DIY: In depth M52/S52 OBD2 swap
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i would like to add that Z3M arms are compatible and are exactly the same as 325i/is/m3 arms. -
I have easier solution for this, no welding required. Leave the E34 dipstick alone. Cut the nipple from E36 oil dipstick about two inches. Measure the girth then use same size drill bit and dril a hole on the oil pan just near the dipstick hole then insert E36 nipple and put some jb weld to seal it. You would want to drill the oil pan before it is put on the engine.
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Just a quick one re: the coolant temp sender.
Is there any reason why you can't just run a simple stand-alone circuit from the sender to the cluster?Leave a comment:
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hi guys.
i know i need to take a wire from pin 14 on x20 to my cluster to get the VSS for my m52 ecu, but i don't know where.
yes, in the cruise control housing, but where..i only have 5 holes, i don't have the green plug.
thanks for allLast edited by Mr Mpower; 10-21-2014, 04:19 AM.Leave a comment:
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Awesome write up. Thanks so much for writing this thread; it was my inspiration for the OBD2 M52 swap I finished a couple weeks back.Leave a comment:
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Can anyone confirm that this is the correct hose to connect the heater core to the back of the cylinder head? http://www.ecstuning.com/ES177878/Leave a comment:
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To answer my own question: No idea. I used a piece of 3/4" hose that fit on the spider tube on the engine, and then stretched the crap out of it to fit over the nipple on the expansion tank. I'd love to buy an actual hose that fit, though.Leave a comment:
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Thanks for the great write-up! Hopefully do this soon. Just gotta find the space.Leave a comment:
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The original post said "Expansion tank to metal pipe: cut piece of long S52 hose".
Anybody know WHICH long s52 hose? I don't have any of them and this is holding me up. They are, of course, different diameters.Leave a comment:
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I'm thinking nobody has responded because your question is SO basic that it'll just be the first of a thousand. You need to do MUCH more reading, and definitely need to spend some quality time with your e30 before considering a swap. I've owned mine for three years and this swap is certainly nothing I would've wanted to tackle in the first couple of months of ownership.
To answer: BMW puts the speed sensor where it actually makes sense, the ring gear in the differential.Leave a comment:

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