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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 04-14-2009, 09:57 AM   #1
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Join Date: May 2008
Location: Virginia
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My Ride: 01 330 Ci
Post Coolant Light Problem

I just replaced the water pump along with a new expansion tank and a new sensor. But the light keeps turning on during a cold start then turns off after the car is all warmed up. The coolant level is all full. I asked some people they said there must be an air pocket in the system causing to turn on. CAN ANYONE SHED SOME LIGHT WITH MY PROBLEM PLEASE!! THANKS!!!
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Old 04-14-2009, 11:00 AM   #2
Join Date: Mar 2009
Location: Colorado
Posts: 884
My Ride: '02 330xi
First step is to re-bleed the system. You may just be running a little low. As coolant heats up, it expands.
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Old 04-16-2009, 02:36 PM   #3
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I have the same problem, I taken it to the engineer and he told me about how Soft pipes are not good for the circulation! however I drove it a few times before and the pipes seem to be pretty hard when the cars warmed up!
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