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How easy is it to take out a 4.6 GEMS for a 4.6 THOR?
P38A Engine swap
- Thread starter oakey
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Datatek
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Depends if you want to swap the electronics or not.
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Well we know it'll fit! Like @Datatek suggests, you'd be wise to take ALL the electronics too.
The loom will certainly be different, the ECU is mounted in a different place in the engine bay etc etc. The one thing I'd want to double-triple check is where the engine ECU might interface with the BECM. If you need to change the BECM too, surely it isn't worth it!
The loom will certainly be different, the ECU is mounted in a different place in the engine bay etc etc. The one thing I'd want to double-triple check is where the engine ECU might interface with the BECM. If you need to change the BECM too, surely it isn't worth it!
Datatek
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Best to swap the engine and keep the GEMS stuff. I don't know, but I suspect GEMS or Thor might just be an option setting as is the choice between diesel of petrol.
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Yes BECM has options for Petrol/Diesel as well as Auto/Manual.
@oakey Why do you want / need to swap the engine ??
Making a Thor engine become a GEMS (so you can keep existing wiring & ECU) is more of a faff, because you need to change Inlet manifold & bananas, throttle body & cable, cam & crank gears & sensor, MAF, plus crank sensor is mounted differently. also cruise cabling is different.
Swapping the whole lot will need all the correct looms, ECU, etc, but might be easiest.
@oakey Why do you want / need to swap the engine ??
Making a Thor engine become a GEMS (so you can keep existing wiring & ECU) is more of a faff, because you need to change Inlet manifold & bananas, throttle body & cable, cam & crank gears & sensor, MAF, plus crank sensor is mounted differently. also cruise cabling is different.
Swapping the whole lot will need all the correct looms, ECU, etc, but might be easiest.
I think we all agree physical spanner work its simple it fits.
Now the sparky bits
As above you will need the engine ECU and loom and god knows what else LR chucked in to trip peeps up.
As for if you need the BECM, I would say, from all my looking and reading, (so some could be a dream
) the immobilizer for the Gems V Thor are different the Thor is more like the diesel the Gems is different. (prepared to be corrected in my memory)
So as this signal for both comes from the BECM and the diesel and petrol (Gems) are different, well you can see how it gets difficult.
But I would also ask why the need to change?
J
Now the sparky bits
As above you will need the engine ECU and loom and god knows what else LR chucked in to trip peeps up.
As for if you need the BECM, I would say, from all my looking and reading, (so some could be a dream
) the immobilizer for the Gems V Thor are different the Thor is more like the diesel the Gems is different. (prepared to be corrected in my memory)So as this signal for both comes from the BECM and the diesel and petrol (Gems) are different, well you can see how it gets difficult.
But I would also ask why the need to change?
J
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Thank you for all your replies.
I am thinking of changing cos the GEMS is knackered and quoted approx 6k to replace with recon unit.
2. I may be able to get a donor vehicle with a THOR engine.
3. Seems a great pity to scrap a pretty good P38 but 6k is a lot of money
4 Even with a recon engine all the rest of the bits are still almost 30 years old
I am thinking of changing cos the GEMS is knackered and quoted approx 6k to replace with recon unit.
2. I may be able to get a donor vehicle with a THOR engine.
3. Seems a great pity to scrap a pretty good P38 but 6k is a lot of money
4 Even with a recon engine all the rest of the bits are still almost 30 years old
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My question would be how knackered ? Do the rebuild youyrself & just get any machining does elsewhere.
If you have a Thor donor with good engine, then you have all the parts required, but it's still quite a bit of work.
Regarding the BECM questions, there's a setting in Nanocom to select the engine ECU type:
And for the oil burners:
If you have a Thor donor with good engine, then you have all the parts required, but it's still quite a bit of work.
Regarding the BECM questions, there's a setting in Nanocom to select the engine ECU type:
And for the oil burners:
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I think we all agree physical spanner work its simple it fits.
Now the sparky bits
As above you will need the engine ECU and loom and god knows what else LR chucked in to trip peeps up.
As for if you need the BECM, I would say, from all my looking and reading, (so some could be a dream
So as this signal for both comes from the BECM and the diesel and petrol (Gems) are different, well you can see how it gets difficult.
But I would also ask why the need to change?
J
You are correct on the BECM. While I can see a Thor era BECM might be backwards compatible and have options for EDC and GEMS, I would doubt a GEMS BECM would have an option for an engine type that hadn't been invented at the time of manufacture. Maybe near the crossover year but I doubt it.
HEVAC is different in the Thor wiring too.
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Both my P38 are 1998 reg, but probably 97 manufacture. To be sure, we either need someone with older P38 & Nanocom to connect & see ? . . . . . or the OP to do the swap & document the fun !!
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Wellll,,,,,,,, methinks is a bad idea.
Thanks for help folks but going to do something else not sure what yet lol
Thanks for help folks but going to do something else not sure what yet lol
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How old does it have to be to not need an MOT?
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40 years as long as no major changes made ie chassis. See dvla website for full list
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Not long now……. She might make it!
