Secondary air pump system, pump relay and monitoring
List of components removed with my programming: Rear 02 sensors are not required with my programming. You can see here the S52/M52 exhaust manifolds with 02 sensors installed, then the lines wired to the block so that they don’t touch the manifolds. As you can see in the photo dual vanos engine package installed, and you see the plastic DME holder with relays, that’s how you should get your engine, if you get it with harness all cut up then it may be a problem getting the right harness. I am also using E46 power steering lines without cooler. That’s about it, the rest is the same as if you were doing M50 swap. Remote fuel pressure regulator must be installed, 96+ E36 one also works and that’s what I am using.
Thermostat outlet lines, just cut the clamps and remove quick connects from the E46 hoses and plug them on the thermostat housing then cut to fit E36 radiator hoses, hoses must be Gates brand. AC compressor will have to be triggered manually the same way it is with M50 swaps.
#Dme ms42 pinout install
I am not running heater lines on my engine, but if you have to, the rear one will plug in just fine, you have the install a T on the front outlet then run it back to the heater and the other side of the T to the radiator bottle. There is a fuel tank vent hose that plugs in the back of the manifold, that needs to be plugged, then you just run the fuel tank vent line to recirculating valve that is located behind oil filter housing You will need exhaust manifolds from 96-99 E36 as well as the engine mounting brackets, E46 stuff does not fit, it is too big. So MS42 and MS43 and almost the same, and M52TU and M54 is basically the same engine. It is still electronic throttle, cable only operates two wish sensors inside the body. 99-00 MS42 engines will work with E34 throttle cable but the end of it needs to be shaped into a ball to fit the throttle linkage. Also fat wire from starter needs to go to battery 12+, also don’t forget to run one power wire from battery + outlet to the fuse box.ĭME location can be left there to sit on top of the fuse box but it does not look pretty. There will also be a ground wire brown color that you must bolt to the chassis ground. That is it for X60004 connector, no need to connect any other wiresĮngine temperature sensor will have to be wired independently and installed somewhere on the cooling system. The DME and Injectors relay is already integrated into MS42/MS43 harness.ġ: alternator charge indicator signal, ħ: ground wire for electronic pedal to pin 1 Ĩ: electronic pedal signal to pin 4 ġ0: fuel pump relay activation ground wire ġ1: oil pressure warning light ġ4: voltage supply for pedal to pin 3 You will have to wire fuel pump relay the same way it is on E36, it is just basic 5 pin light green relay. The dual 2 pin connectors with red wires are all 12+ constant battery Your engine harness will have few connectors that plug into chassis and those are:Ģ: switched 12+ from ignition switch (red/white wire) this turns on DME relayģ: reverse light switch on transmission (yellow/blue wire)Ĥ: reverse light switch on transmission (white/green wire)ġ: starter run wire from ignition switch (black wire)Ģ: oil level sensor switched 12+ from ignition switch (brown/green wire)
This thread will focus on wiring and engine management system only. The rest of the components is pretty much the same as doing M50 swap. You will also need electronic gas pedal with electrical plug from donor car if you have MS43 dme engine. This is why I am posting the wiring information here.Īssuming you bought some good 99-04 dual vanos engine with complete harness and ecu with relay tray, and want to do a swap into your E30, you will also need X60004 harness plug that goes from the DME to chassis of donor car, the rest of the wiring is pretty much integrated with the engine. In my case I did the swap to E36, other than the known differences regarding swap the wiring effort is the same as if I did it to E30. These dual vanos engines are getting cheaper and gaining popularity in getting them swapped into E30, E36 or some other BMW. I am able to program MS42 and MS43 engine computers from E46 so that M52TU and M54 engines can be swapped into other chassis with minimal wiring effort.
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