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3-Series (E46, E90) Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.

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Old 03-03-2012, 06:12 PM   #1 (permalink)
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Oil light dont shut off for 2 minutes after engine is on

My oil light don't shut of when when i start my engine. Can this be a bad sign, i just had engine replaced and took car from shop.
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Old 03-03-2012, 06:18 PM   #2 (permalink)
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Check the amount of oil in the engine.
It could be a bad oil pump taking its time to develop proper pressure, or a faulty oil pressure sensor. Is the engine noisey when you start it up and progressively quietens down after running for a while?
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Old 03-04-2012, 09:34 AM   #3 (permalink)
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As Brett says...
Just to add, what viscosity oil is in there? To thin oil would give weak pressure !
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Old 03-04-2012, 01:02 PM   #4 (permalink)
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Why this sensor is so expensive i've seen on rockauto for ~160. Is there way to test it like measure resistance in my old sensor or can i take it out and clean it?

Will oil run out when i take the sensor off?
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Old 03-05-2012, 01:41 PM   #5 (permalink)
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Another problem that could be a possible issue. I hate to be the one to bring up worse case scenario. Your new engine. Is it new or rebuilt used? And if so a possibiltiy might be to much bearing clearence. Does your oil light flicker from time to time? I don't think your oil sensor might be an issue (But yes please check this to make sure it is working correctly). If the oil sensor is bad sometimes some manufactures will design into the system that the car will not start. A fail safe preventing someone starting and running the car with no oil pressure.
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Old 03-06-2012, 02:54 PM   #6 (permalink)
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Yeah, good idea Shaun... But wouldn't the Big-ends knock like a postman at startup?
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Old 03-07-2012, 02:38 PM   #7 (permalink)
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Yep it sure will knock.....if there was no pressure. However he still has some pressure. I am betting on the fact that after the engine wars up. Pressure returns to normal.
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