circulates air through a freeze plug knocked out of the block above the crank. The new engine circulates from the rear of the drivers side valve cover. I suspect Ford eliminated the crank breather b/c it clogs over time. I instead set up mine to use both which should make for better circulation and also provide a backup in case one line clogs. If you keep the crank breather (you have to keep it if you use your old valve covers) it would be a good idea to clean it the next time you change out the intake manifold gaskets.
The cam sensor, oil pressure sender, and block ground appear to be the only sensors/connectors you’ll need to use from the older engine. I used all the sensors from the newer engine except for these three.
You need to use your old heater hose bracket/coupling.
The oil filter is different and you need to get filters to fit an '02/'03.
Last edited by Gannz; 08-20-2007 at 06:36 PM.
|11-23-2007, 05:52 PM||#4|
97 and 2001 Explorer XLT
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Great information. I have a 97 explorer, 4 wd. 4.0 sohc engine. I just picked up a 99 4.0 engine today for it. Right away I see I have 2 fuel lines on the 97 and only 1 on the 99 engine. I've read somewhere about using the old fuel rail and maybe the old injectors too. Can anyone help or give me a link to where I read this? I'm not sure what to use from the old engine and still get the the computer to work right when I start it up. I switched a 2000 into a 2001 last year and all I had to do is plug it in and it ran like a top. This one's a little more complicated.
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