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Glad to hear about your oil pressure gauge install - I have purchased an oil temp gauge and would like to know how and where, you connected the sending unit. A picture would be great.
Thanks,
I may be wrong but I believe you can also have oil pressure reading from the RPM display if you select the available options.
ummmmmm ... don't think so ..... and even the SCANGAUGE can't do this one. It is not an OBDII item for monitoring and requires a 'physical' sensor someplace. The most common place for a GEN1 car was an adaptor between the oil pan and the bung, since the plug faced back - and you could then run a tube from the oil pan to the gauge. But with GEN2 cars the bung was on the bottom of the pan so this became a BAD option .... so the search for a new place began
ummmmmm ... don't think so ..... and even the SCANGAUGE can't do this one. It is not an OBDII item for monitoring and requires a 'physical' sensor someplace. The most common place for a GEN1 car was an adaptor between the oil pan and the bung, since the plug faced back - and you could then run a tube from the oil pan to the gauge. But with GEN2 cars the bung was on the bottom of the pan so this became a BAD option .... so the search for a new place began
I'm sure I'll be corrected if I'm wrong ....
I'm pretty sure that Capt_BJ is correct (as usual). I have a CravenSpeed adapter, but haven't installed it yet.
Correct we do not have an oil pressure sensor, only a low oil pressure switch. Crave Speed makes an adapter for the oil pressure switch that you can use to attach sensors to.
I know, I am resurrecting an old thread but, I have Bimmerlink installed on my phone and my Android head unit. I connected to the ODBII with a K+DCAN cable and to the USB of my of my head unit. In Bimmerlink you can setup a dashboard with different sensor values. One of the available ones was oil pressure. I set it up and it was working.
There must be something that is sending that data. I know Torque didn't bring it up when I used it to connect using a cheap ELM327 Bluetooth adapter. I haven't tried my Veepeak adapter to see if perhaps it does with it. Problem there is my head unit cannot see the VeePeak and I haven't been able to make Torque Pro work with the K+DCAN cable.
The N18 does have a pressure sensor as opposed to the pressure switch in the N14. On the N18 the oil pressure is controlled by the DME based on temperature and rpm. A pressure sensor is required for that control to be closed loop..
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I just installed the Cravenspeed oil pressure sensor on my N16 engine as part of their dual gauge installation kit, more to follow on that in my 2013 Coupe build thread elsewhere. Anyway, what I'm seeing is 21-25 psi at idle, 30-35 psi at cruise, and spikes up to 60 psi when stomping on it.
Similar values to what I see on my physical gauge.
I was just curious as had I been able to view it with the Torque App, I wouldn't have added the oil pressure and coolant temp gauges. Unfortunately, I didn't have Bimmerlink when I installed the gauges and it doesn't let you customize the dashboard like Torque.
BTW, there is a X-gauge that will read oil pressure on the N18 using a Scan Gauge II. I set it up but it and BimmerLink both report 14-15 PSI higher than my physical gauge. Interesting thing about it is it reads 14-15 PSI with the engine off power on so at least it is consistent.
Broke out my old Scan Gauge II to monitor boost and thought I would setup the oil pressure also.
Hmm. Based on my reading, the oil pressure sensor for the N18 engine, OEM part number 12617592532, looks to be identical to the sensor the the N16 engine, with the same part number. So if the X-gauge Scan Gauge II add-on to read oil pressure is only specified to work on an N18 engine, something else must be different in the engine electronics from the N16 engine, as the sensor part is identical between the two.
Oil Pressure Switch for N16/N18 engine, OEM part #12617592532
For what it's worth, the oil pressure switch for the N12/N14 engines is a different beast, OEM part number 12617568481:
Oil Pressure Switch for N12/N14 engine, OEM Part #12617568481
A pressure switch is more of a binary device, measuring an on/off state, which makes sense if its function is to illuminate the oil pressure warning light if the oil pressure drops below a certain level. By contrast, and in this context, a pressure sensor is actually measuring a pressure differential between two points, say 0-100 psi (for example). So the fact that the same pressure sensor is used on the two engines could explain why the X-gauge Scan Gauge II could show an actual oil pressure reading if it's used on an N16 engine, despite it's being rated only for the N18 engine. Whether that oil pressure reading has any validity when the unit is used on an N16 engine is TBD.
Last edited by kerwooddr; Jul 23, 2022 at 01:00 AM.
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