4.6 into 2001 D2

[kcabpilot]

This is an extension of my "Diagnosing overheat" thread

I have found a couple of options, one is a salvaged '03 that was in a wreck but otherwise is running well with 105k on it. The other is a used 4.6 engine that had 72k on it and comes with free shipping and a 3 year warranty.

If I do the engine swap I would then proceed to build my ultimate tophat linered engine out of my 4.0 while still being able to use my Disco until the time I was ready to finish it at which point I'd pull the 4.6 and use the crank and rods for the new motor.

My question is: do I need a 4.6 ECU or will it work with the existing ECU?

If I buy the salvage it would of course come with an ECU, can I just swap it into my truck or is there something else to it?

 

[rovercanus]

The ecu in your truck should work fine with a 4.6. If you change your ecu you may have to sinc it with the bcu since they both store the vin number.
I'm sure DiscoStew will be here shortly to disagree with me.

 

[Drillbit]

Walter is right.

 

[Mike26]

you'll be just fine with your ECU. put a 4.6 with crower 229 cam in my '01 and it runs it perfectly, no lights and no codes

 

[kcabpilot]

Great, thanks. I think I'm going to go with the engine so I won't have to deal with the logistics of having an entire other truck to part out or otherwise get rid of.