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3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

 
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#1 (permalink) Old 07-24-2004, 08:13 AM
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I just replaced the radiator on my (to me) 1998 323i. Before and particular since this, check-control tells me to the check the coolant level. I took it back to the mechanic and he indeed noticed the coolant level was too low and one of the clamps to the heater hose was not tight. Coolant was added and the clamp was tightened, but the light still goes on. Has anybody had similar problems? Is the computer “overly” sensitive (as my mechanic suggests) or do I have a con-tinued problem?? Ray
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#2 (permalink) Old 07-24-2004, 10:15 AM
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Yes, overtime many of the onboard sensors become overly so. The level can be easily checked. If you find it is at the right level, and your sensor persists, change the sensor.

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#3 (permalink) Old 07-24-2004, 10:50 AM
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drive it for a bit, and if it doesnt go away like jllphan said, then your problem has to be the sensor


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#4 (permalink) Old 07-24-2004, 12:57 PM
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I have a 6/92 325i that had the same problem. The coolant level was fine and the car didn't get hot (even in Phoenix in the summer). A new sensor fixed the problem.
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#5 (permalink) Old 07-24-2004, 02:32 PM
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Seems like a popular problem on all the message boards ghead .

This is what happens when the factory seal leaks water to the reed relay inside the sensor body .

Note that the rad coolant does not cause this problem its from water and corrosion attacking from outside the bottom of the sensor where the large plastic nut is.

I just went through the same problem with my 92 e36 325i.

Change the sensor if jiggling the float in the overflow tank doesn't solve the problem.

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