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3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

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Old 11-12-2009, 03:36 AM   #1 (permalink)
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1994 325 overheating problem

hi, iv had this problem for a few weeks now, it starts to get very hot like close to the red, but the heaters are blowing cold air?

so i bleed the system just how it says in the bentley manual book then its ok for a week or so.

this morning i drove the car for about 6 miles, the temp went up to half way but it took ages for the blowers to get hot????
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Old 11-12-2009, 03:43 AM   #2 (permalink)
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Could be your thermostat, when its getting to temp check the top and bottom hoses on the radiator if the top one is hot and the bottom one is luke warm/cold its your thermostat.
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Old 11-12-2009, 05:17 AM   #3 (permalink)
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top one is very hot, bottom is stone cold
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Old 11-12-2009, 05:20 AM   #4 (permalink)
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That will be the thermostat then, new one required....

here's how to:

BMW E36 Thermostat Removal And Coolant Flush

you dont have to do the flush if you dont want to but its a good idea.
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Last edited by marti5; 11-12-2009 at 05:23 AM.
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Old 11-12-2009, 05:33 AM   #5 (permalink)
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Originally Posted by marti5 View Post
That will be the thermostat then, new one required....

here's how to:

BMW E36 Thermostat Removal And Coolant Flush

you dont have to do the flush if you dont want to but its a good idea.

thanks mate, looks like im getting my hands dirty at the weekend
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Old 11-14-2009, 10:09 AM   #6 (permalink)
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you may be getting them a lot dirtier.. sounds like a head gasket leak to me. Try running w/o the thermostat in to check.
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Old 11-14-2009, 03:31 PM   #7 (permalink)
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i havent done anything to it yet, and its been fine for 3 days now?
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Old 11-15-2009, 07:26 AM   #8 (permalink)
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sticky thermostat change it before it sticks closed while your on the highway
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