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Old 01-12-2015, 12:39 AM   #1
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98 e36 no heat and engine not at operating temps

my 98 328i doesnt get to operating temperature. doesn't matter how long i drive or even if i just let it idle. also i have zero heat. the control shows 32 but it blows freezing cold air. anybody have any suggestions on what to look for?

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Old 01-12-2015, 01:00 AM   #2
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Old 01-12-2015, 01:06 AM   #3
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would i not still get some sort of heat out of the vents after driving for an hour tho? or would a simple thermostat solve both those issues?
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Old 01-12-2015, 01:36 AM   #4
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As bokan suggested, probably your thermostat is stuck open.

If it's brutally cold outside as it was here in the GTA for the past while, you won't feel any sort of heat with an open thermostat. I would replace it.

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Old 01-12-2015, 02:44 PM   #5
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I just bought an E36 and it wasn't blowing hot air. The engine would get to normal temps though.

I topped up the coolant and let it boil, fixed my issue with the heat. I figure the heater core had air in it.

For the price of a jug of coolant you might want to try that.

As I mentioned though my engine temp was always in the middle, and what your experiencing is most likely a stuck thermostat.
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Old 01-12-2015, 09:24 PM   #6
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Old 01-17-2015, 08:51 AM   #7
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could be the thermostat, but like the poster above, it could be air in the system.
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Old 02-02-2015, 11:58 PM   #8
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ive had air in the cooling system cause similar symptoms it can be a pain in the ass to bleed sometimes.... everytime ive done it lol
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Old 02-19-2015, 09:51 AM   #9
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Thermostat stuck open all day. No good because it keeps the car in open loop warm up mode uses more gas potentially fouling catalytic converters sooner, and causing more cylinder wear because of the operating temp

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