Range rover 4.0 in 98 land rover disco I

[RedRover 1]

I know the block is the same for the 4.0 in the Range Rover and the Disco I but are there any issues with the swap. I want to take the 4.0 out of a range rover and put it in my 98 disco I. I am thankful for any help here.

[Bowie69]

There's no dizzy on the 4.0, so you would need the electronics from the P38. Beyond that you may or may not get the signals you need for elsewhere in the truck...

Probably not that difficult...

[garrycol]

To be pedantic, the blocks are actually different - a 98 Disco will have a 3.9 block and the RR a 4.0 block - for sure exactly the same capacity but the the 4.0 had 4 bolt mains and the crank shaft is a bit thicker. However given what you want to do this is not such an issue.

Also as mentioned there is no dissy on the 4.0.

The simplest way would be to take the timing case cover and cam shaft out of the 3.9 (should really put in a new camshaft) and put it on the 4.0 and then use the 3.9 injection etc.

I could be wrong but I doubt the 4.0 ECU will work in the Disco without a major and expensive re-write as it needs to talk to other computers in the P38 like the Body ECU that do not exist in a Disco. A better way would be to just put in the 4.0 complete and change the ECU to a Megsquirt ECU.

A less elegant way would be to put the 3.9 injection system on the 4.0 and use a Megajolt system to run the ignition but then why not throw the 4CUIX ECU out and Megasquirt the whole system.

Some options to ponder.

Garry

[daslandroverman]

American market Discoverys had the 4 litre GEMS engine from about 1996, so if you were keen enough you could get the bits required to make it run standalone without the hassle of making a P38 ECU and wiring work.

3.9 front end on the 4.0 and keep the 14CUX is probably the cheapest (along with the simplest) and how I'd most likely do it,

Many ways to skin a cat though.

[Bowie69]

If it is an earlier 4.0, then the wiring loom for the engine is separate, and unplugs from rest of the car (I know, I have one here), so might not be as integrated as some are saying above ^^

.

[FridgeFreezer]

Don't forget the P38 sump & pickup are different too, not just the front cover & top end... and camshaft nose...

I vote Megasquirt because of course I do