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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 02-11-2010, 11:28 PM   #1 (permalink)
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Under Heating?????

So I been driving my 2000 328ci for the last couple days and today it didn't heat up. I was driving home from Wal-Mart and I noticed the heat was really kicking in and I checked the temp gauge and it was cold. What could this be? Thermostat stuck?? The car was sitting for 8 months when I bought it Tuesday and that was the first time it had been driven in 8 months. I parked it in the garage but my lights are out and I can;t check the fluid level right now. I was just wondering if anyone else has had a similar problem
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Old 02-11-2010, 11:36 PM   #2 (permalink)
OMFG another one!?
 
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That does seem like a thermostat issue.
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Old 02-11-2010, 11:40 PM   #3 (permalink)
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Now this is my first BMW is it about as easy to change in a Bimmer as any other car?
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Old 02-11-2010, 11:58 PM   #4 (permalink)
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Most likely pretty much; but be careful and informed about the coolant bleed (of air) and refill procedure.
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Old 02-12-2010, 03:11 AM   #5 (permalink)
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If its been stood for 8 months, I would do a full coolant change while your doing the stat and definitely an oil and filter change...
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Old 02-12-2010, 04:25 PM   #6 (permalink)
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Yes, it is a very straight-forward job. I just changed the thermostat on my car a couple of weeks ago. Is your car an automatic or a manual? On the automatic, you probably will have to remove the engine-driven radiator cooling fan to get undisturbed access to the thermostat. You will have to pull out the electrical fan on regardless of transmission.

The thermostat is electrically heated, so it will have a harness you need to disconnect and reconnect once done. By the way, the sucker is expensive: around $65, but the thermostat an a new housing come together as one part.

Oh,, you will also have ot remove the plastic splash guard from under teh engine bay for the coolant to drip out.

I am sorry all tehse pointers are so scattered. RUn an online search for E46 thermostat DIY and you will find step-by-step instructions. I don't think we have a DIY on our forum yet.

Good luck!
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Old 02-13-2010, 01:57 AM   #7 (permalink)
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Quote:
Originally Posted by totalchaos View Post
So I been driving my 2000 328ci for the last couple days and today it didn't heat up. I was driving home from Wal-Mart and I noticed the heat was really kicking in and I checked the temp gauge and it was cold. What could this be? Thermostat stuck?? The car was sitting for 8 months when I bought it Tuesday and that was the first time it had been driven in 8 months. I parked it in the garage but my lights are out and I can;t check the fluid level right now. I was just wondering if anyone else has had a similar problem
if you mean you have a running engine and have cabin heat, but temperature guage needle is leftward as in COLD.... i would say a loose wire in the temp guage circuit; or defective temp guage(not likely, though)

check also temp guage sensor for integrity & connection... it's under the exhaust manifold.
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Old 02-13-2010, 09:33 AM   #8 (permalink)
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^^ Try what darkhorse said before you go on to change the thermostat.
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Old 03-06-2010, 07:20 AM   #9 (permalink)
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Had the same problem and it was the theromastat, if you have a 325i 2002 model you have to buy a 32 mm long wrench and a 47.00 special wrench to get the fan off so you can get to the thermostat housing, very easy to do ( the tool is a counter holder fan removal tool at Pelican Parts it is 47.00 after shipping) you will need it for other parts replacing later on like the waterpump and belts so good investment trust me. O ya you have to take the fan shroud off witch is easy to do.
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