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3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

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Old 08-25-2009, 01:09 AM   #1 (permalink)
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325es motor swap to 325is suggestions need

Um.... getting ready to swap my 1986 325es motor with an 1988 325is motor i know that the trans are diffrent and air flow meter is diffrent just wondering if the drive shafts are the same or not or if yall want to give me a heads up on anything i might be over looking or any suggestions would be nice.
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Old 08-25-2009, 01:15 AM   #2 (permalink)
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Um.... getting ready to swap my 1986 325es motor with an 1988 325is motor i know that the trans are diffrent and air flow meter is diffrent just wondering if the drive shafts are the same or not or if yall want to give me a heads up on anything i might be over looking or any suggestions would be nice.


but why?

http://www.bimmerwerkz.com/forum/3-s...rev-65829.html

you will run into probs unless you know what you are doing.
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Old 08-25-2009, 01:20 AM   #3 (permalink)
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The es motor is gone and was looking to upgrade to a little more horse power and rev limit and the 325is motors are capable of more performance upgrades in the long run. i know that im going to have to change out the wiring harness and also the brain but im really looking forward to doing the swap

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Old 08-25-2009, 01:29 AM   #4 (permalink)
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sorry to threadjack but can you get the numbers off the computer since im down to 2 options as to what is wrong with my motor and i dont really know the year of the computer but its a 6 pin and looking thru the manual its a 6 pin but i think yours will have more, i just want to see if i could swap with yours since i havent thought of an easy way of testing the crank sensor in the distributor.
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Old 08-25-2009, 01:49 AM   #5 (permalink)
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The es motor is gone and was looking to upgrade to a little more horse power and rev limit and the 325is motors are capable of more performance upgrades in the long run. i know that im going to have to change out the wiring harness and also the brain but im really looking forward to doing the swap
ok. if you do that.. make sure you have a matched set.

there are also other tips from past posts/threads if you scroll below.

:good luck

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Old 08-25-2009, 03:36 PM   #6 (permalink)
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Good luck with the swap. It will be a tough swap but you will be so satisfied when you are done.
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Old 08-25-2009, 04:01 PM   #7 (permalink)
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sorry to threadjack but can you get the numbers off the computer since im down to 2 options as to what is wrong with my motor and i dont really know the year of the computer but its a 6 pin and looking thru the manual its a 6 pin but i think yours will have more, i just want to see if i could swap with yours since i havent thought of an easy way of testing the crank sensor in the distributor.
I'm not too familiar with the 1979 320; but i am sure the DME/ECU is a totally different computer from the 325i .

I think the 1979 still used the "KUGELFISCHER" system or the Bosch K-Jetronic system.... Later models use the MOTRONIC system.

FYI : crankshaft sensor can be tested using DVOM. Theoretically, you should have a resistance of 1280 ohms +/- 10%. In practice, even a 550 ohm reading is still ok.
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Old 08-25-2009, 04:07 PM   #8 (permalink)
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i like my bmw since its a 320-6 body (i checked the number on the web) the engine i think is a 528e somewhere around 85 to whenever they stopped using the m20, and it has a carbuetor intake on it and having some difficulty identifing the wiring harness which by my guess and my dad's is similar to a '81 528i
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Old 08-25-2009, 06:00 PM   #9 (permalink)
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i like my bmw since its a 320-6 body (i checked the number on the web) the engine i think is a 528e somewhere around 85 to whenever they stopped using the m20, and it has a carbuetor intake on it and having some difficulty identifing the wiring harness which by my guess and my dad's is similar to a '81 528i
i suggest you start a new thread. That way u don't cloud the other fellow's issues
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Old 08-26-2009, 09:38 AM   #10 (permalink)
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Dont do it! look at my posts of all problems ive had 86 325e with a 88is engine.
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Old 08-27-2009, 01:38 AM   #11 (permalink)
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Ok i checked ur post out did u ever figure out anything with the key situation and y it wasnt staing started and did u have to change out the hole harness and what did u figure out about the air flow
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Old 08-27-2009, 01:38 PM   #12 (permalink)
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Yes the silinoid was sticking,No you can plug the 88 ecu into the 86 harness (worked for me)The airflow not sure about as i dont have a dvom.Just take your time if you are going to do it.Change the oil pan gasket why its out, lot easier.PM me if i can help any.
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