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First, srry for English, underneath will be a German translation from google translate.
I have a 728i E38 with "28 6S 2" engine and semi-auto 5 gear transmission. Here is my question: How hard is it, and how much would it cost to replace this engine with a 3.0 "N54/N55 B30A" from F01 series and 6/8 gear semi-auto transmission? Is this possible at all?
Thanks in advance, best regards
Google Translate:
'Ich habe einen 728i E38 mit "28 6S 2" Motor und semi-auto 5-Gang-Getriebe. Hier ist meine Frage: Wie schwer ist es, und wie viel würde es kosten, diesen Motor mit einem 3,0 "N54/N55 B30A" oder "N55 B30" ersetzen von F01-Serie und semi-auto 6/8-Gang-Getriebe? Ist das überhaupt möglich?
And if I somehow have both cars, let's say the E38 in ok condition, and from car crash F01? I presume that there are different mounting holes on both engines?
What is with electronics, is it hard to change?
I am el.ing., and I have few friends that can help me with mechanics.
Cheers...
Google translate:
'Und wenn ich irgendwie beide Autos habe, sagen wir die E38 in guten Zustand, und F01 aus eine Autounfall? Ich nehme an, dass verschiedene befestigung Bohrungen auf beiden Motoren sind?
Was ist mit der Elektronik, ist es schwer zu ändern?
Ich bin El.Ing., und ich habe Freunde, die mi mit der Mechanik helfen kann.
If you actually do have an F01 (not only the engine) it's possible but highly complex.
I would go that far to say, that is has never been done before.
Foreseeable Problems (Questions):
-Do Engine Mounts fit? If not -> Welding
-Do Transmission Mounts fit?
-crankshaft?
-You will have to wire alot!
-You will have (most likely) to use nearly the complete electrical system (because e38 communicates (mostly) via K-Line and F01 uses exclusively Can
which means (at least): Engine ECU, Transmission ECU, electronical imobilisation systems, Instrument Cluster, ABS/DSC. And probably every ECU the Engine communicats with.
-You will have to swap the exhaust systems (NOX cats etc.)
-what will happen with the keys?
-i think some ecus need information from the navigation systems, (or at least a GPS receiver)
-i would calculate at least with 3days work of diagnostics, to find out what's needed to be done to get everything to work, and at least 3days of coding.
In addition, there will be alot of unforeseeable problems.
If you want a "better" straigt-6 engine, find a 3L-M54 from a e39/e46. You will only need to swap Engine, Engine ECU, and Imobilisation ECU. everything else is codale (quite simple)
As far as i know, you can get a 6speed semi-automatic drive from a pre-facelift e60 and bolt it up to the engine (which is also codable)
In general, I'd second Andimp3's message. The reasons why such an idea will be very expensive and generally difficult to execute are diverse: as you already mentioned, all the mountings and holders of the engine, the transmission and its peripheral stuff like the alternator, starter, air condition compressor etc. will not fit at all. After that, you'd have to change and convert all the electrical and electronical components of your safety and probably suspension systems like anti-lock brake system, dynamic stability control, electronic damper control etc. to make all the 'new' ECU's/ECM's happy, too. And last but not least, you'd most likely need new parts of the drivetrain from the transmission back to the differential, therefore new transmission shaft being suitable for the new transmission, probably a new differential and some new drive shafts, all individually produced to fit the E38 while copping with the power of the new engine, if all that cannot be done with parts from a regular 740i or 750i.
I'm not saying that it's impossible to do, but you'd need tons of money and manpower to do that conversion mechanically, electrically, electronically and get all that stuff to work safely in the end.
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Zitat:
Zitat von Roland Rottenfußer
Nehmen wir die Pflicht, nur mit Feinstaubplakette in eine deutsche Innenstadt einzufahren. Übertragen auf andere Delikte bedeutet dies: Man dürfte sich nur dann im öffentlichen Raum bewegen, wenn man sich das polizeiliche Führungszeugnis auf die Stirn klebt. Wer nicht vorab beweist, kein Mörder zu sein, wird verfolgt und bestraft wie ein Mörder. Ein Paradigmenwechsel von der Unschulds- zur Schuldvermutung.