Hey Guys, after 20 years of collecting vintage BMWs and restoring them, I finnaly bought the missing link; an E30 M3 :) The car has some minor issues that I'm curently trying to sort out as I learn my way around the S14 which is quite different to the inline 6 I'm used to...! So I would love to get your feedback on a few things.
I noted two issues that will need immediate attention.
1) The oil temp gauge goes to maximum after a minute of idling and the car starts to idle more roughly by then, which feels like missfires or fuel starvation. I did some research and ordered a replacement oil temp sensor which I'll replace this week.
2) The atmospheric pressure sensor is litteraly not there, so I assume this might contribute to the rough idle, combined with other factors...Altought I know that at sea level, the car can run fine without it too...
That's said, on the other side of the engine (passenger side) just behind the headlight plastic cover, an amateur did some damage... There's a black 3 wire plug that was hacked into. There is one single wire that was soldered on to this plug and it goes down along the engine block. At the moment it's hard to see where it connects to... But it goes near the thermostat housing from what I can see. More details to come...I suspect a couple things... Maybe the new aluminum rad is missing a temprature sensor and this plug was disconnected, but connected elsewhere to potentially cancel a CEL or something... I also noted what looks like a temperature probe on the t-stat housing behind the radiator with both wires coming out of it cut. There is a blue connector beside the black 3 wire connector that doesn't seem to be used... this is potentially the one that connected to this temp probe...I'm not sure. Those are all things that needs to be confirmed. (see photos)
Anyone has information on aluminum rad install that could point me in the right direction? Does the proceedure state that we need to disconnect or move wires around ?
Thanks !


I noted two issues that will need immediate attention.
1) The oil temp gauge goes to maximum after a minute of idling and the car starts to idle more roughly by then, which feels like missfires or fuel starvation. I did some research and ordered a replacement oil temp sensor which I'll replace this week.
2) The atmospheric pressure sensor is litteraly not there, so I assume this might contribute to the rough idle, combined with other factors...Altought I know that at sea level, the car can run fine without it too...
That's said, on the other side of the engine (passenger side) just behind the headlight plastic cover, an amateur did some damage... There's a black 3 wire plug that was hacked into. There is one single wire that was soldered on to this plug and it goes down along the engine block. At the moment it's hard to see where it connects to... But it goes near the thermostat housing from what I can see. More details to come...I suspect a couple things... Maybe the new aluminum rad is missing a temprature sensor and this plug was disconnected, but connected elsewhere to potentially cancel a CEL or something... I also noted what looks like a temperature probe on the t-stat housing behind the radiator with both wires coming out of it cut. There is a blue connector beside the black 3 wire connector that doesn't seem to be used... this is potentially the one that connected to this temp probe...I'm not sure. Those are all things that needs to be confirmed. (see photos)
Anyone has information on aluminum rad install that could point me in the right direction? Does the proceedure state that we need to disconnect or move wires around ?
Thanks !
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