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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 09-24-2012, 12:41 PM   #581
Stinger9
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sensor at the bottom of the ET is a coolant level sensor.
Could have damaged it. It is fragile.

From all you say, your coolant level is OK. The float stick is accurate.
Sounds like your level sensor is still not OK, or is installed badly.

Coolant proportion is irrelevant.
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Old 09-24-2012, 01:22 PM   #582
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Quote:
Originally Posted by Raymond42262 View Post
...
But why would a sensor that measures temperature that mounts outside the tank have anything to do with the fluid level inside the tank ? I could understand if there was a problem with the flotation stick.

But how does a temp sensor relate to water level inside the tank ?
It's not a thermistor, it's a magnetic reed switch. It reacts to a magnet in the float.
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Old 09-24-2012, 05:54 PM   #583
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Originally Posted by Stinger9 View Post
sensor at the bottom of the ET is a coolant level sensor.
Could have damaged it. It is fragile
.

From all you say, your coolant level is OK. The float stick is accurate.
Sounds like your level sensor is still not OK, or is installed badly.

Coolant proportion is irrelevant.
Thanks !

Quote:
Originally Posted by joegr View Post
It's not a thermistor, it's a magnetic reed switch. It reacts to a magnet in the float.
Thanks ! I bet others learned from this as well.

I'll order a new sensor.
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Old 09-24-2012, 08:06 PM   #584
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Quick question i will do my coolant system this week and i ordered online a coolant temperature sensor! But it came in the box 2 of then! Do we use two or was a mistake of the owner! And were are located then? Both are equal!
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Old 09-24-2012, 08:22 PM   #585
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^ I'm fairly certain those are for an E36. Where did you order from?
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Old 09-24-2012, 09:37 PM   #586
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Quick question i will do my coolant system this week and i ordered online a coolant temperature sensor! But it came in the box 2 of then! Do we use two or was a mistake of the owner! And were are located then? Both are equal!
Reason to be confused!
These are not the temperature sensors that go into the lower radiator hose, which I assume which is what you want?

I believe there are one or two sensors like this up top of the engine. One sits in the oil filter housing and is called an oil/engine/water sensor or something like that. Another sits near the back of the engine into the manifold. Might be called an air temperature sensor?
The above from memory, but would require some research on www.realoem.com.
But these are not your lower hose sensor. Need to straighten this out with your vendor.

See part #13 http://www.realoem.com/bmw/showparts...01&hg=11&fg=30
.
.
And part #3 here: http://www.realoem.com/bmw/showparts...79&hg=11&fg=40

Last edited by Stinger9; 09-24-2012 at 10:00 PM.
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Old 09-25-2012, 05:21 AM   #587
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Thanks but I was not looking for the fan sensor (one in bottom hose) my car work at 93 most the time never go over 94 degree C, but my gauge is passing 1/2 in cluster. I search the webs that you post and the air temperature sensor doesn't look nothing like those! Just the one on the oil filter case! The person that i buy it from send me 2 instead of one! But thanks its help me a lot! I will change my ET, both hoses, wahler thermostat, graf wp, belt, tensioner, and this sensor to see if my gauge start working normal! Radiator was change 4 months ago!
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Old 09-25-2012, 10:16 AM   #588
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Excellent plan!

Let us know how the gauge fix works?
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Old 09-25-2012, 10:50 AM   #589
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I will I just hope it works good when i change all of that!

Last edited by bimer21; 09-25-2012 at 10:51 AM.
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Old 09-28-2012, 11:09 AM   #590
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Doing the work now! I got aftermarket hoses a behr thermostat brand and wp dont say nothing! But they look new less that 30k milles! But putting now everything new OEM also! Let see how it ends
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Old 09-28-2012, 11:12 AM   #591
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Also new belts
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Old 09-28-2012, 12:48 PM   #592
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Check out all three pulleys while you have it all apart now.
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Old 09-28-2012, 01:17 PM   #593
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Alright guys here is all new:
2 hoses, ET, WP, Thermostat, oil/water temp sensor(located at oil filter housing), 2 pulleys, belt, BMW coolant, fan switch sensor(located at bottom hose) and my temp gauge still over 1/2! Whats next? Also i have no leaks at all! Before works at 93-95C now 96-97C

Last edited by bimer21; 09-28-2012 at 02:06 PM.
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Old 09-29-2012, 03:26 AM   #594
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I drove home last night at around 11PM. Suddenly the temp gauge swung to the red zone. Coasting to stop. Some coolant leaked to the ground. It was only a few kms to home, so I let it cool down a little and limped home. At the mean time, switched on the digital temp gauge. The temp rose very quickly. On average I can only drive a few hundred meters before it reached 120 degree. I hope the head is not damaged.

There're actually not much leak, and all components are still sealed. I suspect the high temperature caused excessive pressure and blown open the radiator cap. Turned out the water pump was the culprit. It was a Bosch pump I bought only 5 months ago. Big mistake! Look at this picture. The whole impeller was shattered. Stay away from this crap.
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Old 09-29-2012, 08:40 AM   #595
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Dam! Just buy a new water pump and start driving again
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Old 09-30-2012, 06:40 AM   #596
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My local reseller saved my day. He personally delivered a new pump within 2 hours after I took out the old pump. Car was happy going now.
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Old 10-04-2012, 12:46 PM   #597
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Great info thank you
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Old 10-05-2012, 10:08 AM   #598
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Mango I sent you a pm but I will post it here for all. If some of the brand names are different is that ok? I am ordering from BMA-Parts and some of the names have changes. Not sure if you picked these brands for quality?

Thanks,
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Old 10-05-2012, 10:12 AM   #599
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Old 10-05-2012, 10:21 AM   #600
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Mango i change my coolant system complete as post before but my temp gauge still passing 1/2 and temp is 96, what should i do next?
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