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General E46 Forum
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Old 11-28-2012, 01:12 AM   #1
wan_cubby
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2000 323i to 328i M52TU Engine swap

Hi all
I have 2000 323i and going to swap engine and put in 328, i read many forums and people says that it is easyest way and i don't need to replace any other parts except to reflash ECU, i need to know that The transmission and differential will be working on a new engine? Anyone done this kind of work?

P.S. i have an automatic transmission
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Old 11-28-2012, 05:09 AM   #2
Alex323Ci
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the 99/2000 E46 M52TU engines are the same for the most part between 2.5L and 2.8L.
just don't get an M54 3.0L, as that if you're absolutely clueless with cost you major $$$ and a many many months to swap. as a matter of fact the cost can be higher than buying a new low mileage 330-ZHP and adding a new supercharger. true story
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Old 11-28-2012, 06:01 AM   #3
wan_cubby
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thanks alex
after engine swap, transmission and differential will be working fine? or i have to replace both?
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Old 11-28-2012, 06:53 AM   #4
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Although my engine swap is nothing to brag about
(Especially when compare to more exotic swap like the s54), I am one of the few members on here that have completed a engine swap.

Alex has no idea what he is talking about. He has never tried/attempted an engine swap before.


Anyhow....

A 328 swap will be 100% plug and play. Your transmission will also work. The 328 may or may not use the same tranny as your 323 but dropping in the 328 into your 323 is very direct and will work regardless of your tranny. No need to worry about differential. Like u said, just update yout dme.

Heck, if u can find a good price on a 330, u can even drop in a 330 engine and it will still work (like I have). Your performance will be higher than a
328 but lower than a 330 cuz of the tune. I decided to take a short cut and run my 330zhp engine with a 328 dme.

Huh? U r crazy and I heard it won't work.

I posted my dynos and data for my long and short term fuel Trims to shut down annoying haters like Alex. Your dme will be able to adjust to the larger displacement.
Therefore, I will say go for it!

Now back to my good friend Alex, since I proved him wrong on the engine swap (as well as other BMW related debates) he is now taking pot shots at my project by saying it took too long and was way out of budget.

1) took to long. FALSE.
Swapping a 330 engine or a 328 engine will take the same amount of time. My project took almost a year because I ended doing two engine swap at the same time, decided to do a full facelift conversion and of course I got pregnant and gave birth.

2) too expensive. FALSE. If u can buy a 330 engine cheaper or the same price as a 328 then I saw go with the bigger engine. The only way this project can hurt your pocket is whether u want to do a full 330 conversion or whether u just want a functional car (no check engine light) but u r willing to sacrifice some engine performance.

I personally like the 330swap idea (if u could get a good deal on the engine) because u will get a better performance by doing the same exact thing u would do on a 328 swap.


NOTE: if u want to do a proper 330 swap (similar to buying a 330 from the dealership) then things can be expensive if u can't get your parts for cheap. However, as I have proven on my engine swap thread it is possible to run a 330 engine while using your 323 injectors, maf, throttle body, transmission, etc

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Last edited by flashmeow; 11-28-2012 at 03:19 PM.
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Old 11-28-2012, 07:03 AM   #5
wan_cubby
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thanks man of course 330 idea is better but it needs more works more time and more money
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Old 11-28-2012, 07:15 AM   #6
flashmeow
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Not true....

Assuming u can get a 330 engine for the same price as a 328....

The cost difference between the two is $75. That is the cost to buy a throttle body adapter plate to mount your cable driven TB onto the 330 intake manifold.

The time difference is : None

Seriously...if u can dropped in all of your 323 components into the 330 and just flash your dme to 328 and just call it a day

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Old 11-28-2012, 07:31 AM   #7
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Hey Flash, which throttle plat adapter did you use? The m50 (i think?) that is offered by TMS? Was thinking of buying an M54 manifold and doing the swap on my m52 engine for fun and have just been gathering little tid bits of info as I go along.
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Old 11-28-2012, 07:36 AM   #8
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Quote:
Originally Posted by moiz21 View Post
Hey Flash, which throttle plat adapter did you use? The m50 (i think?) that is offered by TMS? Was thinking of buying an M54 manifold and doing the swap on my m52 engine for fun and have just been gathering little tid bits of info as I go along.
Do u have an m52tu or just an m52? The good news is that turner motorsports sells both.

Your intake manifold swap will be very fun to do and u will gain a few HP on the upper range. I did a manifold swap and posted pix and before and after dynos

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Old 11-28-2012, 07:59 AM   #9
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I have an m52. From my searches, all I've been able to find is an M50 throttle plate adapter. This one: http://www.turnermotorsport.com/p-42...ter-plate.aspx
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Old 11-28-2012, 08:07 AM   #10
flashmeow
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I guess I was wrong on the m52 plate.

For the m52tu plate, I bought the #851 model

http://www.turnermotorsport.com/p-43...-manifold.aspx

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Old 11-28-2012, 08:16 AM   #11
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Nevermind, I do have the TU. So I'm good to go with the plate you linked me to. Thanks!
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Last edited by moiz21; 11-28-2012 at 08:24 AM.
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Old 11-28-2012, 10:05 AM   #12
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This is great to know. I have a 323 and would love to do this swap using my existing hardware. But what about the clutch? Do I need to change that?

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Old 11-28-2012, 11:03 AM   #13
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This is great to know. I have a 323 and would love to do this swap using my existing hardware. But what about the clutch? Do I need to change that?

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Clutch is basically a transmission part so no you dont need to do it , just use your old flywheel(thought it would be a good time to replace the flywheel+clutch with new parts)

Also when having the engine out of the car be sure to do something to the OPN so your engine can live long

The M54(330) and M52tu are just about thesame with different external parts , which are completly interchangeable.

Easiest way is to do like flash said , get M54B30 and put on the M52tu intake+throttle+etc parts.

Be sure to check what sensors are used for CPS/CAS since early 323/328 used a different sensor(and since you're updating the DME you do NOT want to move these over)

I've had my M52 out of the car once , the M54 twice.
The good thing from this is that im no longer afraid of pulling the engine I pulled it the last time for a clutch that had crapped out (and found out alot of horrors by doing it)
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Old 11-29-2012, 08:58 AM   #14
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Posts stripped. Keep this on topic for the OP or don't post. I'm tired of petty bickering between a few members.

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Old 11-29-2012, 02:39 PM   #15
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Like I said the M52TU 2.5L (323 engine) and M52TU 2.8L (328 engine) are basically the exact same. It will be the easiest and hassle free swap for you. diff & trans will be fine.

yes you can swap in an M54 3.0L (330 engine) or (2.5L 325 engine) as well. it has been done for many years by forum members, but a little more involved. a dedicated DIYer or good shop can do it within reasonable time and costs.

and yes I have done engine swaps since I was a teenager and even built my first Balanced & Blueprinted engine from scratch before 20.

hope you get your car back up quickly
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Old 12-04-2012, 02:28 PM   #16
warriorpluto
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Quote:
Originally Posted by SweTurbo View Post
Clutch is basically a transmission part so no you dont need to do it , just use your old flywheel(thought it would be a good time to replace the flywheel+clutch with new parts)

Also when having the engine out of the car be sure to do something to the OPN so your engine can live long

The M54(330) and M52tu are just about thesame with different external parts , which are completly interchangeable.

Easiest way is to do like flash said , get M54B30 and put on the M52tu intake+throttle+etc parts.

Be sure to check what sensors are used for CPS/CAS since early 323/328 used a different sensor(and since you're updating the DME you do NOT want to move these over)

I've had my M52 out of the car once , the M54 twice.
The good thing from this is that im no longer afraid of pulling the engine I pulled it the last time for a clutch that had crapped out (and found out alot of horrors by doing it)
Thanks for the information but I'm curious as to why you pulled engine for a clutch job? Was it knocking mimicking engine knock?

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Old 01-09-2013, 02:22 PM   #17
Lezz21
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Hey guys! I'm preparing to tackle this same exact swap on my 1999 e46 323i. it has a over 150,000 miles on it. will the 2.8L stress out the tranny (that gm 4speed auto)? also is it a COMPLETELY DIRECT SWAP including the difference of BOSCH and SIEMENS ecu's?
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