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E90/E91/E92/E93 (2006 - 2013)
The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

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  #1  
Old 02-24-2014, 02:38 PM
sierrasmith71 sierrasmith71 is offline
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Location: MAryland
 
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Mein Auto: 2011 335i X
Non OEM coolant expansion tank?

Yesterday I purchased a 2011 335i x drive. Clean and has new brakes and new tires.
On the drive home , (10 miles) I heard a "chime" and searched the unfamiliar dash to discover what need my attention.. I spied a yellow symbol that looked like a tank with water waves in it ? than it went out.. engine temp looked good --but who knew what the number meant? 240 F ( or so, I was trying to dive and decipher an unfamiliar dash) .. seemed too high for coolant , but ut was less than half scale , so I believe whatever it was would be OK..

While I was finishing my drive home I noticed a red triangle with an "!" in it ?? OK

Got home, turned the engine off and the yellow "tank" symbol appeared again. Time to read the owners manual..0n hour later . I discover that that I was being informed that the coolant was low and it need attention.. I noted the warnings not to open the filler until the engine was cool..

In the morning I opened it and found that the expansion tank is not as described in the manual. It does not have the floating red "bobber" but rather an internal white level gauge marked MIN and Max. An embossed diagram of a side view of this device was printed on the top of the tank with the word "KALT" highlighted..

Is this a non BMW tank that was added in a repair?

I searched and found no evidence a leak anywhere, and further searching on BMW forums seems to indicate that moderate coolant loss is not unusual ??

Thanks for allowing this long post, but I spent a bad night thinking "what have I bought?"


David Garrison

Last edited by sierrasmith71; 03-01-2014 at 06:18 AM.
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  #2  
Old 02-24-2014, 02:40 PM
fdriller9 fdriller9 is online now
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My level is white. I know it's OEM. I've owned the car new, since 2006.

Post a picture.
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  #3  
Old 02-24-2014, 03:31 PM
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Zeichen311 Zeichen311 is offline
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The owner's manual is rarely (if ever) updated to reflect running production changes for design fixes, parts changes and so on. Kalt is German for "cold," meaning, check the coolant level when cold.

Sleep well.

Oh, incidentally, the temperature gauge reports oil temperature, not coolant temperature (note the oil can symbol on the gauge). This is a much better indicator of true engine temperature than the coolant and 240F is about normal.
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Last edited by Zeichen311; 02-24-2014 at 03:35 PM.
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  #4  
Old 02-24-2014, 03:33 PM
sierrasmith71 sierrasmith71 is offline
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Mein Auto: 2011 335i X
Coolant expansion tank 2011 335i Xdrive

here are some pics

David G.
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  #5  
Old 02-24-2014, 03:41 PM
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Zeichen311 Zeichen311 is offline
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That's an OE BMW tank.
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2011 335xi Individual 6MT - Azurite Black Metallic / Oyster & Black / Anthracite Maple + all the good stuff
 
N47 35' 30.13" E11 10' 33.36" - End of break-in period. You can guess the rest. BMW CCA
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Old 02-24-2014, 10:40 PM
sptt144 sptt144 is offline
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Wouldn't hurt to pay for a check up at the dealer or an INDY. Sounds like all is ok now though. These cars will throw up some warning lights every now and then but a restart usually clears everything up as sometimes you can drive the car too hard and it will protect itself and scream at you. Happened to me when I first got mine and was pushing its limits. Since then...nada.
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  #7  
Old 02-25-2014, 07:02 AM
BostonB6 BostonB6 is offline
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Keep an eye on the coolant level. It's probably nothing but coolant loss is one sign of a possible headgasket issue.
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Old 02-25-2014, 07:07 AM
fdriller9 fdriller9 is online now
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That's an oem tank. I've never seen one without the little bobber in there though
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Old 02-25-2014, 11:22 AM
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Zeichen311 Zeichen311 is offline
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Quote:
Originally Posted by fdriller9 View Post
That's an oem tank. I've never seen one without the little bobber in there though
Mine is the same; perhaps it's a change that came along with the N55 engine.
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2011 335xi Individual 6MT - Azurite Black Metallic / Oyster & Black / Anthracite Maple + all the good stuff
 
N47 35' 30.13" E11 10' 33.36" - End of break-in period. You can guess the rest. BMW CCA
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Old 02-25-2014, 03:35 PM
hondo402000 hondo402000 is offline
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does the OP have to purge the system of air?
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