2.0 M52 to 2.5 M50 Swap?

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driftescort

Active Member
Right the I am swapping out the 2.0 M52 Vanos engine in my E36 for a 2.5 M50 from a 1991 525 Sport.

I know the sumps need swapping and I also have the ECU and AFM.

Is there anything else I need or have to swap? Will I have to swap the E34loom for the E36 loom? Is there any other additional wiring required or should it all plug in?

Cheers:thumbs:
 
You pretty much have it spot on. Swap the sumps, use the 2.5s engine loom and ecu job jobbed.
The e34 loom might not fit where you want it as the ecu is in a different place to an e36 but im sure you can tidy that up once its in and running.
 
Right I got the 2.0 out today. I can see how the E34 loom will work in the E36 but there is something Im not sure of. On the loom with the E34 engine there is a a black 4-pin connector plug that dosent seem to plug into any other part of the loom, I assume it is plugged into something that is still with the car (which I dont have). What I want to know is can I just leave it un-plugged or is it supposed to connect to something?

Pics:

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I've got the engine in and have just done a quick check on the wiring. Should the E34 engine loom just plug into the E36 main plug or am I gonna have start swapping around pins?
 
But hopefully that I'll get a response since this thread is so old but I'm doing the same swap and I'm wondering if you ever finished it?
 
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