blz6662 Posted August 31, 2017 Share Posted August 31, 2017 Hi all, Just require your comments or thoughts on this one. Currently rebuilding an EA Chassis Range Rover Classic currently fitted with it's original 3.5 V8 efi (Flapper) engine with manual box and have the chance of buying a cheap scruffy 1997 Discovery 1 3.9 V8 efi (Hot Wire) also with manual box. The engine and box are in fine fettle and has an mot for about six months, but it will fail the next one on welding (lots) plus various other problems. So my intension is to strip the Disco and transplant the 3.9 complete with it's loom etc. into the Classic. Does this seem a feasible thing to do as the 3.5 is past it's sell by date and needs a rebuild. Cheers blz6662 Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted August 31, 2017 Share Posted August 31, 2017 Yes, very feasible, and pretty simple to do, huge improvement in drivability as well. The EFI loom will need disconnecting from the main loom under the seat, whether this plugs into the earlier vehicle is another question, though even if not, it is hardly rocket science to wire up... Then, you may want to look at getting the radiator moved over, if at all different, just to ensure the cooling is up to snuff. Essentially though, it is RV8 to RV8, the nuts and bolts are the same. I think the oil filter should be OK from that age Disco as well. Quote Link to comment Share on other sites More sharing options...
Ally V8 Posted August 31, 2017 Share Posted August 31, 2017 The 3.9 EFI loom is completely separate from the rest of the car,so you should be able to carefully remove it and fit it back into the RR Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted August 31, 2017 Share Posted August 31, 2017 Yup, exactly ^ I just don't remember if the plugs on the main loom are the same between hotwire and flapper? Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted August 31, 2017 Share Posted August 31, 2017 The ECU plugs are different. I've heard it said that flapper will run a 3.9 happily enough, so you could "unplug" the 3.5 lump and remove it and drop the 3.9 in. Quote Link to comment Share on other sites More sharing options...
V8 Freak Posted September 4, 2017 Share Posted September 4, 2017 On 8/31/2017 at 0:47 PM, Ally V8 said: The 3.9 EFI loom is completely separate from the rest of the car,so you should be able to carefully remove it and fit it back into the RR When I dropped my first 3.9 into my old 110 (Replaced 3. on carbs) I seem to recall that it pretty much needed a switched live (Fuel pump) and an earth to get Hotwire to work. (Needed to change the fuel pump for higher pressure pump in my case) Quote Link to comment Share on other sites More sharing options...
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