[help needed] 1998 BMW V12 engine M73

What engine are you torturing? Is it inside some car?
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russian
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1998 BMW V12 engine M73

Post by russian » Sun Oct 06, 2019 7:41 pm

I would like to thank everyone who has pitched in some $$$ into this crazy v12 idea. 8 months after I first found it for sale, I own this engine and it's now at my garage.

https://github.com/rusefi/rusefi_docume ... MW_e38_750
http://bmwfans.info/vin/decoder?vin=dh69849
online TIS - wiring diagrams

VIN wbagk232xwdh69849
This bundle has a 5HP30 transmission looks like 88 Pin TCM.

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Re: 1998 BMW V12 engine M73

Post by stefanst » Sun Oct 06, 2019 10:10 pm

Holy S&%t!

Congratulations.

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Re: 1998 BMW V12 engine M73

Post by russian » Sun Oct 06, 2019 10:38 pm

pre-purchase inspection this morning engine was starting, gauge cluster was showing some red and orange lights around 1:28



current status: no lights on gauge cluster, no cranking - only cluster back light, so there is SOME electricity in the wires

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Re: 1998 BMW V12 engine M73

Post by russian » Sun Oct 06, 2019 10:56 pm

And it has started! it's about f&%king with the key just right...

Which is a f&%king scary thing since that's about security :(
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Re: 1998 BMW V12 engine M73

Post by stefanst » Sun Oct 06, 2019 11:26 pm

I shall assume that's the immobilizer messing with you.

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Re: 1998 BMW V12 engine M73

Post by Abricos » Mon Oct 07, 2019 12:27 am

Missing power or gnd ... Or bad contact ... check all connections with a multimeter

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Re: 1998 BMW V12 engine M73

Post by puff » Mon Oct 07, 2019 7:32 am

!congrats!

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Re: 1998 BMW V12 engine M73

Post by mk e » Mon Oct 07, 2019 5:45 pm

Nice!

Engine like that are big and heavy though so I suggest you put in a miata straight away to roll it a round...On a dolly, I meant put it on a dolly straight away :)

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Re: 1998 BMW V12 engine M73

Post by russian » Mon Oct 07, 2019 10:53 pm

VIN decoder says this car was BMW 317, Orient Blue Metallic / ORIENTBLAU METALLIC (317) - so, it's not black like in the national hit movie, but it's the right model!



https://en.wikipedia.org/wiki/Bimmer_(film)
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Re: 1998 BMW V12 engine M73

Post by russian » Mon Oct 07, 2019 11:12 pm

First funny ha-ha moment: there is some metal oil canister on the side, so for transportation we've used some metal wire to hook-up this canister to some random bolt on the engine.

Next thing I've connected battery and attempted to start engine.

What did we use to mount oil canister? We've used spare positive terminal to mount whatever canister with a piece of steel wire.
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Re: 1998 BMW V12 engine M73

Post by OrchardPerformance » Tue Oct 08, 2019 9:55 am

The transmission is the same Bosch 88pin plug as the ECU. (good source of cheap 88pin ecu side plugs as they are hard to get).

You might be able to get away with using the transmission ECU from a 530/540 or 740 v8, as far as I am aware it is nearly identical but check the ETK.
The unit comes up as unique but it may just be the tuning.
I can dig if you want?
Edit - Did a check, the control valve setup in the transmission is shared with the M62 V8 in the 540 and 740 so a transmission ECU from one of those should work.
http://bmwfans.info/parts-catalog/24341423761/

Manual transmissions for these are tricky, best options are conversion plates to take ZF boxes from the 530 diesel.

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Re: 1998 BMW V12 engine M73

Post by OrchardPerformance » Tue Oct 08, 2019 12:03 pm


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Re: 1998 BMW V12 engine M73

Post by russian » Wed Oct 09, 2019 7:28 am

My bundle included complete steering column, good thing I've realized that I probably have steering angle sensor there before I threw it all away!

One day I will find out what is that sensor wired to, but for now I am in the world of custom fan removal tools :) Need to put A/C compressor back on the car to get water pump running. Considering how many little things I have to fix I've created a separate tracking project for that.

First order of business is getting coolant circulating, maybe also start building a better rolling cart for the engine.

https://github.com/rusefi/M73_test_mule/issues/1
https://github.com/rusefi/M73_test_mule/issues/2
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Re: 1998 BMW V12 engine M73

Post by DonaldBecker » Wed Oct 09, 2019 11:47 am

The steering angle sensor is for the DSC (Dynamic Stability Control) system -- ABS that figures out which direction you wanted to head. It hooks to the K-line diagnostic wire but does most of its reporting over CAN bus.
The data used only by the DSC control module.
IIRC, the 7 series DSC had an enhancement that provided steering input/feedback through the power steering rack to help a driver avoid over-steer. But that's probably unrelated to the upper steering column.
Last edited by DonaldBecker on Wed Oct 09, 2019 2:44 pm, edited 2 times in total.

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Re: 1998 BMW V12 engine M73

Post by mk e » Wed Oct 09, 2019 12:50 pm

russian wrote:
Wed Oct 09, 2019 7:28 am
First order of business is getting coolant circulating, maybe also start building a better rolling cart for the engine.
If only you had something good and sturdy that could hold the engine, radiator, move it around the shop....oh and maybe allow some load testing......hmmmm.....how to design such a thing...... :)

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Re: 1998 BMW V12 engine M73

Post by russian » Fri Oct 11, 2019 2:13 am

Rolling engine crate, $130.

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Re: 1998 BMW V12 engine M73

Post by russian » Fri Oct 11, 2019 4:27 am

Fuel filter was made in June of 1998. Car seems to have 170,000 miles - I think the fuel filter did good.
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Re: 1998 BMW V12 engine M73

Post by kb1gtt » Fri Oct 11, 2019 8:56 am

One step closer to showing up these folks?
Welcome to the friendlier side of internet crazy :)

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Re: 1998 BMW V12 engine M73

Post by russian » Sat Oct 12, 2019 7:03 am

Looks like radiator is leaking :( That's a bummer. Wow, cheapest one is $60 shipped that's a surprise. 17111702969

Engine is still starting, tachometer is working but engine does not rev. That's pretty scary, maybe ECU is in some limping mode :(

But first I really need to cut a lot of wires. Need to find diagrams of these relay and fuse blocks.

Oh, and at some point I would need to mount some mufflers for sure.
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Re: 1998 BMW V12 engine M73

Post by russian » Sat Oct 12, 2019 1:03 pm

Looks like this is a very sweet link https://www.drive2.ru/l/525842811447150000/

Planning to remove:

K118 Air-pump relay
https://www.newtis.info/tisv2/a/en/e38- ... ay/V9Cxutr
https://www.newtis.info/tisv2/a/en/e38- ... ay/sBLDhS1


K6304 Secondary air pump relay
https://www.newtis.info/tisv2/a/en/e38- ... ay/UqtxouZ

Wiper Relay I
https://www.newtis.info/tisv2/a/en/e38- ... -i/V5d96wA
https://www.newtis.info/tisv2/a/en/e38- ... -i/l13DRsK

Wiper Relay II
https://www.newtis.info/tisv2/a/en/e38- ... ii/V7DiI0P
https://www.newtis.info/tisv2/a/en/e38- ... ii/kslhH73


EDC4 VDO Electronic Dampening Control Module
37.15-1 095 094
https://www.newtis.info/tisv2/a/en/e38- ... it/Z4LTGH7

Light Lamp Control Module 61.35-8 372 875

From https://www.bimmerforums.com/forum/show ... schematics
If you know the German/English translation of colors...the wire color abbreviations become easier to interpret
braun BR = brown
blau BL = blue
rot RT = red
gelb GE = yellow
grau GR = gray
schwarz SW = black
weiss (weiß ) WS = white
grun GN = green
orange OR = orange
rosa RS = pink
violett VI = violet
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Re: 1998 BMW V12 engine M73

Post by russian » Sat Oct 12, 2019 11:55 pm

https://www.bimmerfest.com/forums/archi ... 62198.html pedal adaptation procedure:
1. Turn ignition to position 2, wait 3-5 seconds
2. Push the throttle pedal all the way down and activate kick down switch, hold it for 3-5 seconds
3. Let off the pedal completely, wait 3-5 seconds
4. Push the throttle pedal all the way down and activate kick down switch, hold it for 3-5 seconds
5. Let off the pedal completely, wait 3-5 seconds
6. Turn off ignition, wait at least 10 seconds.
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Re: 1998 BMW V12 engine M73

Post by russian » Sun Oct 13, 2019 1:56 am

Still no throttle response :( kick-down sensor mounted. It only has one wire, I've grounded mount point just in case it wants GND. With one wire is it VR? Hall? Magic?

I follow pedal adaptation procedure (see video) and yet engine still does not rev. Starts great! Zero throttle response :(

Any ideas?




Just a status update video

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Re: 1998 BMW V12 engine M73

Post by russian » Sun Oct 13, 2019 2:00 am

PS: this is called "EML IIIS "

Wiring diagram available at https://www.newtis.info/tisv2/a/en/e38- ... it/n6JvaOj
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Re: 1998 BMW V12 engine M73

Post by mk e » Sun Oct 13, 2019 12:06 pm

russian wrote:
Sun Oct 13, 2019 1:56 am
Any ideas?
BMW electronics aren't known as being user friendly....my car (2011 328xi) starts and drives just fine but nearly every single dash warning light is on....I gave up trying to figure it out and will replace the car once the police on my commute realize how expired the inspection is because I don't know how to fix it.

I'd say you know the engine runs so why keep messing with that mess of wires? The plan is to hook it to you're ecu so stick to the plan and get t work turning that mess int a harness you can use.

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Re: 1998 BMW V12 engine M73

Post by puff » Sun Oct 13, 2019 12:17 pm

Indeed, what's the purpose? You want to sniff the signals?
I'd suggest finding Haynes repair manual (if there is one for that car) - from my experience, it's the most extensive source of information.
As for the video, I'd say it was more than 5 seconds for each operation.
Have you checked your wiring? Do you see the signal change on the connector?

"Push the throttle pedal all the way down and activate kick down switch, hold it for 3-5 seconds"

On the video I don't see how kick down switch is activated...

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Re: 1998 BMW V12 engine M73

Post by russian » Sun Oct 13, 2019 1:11 pm

mk e wrote:
Sun Oct 13, 2019 12:06 pm
I'd say you know the engine runs so why keep messing with that mess of wires?
If it's easy to fix I believe it's worth fixing. I would like to see the gearbox shifting and that probably required not just idle to see it shifting into more gears?
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Re: 1998 BMW V12 engine M73

Post by russian » Sun Oct 13, 2019 5:13 pm

This was just a mechanical switch - this engine is revving now!

Next step is to get transmission to spin the output shaft

Also funny how Lighting Control Module is required for cranking :)




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Re: 1998 BMW V12 engine M73

Post by russian » Sun Oct 13, 2019 7:28 pm

There is an opinion that the mechanical cable from the transmission selector should be connected to the transmission :)

I have the cable, I have #1 and #2 mounting hardware but I do not have the cable mounting bracket :( Starting to look for cable mounting bracket part number.

https://tis.bmwcats.com/doc1001361/
https://www.bmwcats.com/bmw/E38/47533/L ... 2xwdh69849
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