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E46 Xi Forum
The E46 XI was produced from 01-05 in sedan and touring body styles. Powered by either a 2.5L inline 6 in the 325xi or a 3.0L inline 6 330xi. Discuss all thing about BMW AWD E46 'Xi' here.

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Old 10-12-2014, 08:54 AM   #1
Tele
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Difference between 330XI & 330I engine

Hello All

As the title says, what is the difference between the 330XI and the 330I engine?
Other than the obvious; bellypan and maybe motormounts.

The reason for asking is becouse I'm thinking of buying a used 330 engine and doing some tuning on it (pistons, cams, headporting ect.) but it's much easier to find a 330I engine than it is finding a 330XI engine.
And the engine will of course eventually be going into my 330XI.

So what will I need to look out for?

Last edited by Tele; 10-12-2014 at 09:17 AM.
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Old 10-12-2014, 10:19 AM   #2
Kubica
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It's a direct swap. I plan on doing the same thing some day. Go for it.
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Old 10-12-2014, 10:29 AM   #3
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No difference at all. The differences in the I and XI are in suspension.
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Old 10-12-2014, 02:51 PM   #4
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Engine must fit direct, but difference starts in front drive.
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Old 10-12-2014, 03:17 PM   #5
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Great project I've considered. When swapping cams etc. the voodoo is in ECU programming. Brush up on software that allows timing, fuel mapping, etc. parameter tweaks. A super charger kit with a tight new engine might be a sweetheart?
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Old 10-13-2014, 07:26 PM   #6
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May be worth mentioning: The oil pan is different, because of the front diff/mid-shaft.
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Old 10-14-2014, 10:37 AM   #7
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Originally Posted by Solidjake View Post
No difference at all. The differences in the I and XI are in suspension.
...and...you know...the drive wheels.

Quote:
Originally Posted by White_Knuckles View Post
Great project I've considered. When swapping cams etc. the voodoo is in ECU programming. Brush up on software that allows timing, fuel mapping, etc. parameter tweaks. A super charger kit with a tight new engine might be a sweetheart?
Buying a supercharger kit with a tuning package = win.

OP should be able to flash a stock 330 tune onto the ECU and get the supercharger tune with the kit.
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Old 10-20-2014, 01:02 PM   #8
JDUTHIE
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is the oil pickup/pump the same tho? coulda sworn....
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Old 10-20-2014, 01:23 PM   #9
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is the oil pickup/pump the same tho? coulda sworn....
That's internal to the engine.

There are lots of differences if we're talking internals. Starting with the extra 0.5L of displacement.

Last edited by SamDoe1; 10-20-2014 at 01:23 PM.
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Old 10-20-2014, 02:50 PM   #10
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ohhh you guys are only talking in terms of fitting etc... gotcha!
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Old 10-21-2014, 12:18 PM   #11
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The headers for a 330xi have a different part number than all other e46s

It's weird because the 325xi uses the same headers as a regular rwd 325i or 330i. Every single m54 e46,
Doesn't matter if it's a coupe sedan or wagon or a 330 or 325 uses the same headers except the 330xo. The 330xi has the same headers as an x3. I have no clue what is different about them but I got a pair for my car when I did the 330 swap



Also yes the oil pickup tube is different on an AWD car. All that's needed is the pickup tube and pan from the AWD car and you can swap it onto any RWD motor
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Old 10-28-2014, 09:09 PM   #12
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That's internal to the engine.

There are lots of differences if we're talking internals. Starting with the extra 0.5L of displacement.
Wait , what? how is that possible?
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Old 10-29-2014, 05:47 PM   #13
JDUTHIE
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Wait , what? how is that possible?
BECAUSE SCIENCE!!!! naw its just got like an extra 5-6mm of stoke with different pistons... litterally different strokes for different folks BAHAHAHA m54b25 stokre = 84mm if im not wrong, and the m54b30/s52b32 = 89.6-90ish mm.
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Old 10-29-2014, 07:10 PM   #14
IxIFelIxI
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oh ok . i though xi's m54b30 had 0.5L more than i's m54b30 lol
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Old 10-29-2014, 07:39 PM   #15
SamDoe1
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oh ok . i though xi's m54b30 had 0.5L more than i's m54b30 lol
No. The difference is between the 325 and 330.
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