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3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

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Old 04-19-2005, 05:46 PM   #1 (permalink)
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My temp gauge needle wont go above 1/4 and sometime jumps slightly around, is this a common problem? Any way to remedy this, also is this why my heat sucks?

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Old 04-19-2005, 08:17 PM   #2 (permalink)
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could be a bad ground behind your dash. That would possily make the gauge not read properly.

But if your heat does not work then most likely your thermostat is stuck open and your engine is not heating up. Do you get poor fuel economy or does your car run poorly?
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Old 04-19-2005, 09:53 PM   #3 (permalink)
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Originally posted by RealBMW 02@Apr 19 2005, 08:17 PM
could be a bad ground behind your dash. That would possily make the gauge not read properly.

But if your heat does not work then most likely your thermostat is stuck open and your engine is not heating up. Do you get poor fuel economy or does your car run poorly?
[snapback]335080[/snapback]

well its not the greatest, but it does have 222,000 miles so I guess I cant complain. haha.

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Old 04-19-2005, 10:02 PM   #4 (permalink)
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I would replace the thermstat. There is a very good chance it is broken or stuck open.
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Old 04-19-2005, 10:55 PM   #5 (permalink)
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i had this problem. Check your water pump to make sure its still good. Mine was starting to go out so the thermostat would always be open and my temp would never reach normal temp. Finally the pump went out, I replaced it and it works perfectly now, just a little under normal running temperature
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Old 04-19-2005, 11:34 PM   #6 (permalink)
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Quote:
Originally posted by Numark318i@Apr 19 2005, 08:55 PM
i had this problem. Check your water pump to make sure its still good. Mine was starting to go out so the thermostat would always be open and my temp would never reach normal temp. Finally the pump went out, I replaced it and it works perfectly now, just a little under normal running temperature
[snapback]335191[/snapback]
check your coolent level, thermostat either stuck open or closed, at 1/4 opp temp the heat should work because thats as hot as mine gets and iv got scorching heat. also check belts, and water pump. and verry unlikley but your heater core could be clogged.
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Old 04-20-2005, 12:58 PM   #7 (permalink)
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Originally posted by Kowalski+Apr 19 2005, 11:34 PM--><div class='quotetop'>QUOTE(Kowalski @ Apr 19 2005, 11:34 PM)</div><div class='quotemain'><!--QuoteBegin-Numark318i@Apr 19 2005, 08:55 PM
i had this problem. Check your water pump to make sure its still good. Mine was starting to go out so the thermostat would always be open and my temp would never reach normal temp. Finally the pump went out, I replaced it and it works perfectly now, just a little under normal running temperature
[snapback]335191[/snapback]
check your coolent level, thermostat either stuck open or closed, at 1/4 opp temp the heat should work because thats as hot as mine gets and iv got scorching heat. also check belts, and water pump. and verry unlikley but your heater core could be clogged.
[snapback]335219[/snapback]
[/b][/quote]


Ok cool Ill replace the T-stat and see if that fixes it. Any chance its the coolant temp sensor or are they pretty reliable?

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Old 04-20-2005, 03:03 PM   #8 (permalink)
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It should be your T-stat. I had the same problem. I bought my car from down south and it was equipped with a T-stat that made the engine run cooler. I replaced it and now it works fine.
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Old 04-20-2005, 03:36 PM   #9 (permalink)
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I would start just by checking the connection on the sending unit for temp gauge, they tend to get corroded (spellcheck..) and not function properly, check coolant level of course, and go from there... Good luck
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