Pre facelift m20 into m40,

[bmw9818]

Just wondering if I will face any physical issues In dropping the lump in?

Also I was wondering if anyone knew how difficult it would be to convert the pre facelift engine to facelift management,

The ecu is -0261200073,

Also any issues in matching up wiring to my existing m40 fusebox and body loom? Is it as simple as plug and play, I've checked out a couple of threads one of them I've noticed to blank off a pin on the c101 plug that causes fire

Thanks

[Kedge]

Engine will drop straight in no problem, you'll want to be using the 325i gearbox, prop and ideally diff.

Here's all you need to know about the engine management swap (i can supply you all the parts you need to do it as well if needed).

http://www.e30zone.net/e30zonewiki/inde ... tronic_1.3

This also outlines all the wiring you'll need to do aswell, only 2 wires need touching and it's easier to do at the ECU end.

Pin20 on the C101 is the pin you need to be checking for the potential fire starter;

http://www.e30zone.net/modules.php?name ... ic&t=83367

HTH

[TDSCHRIS]

When putting a late engine into a early car
Pin 20 will most likely need blanking off
As on later cars it's a positive feed for abs out of the engine loom and the car loom has an earth on that pin
And I'm not sure if it will affect you or not but early cars have a separate plug for the fuel consumption gauge and tachometer under the drivers side of the dash
Where as later cars this go's through the c101 so if your tacho and mpg gauge are inop this is a likely cause
You may need to run a wire from pin 9 on the engine side of the c101 plug to pin 7 on the blue plug at the instrument cluster to get the tachometer working
And also from pin 8 at engine side of the c101 plug to pin 11 at the blue plug on the instrument cluster to get the fuel consumption gauge working

[Kedge]

Actually looking at the fact the OPs going from an M40 the facelift loom will just plug straight in, no need to touching wiring other than to check Pin20.

So going from a prefacelift M20 management system to facelift in a facelift car will be as per the Wiki but without any wiring for the intruments.

[Brianmoooore]

If the engine management is converted to facelift, then the only other wiring mod. that may be needed is to check for a brown wire connected to pin 20 of the C101 on the car side and to cut it off if it's there.

[bmw9818]

nice one thanks guys,

the wikis coming along nicely, it surprised me! guide is step by step and spot on! shit load of other info has come on since i last checked as well

[Grrrmachine]

[bmw9818]

(i can supply you all the parts you need to do it as well if needed).

dropped you a pm let me know thanks

[bmw9818]

this doesnt seem to be going as smooth as i hoped.... got a mate down to weld on the coolant expansion tank tab as the m40 engine bay doesnt have it and the relay hanger piece but came across a few issues

basicaly ive hardly even started firstly the fuse relay piece doesnt fit due to the airbox mount metal thingy is too wide this doesnt really bother me at the moment...

however the prefacelift rad also has different mounts

also the 325 airbox doesnt fit on the airbox mount... are the facelift 325 and pre ones different? im doing the 1.3 conversion as above so i can source a facelift one if it fits straight..

im a bit stuck at the moment tbh,

the coolant system is confusing me as well. i have a facelift 325 radiator so if anyone could please tell what i would need to convert the coolant system to facelift as i allready have a fairly new flift rad.... most of the pipes need to be changed as well.... water pump and cambelt kit,

going to get a new stat housing as well. so if it can be changed over..

thanks

[bmw9818]

just checked the wiki again! think the pipes i need are sorted, in terms of the water pump, thermostat throttle body.... is it all the same?

i need to get a facelift expansion tank

oh hold up what if i just buy samco sillicone hoses?