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BMW M3 Coupe S85B50 V10

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Considering that our vanos pump was inoperative, it was decided to remove the vanos. This decision was prompted, firstly, by the fact that buying a used pump is a lottery, and their prices are not cheap. A new pump costs about more than 1,500 euros, moreover, it is not known in what condition the vanos themselves are, and their cost is also not small. And secondly, as I wrote in one of the previous parts, according to the experience of other S85 owners, even more power can be removed without them.


Split gears were made from the original drives of the vanos with the ability to mechanically adjust the position of the camshafts.




We put the shafts along the valve overlaps.




Vanos covers were made on a milling machine







There were a lot of shavings))).




The result is the following installation kit:



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The removal of the vanos, which I wrote about in the previous part, brought another very big plus: the work on installing the radiator and its pipes was much easier due to the fact that the engine in the places of the vanos became much shorter.


I had to think a lot about the radiator. It was immediately decided to make a custom radiator. There were two main problems:


• Firstly, for the base, it was necessary to select from catalogs the largest radiator that fits into the E30 in size


• Secondly, the original radiator from S85 consists of 2 separate radiators and it was necessary to make a decision whether to repeat this scheme or make one radiator for 2 heads.


We did not understand exactly why the original S85 radiator was divided into 2 radiators, (like to reduce the pressure), but in order to avoid problems with fluid circulation, it was decided to repeat this scheme.


A radiator from an M3 E46 was chosen as the basis; it almost ideally fit in size and was available in Moscow.







It was before the new year and an order from Europe would have to wait at least a month. The original side plastic tanks were removed from the radiator






and welded aluminum.




We made the bends for the pipes and welded them.




The hoses from the S85 were shortened, tubes were inserted in the middle, and they fit perfectly into place.





Bearbeitet: von sergey_e30
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Great progress man!!! 



24V 16V Ringtool mit Eigenbauzelle, M5X Turbo, LS3 Mittelmotor, MAXXECU, M3e92 DKG, usw: http://goo.gl/RZ3aML



Kennfeldoptimierung für Z20 LET / Opel / Phase 1-3 /

Bremsenadapter 312mm & 4 Kolben, RX7 Bremse

Einzelteilkonstruktionen [CAD/CAM] u. Fertigung

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Next, we moved on to making the engine wiring.






It was decided to preserve the factory look under the hood as much as possible, so the wiring for the ABIT was remade from the original S85 wiring. Several days of work and the initial version of the wiring was ready. Also, changes were made to the algorithm of the operation of some parts, for example, the engine cooling fan at 1st and 2nd speed will be turned on by a signal from ABIT, the air conditioner pump clutch will also be activated from the engine control unit with the ability to turn off when the gas pedal is pressed to the maximum to increase power ...






To obtain maximum information about the operation of the engine, a broadband oxygen sensor and an EGT sensor (exhaust gas temperature sensor) were installed in each of the engine halves.


Also, an oil temperature and pressure sensor was installed in the oil filter housing.


Installed a coolant temperature sensor.


We installed M50 throttle position sensors, and we also had to make adapters for them.

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Maybe someone can help me with my project?


Still looking for:


I need a few original details from M3 E30 for my project:

Front left bumper bracket M3 E30

Front a-pillar trim M3 E30


I have attached a photo of these parts, if not clear. A friend of mine in Munich can buy them for me if there are difficulties with shipping to Russia







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Those who have read the previous parts will remember that the vanos pump was almost completely destroyed.




But it was not possible to simply throw it out of this engine, since the main oil pump is driven through it and therefore it was necessary to bring it back to life so that it could function simply as a transmission mechanism.


The pump housing was restored on the machine, the seizures were removed.







We made the inside and assembled it.







Now oil is supplied to it only for its lubrication, the outputs are closed, a new gear was installed.



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  • 2 Wochen später...
  • 3 Wochen später...
  • 2 Wochen später...

So, everything is ready for the first launch. Of course, there were some small mistakes, they re-pinned a couple of connectors on the wiring and the engine started working !!!




At first there was a small knock of hydraulic compensators, which is not surprising after almost a year of inactivity, I even climbed to see the price of new ones, almost had time to faint, but after a couple of minutes the knock disappeared.




It responds perfectly to gas !!! Doesn't smoke, at all !!!






We are all very happy, we need to finish the brakes, wiring, assemble the body and run it first on the road, and then to the dynamometer to find out how much power we got and whether we managed to reach the factory performance.

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  • 5 Wochen später...

After launch, for a while, nothing particularly interesting happened. We picked up the front end a little and, to the great joy, the hood closed without any problems.






We made air intakes from the air filters, sawing off the native headlight shields. In the photo, the shields are old and dirty, they were used for fitting, in the final version it will be all new.

















We adjusted the wiring shields, it turned out well, it gradually becomes beautiful under the hood)))






We fixed the engine control units to the brackets from the turbodiesel, where there are also two engine control units






Almost everything is ready for tuning the engine on the road

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