Temp Gauge Staying in the Blue; What Do I Do? - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 05-08-2009, 10:25 AM
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Temp Gauge Staying in the Blue; What Do I Do?

So I notice while driving today that the temperature, according to the gauge, never leaves the blue mark. I disconnected what I believe was the Temperature Sending Unit, started the car, the Temp Gauge still flickered and held a line above being dead. Am I wrong that the TSU is on the passenger side of the Radiator? I mean, there is a probe stuck into the Radiator and it has a plug in it.

Popular opinion is that the thermostat must be stuck open. I've ordered a new 180 degree thermostat along with a new aluminum housing.

Until I get to the repair, is there an inherent problem with driving the car with the Temp never getting above the blue?
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#2 (permalink) Old 05-08-2009, 10:30 AM
OMFG another one!?
 
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If you can avoid driving it that cool, do it. Running too cool will cause higher emissions and may foul your O2 sensors.

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#3 (permalink) Old 05-10-2009, 11:30 AM
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As luck would have it, it has started working normally again - a few hours after ordering replacement parts. I'll replace the Thermostat and Housing anyway; next time it sticks open.

1995 325i, 143k, Auto, Alpine White

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