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Old 07-01-2018, 05:06 PM   #1
Projectvoltron
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Default M52 Swap Questions

Whats up everyone. I am new to he BMW scene and I am excited to do something with my newly acquired 318ti. I have done some motor swaps in all kinds of other cars including my current Audi.

I got my 97 318ti 5 speed M sport package for $100 and all it needed was a battery and started up. The radiator was leaking so I bought a new one and It has been a champ ever since. The car Is clean as far as body damage is concerned. It doesn't have clear coat on the hood or roof is the main thing wrong. Also the front seat are in poor shape. Everything else works and is in clean shape.

I have an opportunity to get a 328i auto with a bad transmission for a decent deal. I am thinking this will be a good doner car for a 318ti transplant. The car starts up and runs just fine.

I do have a few questions that I have not yet been able to figure out.

Will there be any issues using the Auto engine in my manual ti? I have read some conflicting things on this subject so I would like to get a straight answer.

I will obviously need to swap the dme, ews, and key ring/key chip. Is that all plug and play?

Last question, for now, is will the stock TI transmission bolt up to the m52 and the stock driveshaft should compress enough to fit with the diff. Is this correct? I have read that this setup will last for a while until I can get a different drivetrain setup. I will get a clutch that can withstand the power difference also,

Thanks for looking and thank you for all the help!
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Old 07-01-2018, 06:15 PM   #2
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Auto engine is fine in manual car. The 328i harness will be auto though so you may need to cut a few wires/disregard some.The M44's Getrag will work behind the M52. Heck, even the 4cyl clutch would work for a short time. An M52 isn't a torque monster so depending on what you're using the car for the Getrag will last. I have a 300K Getrag that has spent the majority of it's life behind a 6cyl getting romped on the street and it has 0 issues. Now it's behind S52 with all the bolt ons and still no issues.

I'll look at the wiring but there are a few threads that discuss that here and on BFC.
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Old 07-01-2018, 06:45 PM   #3
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Quote:
Originally Posted by ZEK View Post
Auto engine is fine in manual car. The 328i harness will be auto though so you may need to cut a few wires/disregard some.The M44's Getrag will work behind the M52. Heck, even the 4cyl clutch would work for a short time. An M52 isn't a torque monster so depending on what you're using the car for the Getrag will last. I have a 300K Getrag that has spent the majority of it's life behind a 6cyl getting romped on the street and it has 0 issues. Now it's behind S52 with all the bolt ons and still no issues.

I'll look at the wiring but there are a few threads that discuss that here and on BFC.
Thanks for the reply!

I guess that was more of my question is what would I have to do to the wiring harness to get the auto engine harness to get it to work with my manual ti.

Also will the cluster(from the sober car) read incorrectly if there is anything disconnected on the auto harness?
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Old 07-02-2018, 04:01 PM   #4
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My M52 came from an automatic car and went into my manual 318ti.

The wiring diagrams are all available on the internet but the major difference is that the auto harness does not have a reverse light plug to go into the manual transmission. I was able to find the proper pins and wiring and I added that plug to my wiring harness.

The big transmission control unit connector can be tucked inside the ecu compartment. Then the other auto transmission cables can be wrapped up and zip tied down near the side of the block.

I've been running the getrag behind my M52 since the swap two years ago.
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