M54B22 to M54B25 swap
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The swap is pretty simple. Use realoem.com to look up parts on both engines and see which are different.
After the swap is complete and engine runs fine, I can remotely program the 2.5 DME software for you. See my thread for the details.
Need a DME or EGS flash update?
What I Do I'll remotely update the software in your DME (engine control module) or EGS (automatic transmission control module) to the latest BMW factory version for free using WinKFP. I've done over 500 of these for various friends and forum members over the years. Read the rest of this post...
www.e46fanatics.com
You can start the car and run at idle just fine. However the injectors will not deliver enough fuel on the old program. There is a possibility of engine damage....?
Get the program downloaded to a laptop & hook up with BaliDawg and change the program.
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Great! Thanks! Since i got a M54B25 from a 2001 E39 525i to swap on my 2001 E46 320ci M54B22 which i can purchase stand alone or with the complete engine wiring/ecu/ews + key (i assume that i dont need all above and only engine since the Ecu ews etc can be recoded)
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1,048 Posts
If the engine came out of the same platform (both E46) the wiring will be identical, with maybe some minor differences such as the wiring for ignition coils, meaning you "might" have to adjust 1 or 2 plugs.
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Yeah my swapped E46 is still in use. I have the 320ci gearbox (Getrag S5D 250G) in use behind my B30. The clutch on the 330i is slightly bigger so I bought a new one and threw out my old one.
I still have a ZF S5D 320Z from another 330i sitting here, ready to go in, but I'm waiting as I might have my eyes on a 6 speed swap in the near future.
I still have a ZF S5D 320Z from another 330i sitting here, ready to go in, but I'm waiting as I might have my eyes on a 6 speed swap in the near future.
You don’t have to swap engine harness, DME, EWS, keys, or any of that.
Check both donor and receiver cars on realoem.com for any parts you think may be different.
B25 engine will start and run on the B22 DME software. We can update it to B25 software when the swap is done.
Need a DME or EGS flash update?
What I Do I'll remotely update the software in your DME (engine control module) or EGS (automatic transmission control module) to the latest BMW factory version for free using WinKFP. I've done over 500 of these for various friends and forum members over the years. Read the rest of this post...
www.e46fanatics.com
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1,048 Posts
B30 also has different injectors, throttle body, DISA valve, ... Most 6 cilinders share the same parts with the exception of the 330i and M3.
Yes, if you get a complete engine. B30 intake parts are larger as you see.
The valve cover and coils changed in 2003, so just use the ones from the old engine if they differ.
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You cannot interchange the coils (or maybe you can if you switch over the valve cover). The electrical plugs are different from the old to the new coil harness, but that's nothing more than soddering 1 plug. I mean the plug that you plug into the DME/relay box.
My advice to OP was to use the valve cover and coils from his 320 and swap them over to the donor engine if different.
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whoops. I somehow missed the part where you also said the valve cover. Apologies!
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