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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 07-21-2016, 01:34 AM   #1
e46proph
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im overheating!!!

so i picked up a 99 323i e46 manual trans and it has s few minor issues... had to replace smog pump compression hose, had a hole in my air box so i installed a short ram air intake, oil hadn't been changed in years... had GM coolant in it so i flushed it out and put bmw coolant in it and changed the oil and it seemed to rein like a completely different car from the day i got it... bout a week into me driving it on the way to work i noticed she was steaming and then my t stat shot all the way up over heating then it died... popped the hood and i noticed i was shooting a lot of steam out of my top radiator hose where it connects to the expansion tank... i immediately replaced it with a new one filled it back up with coolant but she's still overheating prior to this happening i had no issues with the temp... and its not jus running hot... the temp light comes on after the car running after 5 mins of driving no matter how i place the rpms... help!!!
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Old 07-21-2016, 01:58 AM   #2
Mflara20
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You have air in your system.
Google the procedure of how to bleed it l.

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Old 07-21-2016, 09:37 AM   #3
EthirD
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Forum user Mango has made a helpful instructional video just for you:
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Last edited by EthirD; 07-21-2016 at 09:38 AM.
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Old 07-21-2016, 09:55 AM   #4
joegr
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Quote:
Originally Posted by e46proph View Post
... i noticed she was steaming and then my t stat shot all the way up over heating then it died... .... the temp light comes on after the car running after 5 mins of driving no matter how i place the rpms... help!!!
I assume that you mean the temperature gauge. (The thermostat and the temperature gauge are two very different things.)

I suspect that you may have killed it (warped head/warped block/failed head gasket) when you continued to drive it while it was overheating until the engine stalled. Running it now all the way up the gauge till it hits the red is also a very bad idea. You should always stop before it gets that far.
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Old 07-21-2016, 03:25 PM   #5
e46proph
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thx so i just bled the air out the system. but of course another problem popped up. almost immediately after i started it back up i started getting smoke coming from what looks like my O2 sensor above the headers... i have already purchased a valve cover gasket because i knew needed one could this be the problem?
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Old 07-21-2016, 03:31 PM   #6
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Originally Posted by e46proph View Post
thx so i just bled the air out the system. but of course another problem popped up. almost immediately after i started it back up i started getting smoke coming from what looks like my O2 sensor above the headers... i have already purchased a valve cover gasket because i knew needed one could this be the problem?
you probably cracked or warped the head.

sorry.
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Old 07-21-2016, 03:33 PM   #7
e46proph
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if thats the case what do you suggest?
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Old 07-21-2016, 04:13 PM   #8
joegr
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if thats the case what do you suggest?
Replace engine.
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