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Old 05-20-2014, 05:13 PM   #1
thiagooo
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Temperature shooting up and down need help!! 03 325Ci

Hi I just bought a 03 325Ci and now the temperature keeps shooting up to red then as soon as it reaches the red it goes back to the middle and it keeps doing that, it goes to red too quickly before to motor can actually even heat up, has this happened to anybody else? If so what was it?
I did a little research and mostly it said that problem is a bad thermostat and some said sensor...but mostly thermostat....

If any kind soul out there can help me please do lol



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Old 05-20-2014, 06:31 PM   #2
Yewzer B Lewzer
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You may have trapped air in the system, or worse a blown head gasket.

Look for Mango's sticky thread on cooling systems and follow the bleeding procedure for starters.

If it's a blown head gasket I would making a visit to the previous owner.


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Old 05-20-2014, 06:39 PM   #3
thiagooo
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Alright thank you brother


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Old 05-20-2014, 07:57 PM   #4
greenskycity
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Had a weird issue like that the other day. On a country drive I noticed that my temp was in the red but the light wasnt on. My tach was at like a 1200 rpm at idle and my speedo said I was doing 20 mph while stopped. I'd ripped off my ambient air probe again and thought that might have been it.
I turned the car off abd the needles stayed where they were. I shorted the temp probe wires together and pulled the battery negative cable, after reattaching it, all was normal again except my outside temp read 121*.

I'd say pull the battery first, maybe change the temperature sensor and then bleed the system. If it's moving to red on cold starts and back, might be something easy.

Good luck,
Green.

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Old 05-20-2014, 08:45 PM   #5
lszlszx
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Find out the history of the car. Did the PO work on it?
Did he tell you about the problem? Is there a lemon law in your state?
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Old 05-21-2014, 09:29 AM   #6
teamdfl
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Those are typical symptoms of air in the cooling system.
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Old 05-21-2014, 10:27 AM   #7
orb
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Quote:
Originally Posted by lszlszx View Post
Find out the history of the car. Did the PO work on it?
Did he tell you about the problem? Is there a lemon law in your state?
Doesn't the lemon law only apply to new cars?
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Old 05-21-2014, 11:59 AM   #8
hummer
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Sounds like a bad temperature sensor or loose wire connected to it?
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