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E36 (1991 - 1999)
The E36 chassis 3-Series BMW was a huge hit among driving enthusiasts from the first moment the car hit the pavement. The E36 won numerous awards over the years it was produced and is still a favorite of many BMW enthusiasts to this day! -- View the E36 Wiki

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  #1  
Old 12-22-2012, 02:18 PM
Boosted318i Boosted318i is offline
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Mein Auto: 1997 BMW 318i
2.5L into a 318i

So I have posted before with no direct answer. Have some extra money and I'm tired of the lack of power my 318i has. I was going sell it dirt cheap and buy something else. But my question is.

How much work would it be to take the motor and tranny out of a 325i and put into my 318i. Do the motor mounts line up will I need the ECU out of the 325 as well. How big of a project am I looking at here? Thanks for taking the time to read and respond.
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  #2  
Old 12-23-2012, 04:48 AM
kmorgan_260 kmorgan_260 is offline
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The tranny is the same so you only need swap the motor. My 318 has a 325 tranny and the only difference was the output flange which I just swapped over. And yes you will need the ECU. And it is quite a project. Unless you are especially attached to this car I would suggest selling and buying the 325/M3 that you want.
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  #3  
Old 12-24-2012, 02:44 PM
hnaz hnaz is online now
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Well if the tranny and so forth is the same as the 325, then why is it a chore? I have a 1996 318i and I am thinking about putting in a 328 motor in it, with ECU. I figured the wiring and everything is the same, just need to change out the motor, ECU, fuel distributor, radiator, clutch fan, and starter motor.
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  #4  
Old 12-24-2012, 02:57 PM
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If you have the engine with all accesories (as in how it was in the car from factory) "everything there" then its not bad at all. Could do in a days time. I swapped entire running gear from m3 (dme, engine, tranny, exhaust, differential, driveshaft etc) and had running in 3 days with 2 others help.
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  #5  
Old 12-24-2012, 03:06 PM
hnaz hnaz is online now
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Oh man, I wish I could convert my 96 318 into an M3. It would be great since I would keep the 318i badge on the car and keep it stock. I am very attached to my 318i namely because it was in immaculate condition when I purchased it. It still is!

But I figure a 328 motor would be just as good and slightly cheaper. I forgot about changing out the exhaust as well. :P So if I were to put a list together, I guess the following would be needed (I guess this will help the OP as well in approaching the same project I am thinking about):

-6 cyl engine of choice
-radiator
-matching ECU to the engine that came from the donor car
-exhaust
-fuel distributor from donor car
-new hoses
-definitely new seals, hoses, and water pump (might as well take care if them in one fell swoop)
-starter motor
-O2 sensors
-new belt and alternator

Anything else?

-Harry
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  #6  
Old 12-24-2012, 05:11 PM
kmorgan_260 kmorgan_260 is offline
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I believe the starter and alternator is the same, at least the bolt pattern is. As for how much a chore it is, I guess one man's chore is another's hobby so it probably isn't that bad. It took me several days to swap tranny's but I didn't have a helper and wasn't in a hurry. Also the more you do a particular job the more little short cuts you learn. Good luck!
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  #7  
Old 12-24-2012, 05:34 PM
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I belive a cluster swap might also be needed. If I remember correctly, 318 clusters are ratio'd differently and rpms will read way out of proportion.

Not necesary but would be nice if you plan on doing everything.
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  #8  
Old 12-24-2012, 06:17 PM
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yeah, the cluster will need to be changed over.

as for the o2 sensor though, the signal is the same, 0-1v, so unless the plug is different, you shouldn't need to 'change it out' for a swap to work.

however, swapping the 6 cyl exhaust would be a great time to put a fresh sensor in.

and when you say fuel distributor, do you mean as in the old bosch style continuous injection mechanical injectors?? bmw hasn't used that sort of set since, what, the e21??




df
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  #9  
Old 12-24-2012, 06:35 PM
kmorgan_260 kmorgan_260 is offline
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Quote:
Originally Posted by drivinfaster View Post

and when you say fuel distributor, do you mean as in the old bosch style continuous injection mechanical injectors?? bmw hasn't used that sort of set since, what, the e21??

df
Yea, I wondered about that too. I thought maybe he was referring to the fuel pressure regulator that is different from the early to later model e36s, but not sure.
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  #10  
Old 12-25-2012, 04:56 AM
durtyMD durtyMD is offline
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I thought you were thinking of turning a 2.5 into a 318 by the title. I really like the thought of you keeping the body/interior that you're happy with and upgrading the motor.

Have you thought about what your time is worth and using that money to get a dedicated track car to go fast and keep your 30+ mpg 318 for a dd?
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  #11  
Old 12-26-2012, 05:20 AM
hnaz hnaz is online now
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Yep, that is my stupidity. Fuel pressure regulator. My apologies.

As far as turning a 318 into a 2.5L, would that even be possible? I saw that there used to be turbo kits and superchargers for the 318, then all of the sudden the companies either lost interest or just disappeared.
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  #12  
Old 12-26-2012, 05:46 AM
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If by turning a 318 in a 2.5 liter you mean dropping in an I6 engine in place of it, yes it very doable. Look back at post #4 to this thread. Jesse's done it with his and if you do a search through this forum you'll find others that have too.
Downing Atlanta made the SC kits for the 318, but the company that made the superchargers dropped that model so they had to stop selling the kits. You'll occasionally see a used kit for sale but they're typically in the $2K-$3K range.
For the I6 swap your best bet is to start looking for a donor car to buy, one where the interior and/or body is trashed but the drive train is still in decent shape.
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  #13  
Old 12-26-2012, 06:56 AM
hnaz hnaz is online now
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Quote:
Originally Posted by dc_wright View Post
If by turning a 318 in a 2.5 liter you mean dropping in an I6 engine in place of it, yes it very doable. Look back at post #4 to this thread. Jesse's done it with his and if you do a search through this forum you'll find others that have too.
Downing Atlanta made the SC kits for the 318, but the company that made the superchargers dropped that model so they had to stop selling the kits. You'll occasionally see a used kit for sale but they're typically in the $2K-$3K range.
For the I6 swap your best bet is to start looking for a donor car to buy, one where the interior and/or body is trashed but the drive train is still in decent shape.
Ahh yes, I took your advice and saw a few posts about this kind of swap being done.

I gotta look for a 328i 96 - pre-99 for my car. I found a 94 325i last month, but it was OBD I. I would have done the job gleefully, but going from OBD II to OBD I would be an emissions nightmare when I go in for emissions testing. Plus I think it would be illegal in my state.

But in terms of going 2.5L, I was thinking maybe bore the head out and get larger pistons, but the cost of doing that would be more expensive than just getting a donor car from the junk yard.
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  #14  
Old 12-26-2012, 07:17 AM
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I still have the 318 radiator and car has never went above 12 o'clock with my m3 drivetrain....just the hoses are a tad different.
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  #15  
Old 12-26-2012, 07:49 AM
hnaz hnaz is online now
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Quote:
Originally Posted by B1MM3R View Post
I still have the 318 radiator and car has never went above 12 o'clock with my m3 drivetrain....just the hoses are a tad different.
Ahh, good to know!
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  #16  
Old 12-26-2012, 12:18 PM
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Quote:
Originally Posted by hnaz View Post

But in terms of going 2.5L, I was thinking maybe bore the head out and get larger pistons, but the cost of doing that would be more expensive than just getting a donor car from the junk yard.
Even with a stroker kit and larger pistons about 2 liters is what you'll get and it will cost you about the same or more as swapping in the I6. The good news is the I6 will still have a lot of potential for more HP while the stroker 1.8L will be maxed out.
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  #17  
Old 12-26-2012, 12:56 PM
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well, turbo'ing is also a way to get more out of the m42/44, but, yeah...straight up it's pricey to make a bmw fast(er).

that being said, when i looked into it, the m10 block was bored out bigger to become the s14 block, and the m42/44 blocks are the generation after the m10 (according to wiki & a few other sources). the head is different from the s14 to the m42/44, but, if i connect the dots...

chip put an m4x head on an m5x block and it lined up...

sooo, if this were the case, i would think that if i were to try it, the s14 cams would fit in the m42/44 head??

gonna do some research, but it does look to be promising.

oh, and vac has *all* sorts of go fast goodies...



df
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  #18  
Old 12-26-2012, 01:54 PM
hnaz hnaz is online now
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Quote:
Originally Posted by drivinfaster View Post
well, turbo'ing is also a way to get more out of the m42/44, but, yeah...straight up it's pricey to make a bmw fast(er).

that being said, when i looked into it, the m10 block was bored out bigger to become the s14 block, and the m42/44 blocks are the generation after the m10 (according to wiki & a few other sources). the head is different from the s14 to the m42/44, but, if i connect the dots...

chip put an m4x head on an m5x block and it lined up...

sooo, if this were the case, i would think that if i were to try it, the s14 cams would fit in the m42/44 head??

gonna do some research, but it does look to be promising.

oh, and vac has *all* sorts of go fast goodies...



df
Here is a purty little thing I found on VAC's website for the M42/44 engines:

http://store.vacmotorsports.com/vac-...ers-p2391.aspx



But no downpipe or exhaust to accommodate this bad boy. But if I were to price it out, it would still be better if I find myself a hocked 96 - 99 328i and just do a swap.

Here is some more stuff I found off VAC's website:

http://store.vacmotorsports.com/cate...px?Keyword=M44
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  #19  
Old 12-26-2012, 04:03 PM
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russian318is russian318is is offline
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I'm about to attempt this swap myself.

I'm Allowing two weeks knowing my luck with this car.

I have a full donor car but it is auto so at the moment I'm am research how to "bridge" the auto into thinking its in "N" all the time to start.

I have tried to research for a step by step for this but haven't found one, can anyone help with a link?

the donor car is built '92 and my car is '94 any issues there as they both as ews"I" not "II" correct?

other than the ecu and engine loom what other wiring/electrics needs to be changed?

Can any one confirm 100% that the manual gear box from the 318is will bolt up to the 325is block?

I am doing a full rear cradle swap but since my tail shaft is from a 4 to a small case diff where the donor has auto to large case diff will i need a new tail shaft?

thanks in advance.
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