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Old 03-25-2007, 05:48 PM   #21
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Old 03-25-2007, 05:51 PM   #22
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Old 03-25-2007, 05:53 PM   #23
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Old 03-25-2007, 05:55 PM   #24
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Clicky for more info on the oil pump nut issue:

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Old 03-25-2007, 08:41 PM   #25
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Nice! What exactly are the plans?
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Old 03-25-2007, 10:22 PM   #26
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Nice! What exactly are the plans?
No clue...
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Old 03-26-2007, 09:44 AM   #27
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Clicky for more info on the oil pump nut issue:
Yep. That is kinda scary. This is a good thread. This and the Crevier BMW Race Car thread are pretty-much the only intereting things on this forum. Good luck with whatever the hell you are going to do.
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Old 03-26-2007, 11:35 PM   #28
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No clue...
what exactly is that nut?????
what would have happened if it came off???
jorge saca
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Old 03-26-2007, 11:40 PM   #29
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what exactly is that nut?????
what would have happened if it came off???
jorge saca
It holds the sprocket on that runs the oil pump. If the oil pump fails you lose oil pressure, and if you let the engine run for more than a few seconds after it comes off you'll seize your motor.
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Old 03-27-2007, 02:54 AM   #30
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good luck on your project!!
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Old 03-27-2007, 12:25 PM   #31
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thanks for the pix!!


btw, everyone should dissect your engine to check that nuts!
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Old 03-27-2007, 01:50 PM   #32
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Yep. That is kinda scary. This is a good thread. This and the Crevier BMW Race Car thread are pretty-much the only intereting things on this forum. Good luck with whatever the hell you are going to do.
Thanks!

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what exactly is that nut?????
what would have happened if it came off???
jorge saca
Just to expand on Greg's response:

The E46 has a lot of engine sensors, but NONE of them tell you exactly what is going on in real time. Yes the engine temperature has a gauge on the dash, but it is buffered for example. It has literally 3 positions; cold, normal, and hot. It doesn't move in real time when engine temperature changes.

Oil pressure is NOT monitored by the Engine Management System, however the oil level inside of the oil pan is monitored, as well as oil temperature. Neither of these sensors will trigger a fault code if the oil pump stops functioning. The only way to monitor oil pressure is to install an additional sensor and gauge.

The reality of the situation is that most people are too focused on driving the car when going fast, and completely ignore gauges even when they are installed within a person's field of view. Some people install huge red lights preset to go off when oil pressure drops. The sad thing is that most drivers then try to "limp" the car to the pits or their nearest shop, when the engine needs to be shut off imediately to save it.

So in this case, it's a matter of having a warning device and using it to take immediate action. Even with an upgraded oil pump, using an oil pressure gauge and emergency warning light is recomended.



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good luck on your project!!
Thanks, I'm having a lot of fun with it.
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Old 03-27-2007, 02:40 PM   #33
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Oil pressure is NOT monitored by the Engine Management System, however the oil level inside of the oil pan is monitored, as well as oil temperature.
I think the engine does monitor oil pressure, but I think only if it drops below a certain value. The oil light on the dashboard can be either yellow or red. The owners manual states that a red oil light means low oil pressure. This is only what I think based on what the owners manual states.

However, I don't have first hand knowledge where a pressure sensor is.
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Old 03-27-2007, 04:23 PM   #34
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I think the engine does monitor oil pressure, but I think only if it drops below a certain value. The oil light on the dashboard can be either yellow or red. The owners manual states that a red oil light means low oil pressure. This is only what I think based on what the owners manual states.

However, I don't have first hand knowledge where a pressure sensor is.
You are correct, there is an oil pressure sensor/switch mounted by the oil filter housing. If you follow the oil feed hose that is connected to the Vanos assembly on the head down to the back of the oil filter housing, you will see this sensor/switch mounted there. The way this device appears to work is that it triggers below a certain pressure threshold.

The sensors that I mentioned previously monitor the oil in real time (varying voltage output from the sensor) where the pressure switch appears to have an open or closed value.
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Old 03-27-2007, 07:53 PM   #35
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Even with an upgraded oil pump, using an oil pressure gauge and emergency warning light is recomended.
There's an a lot more expensive solution I'm working on .
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Old 03-27-2007, 08:09 PM   #36
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There's an a lot more expensive solution I'm working on .
Are we doing something similar?

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Old 03-28-2007, 11:49 AM   #37
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what exactly is that nut?????
what would have happened if it came off???
jorge saca
If the nut comes off your head gets oil starved, you drive train kills itself and your motor seizes -

http://forum.e46fanatics.com/showpos...9&postcount=79

http://forum.e46fanatics.com/showthr...=179608&page=5

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Old 03-28-2007, 06:34 PM   #38
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Are we doing something similar?

I dont know, are we?










































Yeah, we kinda sorta are.
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Old 03-28-2007, 09:42 PM   #39
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thanks for the info adam/ greg.....
i gotta install my oil press gauge soon...
keep up the good work
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Old 03-30-2007, 02:49 PM   #40
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Good to see that another E46 owner has the balls to work on his own car. I just can't understand why people would take their car to a shop and let all the mechanics have the fun. Keep us updated.
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