Does anyone have any insight on this? i have heard mixed messaages - just want to be sure it is completely plug and play - no cutting - no machining etc.
Thanks
Thanks
01 Disco 4.0 to 03 4.6 Engine Swap
- Thread starter roverdeals
- Start date
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In short, yes, plug and play. Use 4.0 heads and all componentry. Consider performance cam kit and having heads inspected and worked on... I would also have a trusted machine shop disassemble and inspect the motor. Replace anything necessary and have 'em reassemble. Get parts from D&D. Get hose kit from AB and Gasket set from RN.
I got F-D over on my 4.6L, so you may not feel it's necessary to have the engine broken down to bare bones, but I'm partial to this advice because of the circumstances surrounding my swap. It's up to you, but it sure as hell would make me feel better about it...
Don't go to all the trouble to have something happen and then have to turn around and take the motor back out to work on it... do it ALL now. Spending a little money in the short term may save your ass and your wallet in the long term...
In short, yes, plug and play. Use 4.0 heads and all componentry. Consider performance cam kit and having heads inspected and worked on... I would also have a trusted machine shop disassemble and inspect the motor. Replace anything necessary and have 'em reassemble. Get parts from D&D. Get hose kit from AB and Gasket set from RN.
I got F-D over on my 4.6L, so you may not feel it's necessary to have the engine broken down to bare bones, but I'm partial to this advice because of the circumstances surrounding my swap. It's up to you, but it sure as hell would make me feel better about it...
Don't go to all the trouble to have something happen and then have to turn around and take the motor back out to work on it... do it ALL now. Spending a little money in the short term may save your ass and your wallet in the long term...
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frickjp
Guest
Yes, it will bolt right in. No cutting, rigging, no duct tape necessary. Pull one out, put the other in. Use the existing wiring. If your 2001 did not have SAI ports, plug 'em. If yours already has it, you're in. 4.6 engine has no oil cooler, nor is the front cover plumbed for it, so simply leave it disconnected. If you absolutely feel the need to have an extra source of oil leakage, you will need to swap your existing front cover to hook it up. The ECU will learn to compensate for the 15% larger displacement, and adjust itself accordingly.
Expect your driving satisfaction to go up a bit, and your mileage to go down about a point.
I have personally done this on 3 occasions, and helped with several others, all with the same excellent, trouble-free results.
Expect your driving satisfaction to go up a bit, and your mileage to go down about a point.
I have personally done this on 3 occasions, and helped with several others, all with the same excellent, trouble-free results.
I got Fed over on my 4.6 originally on the sale. But I had the stealership put it in; and hilariously, that was the best decision. They WANTED to do it, go figure. Everything was gone through, and they gave me their cost plus 10% on the parts. Now every time I pull in, the techs want to see what I want to do next. LOL. Probably because at 110 an hour for the labor, they like my projects. Even with the downtime, frustration, and costs; I'd never look back. Won't buy another 4.0. P38 with 4.6, DI XD with 4.6 conversion, and DII G4 (04 w/ 4.6) all to come in the future. Can't beat the torque. Or the downshifts. lol.
frickjp said:
You sure it's not more than that? I think mine went down considerably more... probably other factors affecting that as well that I'm not considering, but I would think in general it would go down more than one point. I dunno though...
*Side note, Jeff: Don't hate me. I was actually looking into sending salmon out to you yesterday. Only problem is I'd have to overnight it, so I'm looking for something that is jarred and doesn't need refrigeration so I can send it 2-3 days. You were a great help and I do appreciate you sending me those port plugs at your own expense. I'll get you back. Thanks. Sorry it's taking so long...
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frickjp
Guest
Stuffing a stock 4.6 into the hole where a stock 4.0 was has reduced mileage by a point in 3 separate cases. The addition of all the other goodies, coupled with the added foot pressure because you have more power is why it seems worse.
Apples to apples, it goes down a point.
Going from my CUX 3.9 to a CUX 4.6, my mileage actually went up. I have 3 '95's, 1 completely stock, 1 in process, and mine is a 4.6. I can get around 17 on a great day with the stock one at around 80-85 on a trip. I can do the same with the 4.6 and 6,000 pounds. I got 16 tow-barring a Series 600 miles.
I'm doing a 4.6 in another '95 now, stock suspension and tire size, beefier trans, hopefully to tow the trail truck. It should be a decent comparison between an underpowered truck and a 4.6.
Apples to apples, it goes down a point.
Going from my CUX 3.9 to a CUX 4.6, my mileage actually went up. I have 3 '95's, 1 completely stock, 1 in process, and mine is a 4.6. I can get around 17 on a great day with the stock one at around 80-85 on a trip. I can do the same with the 4.6 and 6,000 pounds. I got 16 tow-barring a Series 600 miles.
I'm doing a 4.6 in another '95 now, stock suspension and tire size, beefier trans, hopefully to tow the trail truck. It should be a decent comparison between an underpowered truck and a 4.6.
Damn Jeff is still waiting on that salmon? There's gotta be some crazy private pilots out there willing to fly it across Canada.
I have about 500 miles on my 4.0 to 4.6 conversion and can say that the upgrade is a no brainer - engine does not work nearly as hard in the mountains as it did before! Regarding the ECU - I know I am stirring the pot here...............but not sure it is compensating or not. I feel a lot of hesitation in this engine until it gets above 2K rpm.
I have the exact same ECU problem with mine, and the dealer reprogrammed what parts of it which they could using their computer to flash it. They told me that it would compensate for roughly 80% of the differences; but that if I wanted the other 20%, and the check engine light to go out; then I would have to buy a used 4.6 ECU from a dismantler. Strange thing though, my mileage has gone up a point to a point and a half. I have roughly 4 k miles on it since the conversion, and every tank has been the same : 1 to 1.5 better. I've talked to several mechanics and rover specialists, and they have all had the same answer. The 50 extra ft. lbs. of torque allow the truck to get up to speed faster, and overcome the rolling resistance. With the 32's, lift, winch, and lockers, I'm still shy of stock mpg by at least 3 to 3.5 but better than I was with the 4.0.
Bahnstorm said:
Oh there's plenty of crazy pilots out here. With the unpredictable weather that we have, being crazy is a requirement to get your license. Jeff will get hooked up. There's no better quality salmon in the world than here... I may throw in some caribou jerky and smoked halibut too... :drool: