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E90/E91/E92/E93 (2006 - 2013)
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  #1  
Old 09-16-2013, 05:05 AM
stanjr stanjr is offline
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2006 323i overheating/losing coolant

I have a 2006 323i, the engine is overheating and keeps losing coolant, I don't see any stains under the car, and I have to keep refilling coolant, last night it overheated again but coolant level was good. Where can I be losing coolant to. Is it water pump, thermostat or head gasket.
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  #2  
Old 09-16-2013, 06:11 AM
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CALWATERBOY CALWATERBOY is offline
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Quote:
Originally Posted by stanjr View Post
I have a 2006 323i, the engine is overheating and keeps losing coolant, I don't see any stains under the car, and I have to keep refilling coolant, last night it overheated again but coolant level was good. Where can I be losing coolant to. Is it water pump, thermostat or head gasket.
Yes.

Which, is that what you're asking? How would we know from here? Time to take it in.
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Old 09-16-2013, 06:16 AM
stanjr stanjr is offline
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have been losing coolant for a couple months now

The coolant level has been low for about two months now, have to top it up here and there, read that it was normal for this car to be using coolant more than usual, but where can it be going. Looks oily around the middle part of the engine.
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Old 09-16-2013, 09:46 AM
jburke4689 jburke4689 is offline
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If it isn't leaking, it is almost certainly the headgasket. Overheating is another clue. The coolant is either going into the oil in which case you would have a light brown creamy goo coating on the bottom of the filler cap when you open it or out the exhaust. In that case you should smell it at the exhaust or see some white smoke out the tail pipe.
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Old 09-16-2013, 12:12 PM
stanjr stanjr is offline
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head gasket

Now that I am pretty sure it's probably the head gasket because, it burn a lot of oil too.
Is it a big process to change the head gasket or is there somewhere I can get instructions to do this job Pretty handy with the tools.
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Old 09-16-2013, 12:24 PM
jburke4689 jburke4689 is offline
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This is a hard job with expensive consequences for making mistakes. Pretty handy is pretty abiguous. You may be better off getting a lower mileage replacement engine.
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Old 09-16-2013, 05:49 PM
aleks001 aleks001 is offline
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It's your water pump 99%. It spills coolant out the top of the cap, but dries up pretty quickly. As soon as you over heat pull over and open you bonnet.
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Old 09-16-2013, 06:45 PM
jburke4689 jburke4689 is offline
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Listen to Aleks001. His approach is definitely cheaper.
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Old 09-16-2013, 07:28 PM
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CALWATERBOY CALWATERBOY is offline
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Quote:
Originally Posted by stanjr View Post
Now that I am pretty sure it's probably the head gasket because, it burn a lot of oil too.
Is it a big process to change the head gasket or is there somewhere I can get instructions to do this job Pretty handy with the tools.

Burning oil, as in smoky exhaust + oil consumption? You've major issues!

HERE

HERE

Check valve guides & piston rings. Lots of DIY writeups at E90POST Have you heard of Google.com?

There. If you're not kept busy through the Winter with the above, you're doing something wrong!

.

Last edited by CALWATERBOY; 09-16-2013 at 07:29 PM.
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  #10  
Old 10-04-2013, 10:29 PM
mserver mserver is offline
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Im having the same issue with losing coolant. I just had the water pump replaced. I do not burn oil and there is no smoke when I start the car. It also runs fine as far as I can tell. I really have no clue what is going on. Any suggestions? I should have started with the fact that it is a 2007 328xi.

Last edited by mserver; 10-04-2013 at 10:38 PM.
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Old 10-06-2013, 12:18 AM
aleks001 aleks001 is offline
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Originally Posted by mserver View Post
Im having the same issue with losing coolant. I just had the water pump replaced. I do not burn oil and there is no smoke when I start the car. It also runs fine as far as I can tell. I really have no clue what is going on. Any suggestions? I should have started with the fact that it is a 2007 328xi.
1. Get car read for codes.

2. If the car is overheating, I would get the waterpump checked again.

3. If you are genuinelly loosing coolant and can't see a leak and you are not overheating. You're headgasket is probably the only culprit. Open your oil cap and if there is any milky whitish resisdue, you're in for a massive headgasket job.
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Old 10-06-2013, 10:09 AM
fdriller9 fdriller9 is offline
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Quote:
Originally Posted by stanjr View Post
The coolant level has been low for about two months now, have to top it up here and there, read that it was normal for this car to be using coolant more than usual, but where can it be going. Looks oily around the middle part of the engine.
It's normal for BMWs to lose engine oil but NEVER coolant. In all my BMWs I have owned, I have never lost coolant. The only time the overflow tank is empty (or low) is when I purposely flush the system and refill with new coolant/distilled water.

If you don't see any leaks near the coolant hoses, you might have a bad gasket. Oil filter housing and head gasket to name a few.
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