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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 09-01-2014, 03:37 PM   #1
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Join Date: Sep 2014
Location: Stockton Ca
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My Ride: 2001 bmw 330i
e46 330i overheating. Please help

I had recently purchased a 2001 bmw 330i that i toiught was in fine condition. after day 2 of driving, it started overheating. I changed the thermostat, fan clutch, radiator, and coolant resevor. i think I bleed the vehicle properly. It can blow cold ac or hot air, whichever i need. but the problem is when I change from using the ac to heat, or change from using heat to ac, the temperature will rise from normal to pass normal. Then if Change back to what ever I was using first, heat or cold, the temperature comes back down. Sometimes not all the way. Could it be the water pump? or what? any suggestions will be appreciated.

See, I used nothing but ac for two days. One early morning I took the car out and used heat becuase the weather was cold. Then it started overheating. so I was missing with it today, and figured out how when it will stars to over heat.
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Old 09-01-2014, 03:40 PM   #2
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Are you losing coolant?
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Old 09-01-2014, 05:09 PM   #3
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I'm using water for now becuase of the overheating I keep Having to flush and bleed and stuff
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Old 09-02-2014, 08:45 AM   #4
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Are you losing the water then?

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Old 09-02-2014, 10:09 AM   #5
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Is there any fluid directly underneath the vehicle; water directly under the vehilce indicates your water pump is dying. I just changed mine this weekend because the water pump began leaking and leaving puddles under the car. Just my two and a half cents worth...
V/R Zachary Pullins Sr.
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2006 E90 325Xi & 2000 E46 3XXi
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