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E46 Engine Swaps
Replacing your motor? From direct replacements to more exoctic engines, if it's going under the hood of an E46 3 Series this is the forum to discuss it.

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Old 05-31-2019, 06:07 AM   #1
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Join Date: Oct 2017
Location: Orange County
Posts: 63
My Ride: 2000 328i E46, 2002
Swap M54B28 for M54B30

So Iíve got a 00í 328 sitting in the drive way for a few years in the need of an engine.
Hereís my post when it all went down ..

E46: Death of an M52

So Basicly Iím not trying to get rid of it, Iíd really like to get it running again so Iíve gotta few questions on engine options. For one, which ones are compatible. Iíd defiantly like to upgrade to a 3.0. But what else would fit. ??
Also I need to push this along so Iím just going to dive in it. Iíve got pretty basic mechanical skill and assisted on a couple engine swaps. But never on my own. Dose any one have any tips or advice. Maybe a detailed procedure to read up on? Will I need any special tools? And during installation, is it just plug in and play? Whatís this I hear of flashing the DME? Can I do it myself? And how? Iíve also considered swapping the tranny with a 6 speed manual. Can this be easily done? Which fit? And what other new parts will I bead for the modification!i appreciate any knowledge any one can pass Iíll keep posting if progress begins. Thanks in advance!
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Old 06-29-2019, 06:39 AM   #2
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Join Date: May 2017
Location: Boston
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My Ride: '05 330CiC
I haven't done it, but I believe you can upgrade to an M54 3.0 engine. You would likely have to use the B28 intake, manifold, throttle body, which will reduce some of your power gains.

IMO you are definitely better off finding a good used M52TUB28 (like the one you have) and swapping it in.
- easy plug and play
- better power (HP/ torque) than the M54B25
- much fewer problems with oil consumption...most used M54B30's consume a lot of oil these days due to a bad ring design
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Old 06-29-2019, 06:55 AM   #3
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Join Date: Oct 2017
Location: Orange County
Posts: 63
My Ride: 2000 328i E46, 2002
Thanks for the advice. I think your right. Iíve put it off this long for a swap I canít imagine Iíd get it done any sooner if I made it more complicated

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