N55 coolant colour

IOSKARI · 05-02-2021, 04:47 PM

Hello everyone !
Today I have checked my coolant on n55.
Take a white paper and I saw that it’s a little bit brown.

I think that it should be brown at any way.

What should I check ? And where could be the problem

n55david · 05-02-2021, 06:52 PM

Quote:

Originally Posted by OSKAR1

Hello everyone !
Today I have checked my coolant on n55.
Take a white paper and I saw that it’s a little bit brown.

I think that it should be brown at any way.

What should I check ? And where could be the problem

did you mix it with something you shouldn't have?

is there oil in it?

Orion4 · 05-02-2021, 08:15 PM

Unless you have added non-BMW antifreeze, that brown color may well indicated oil in the coolant! Definitely Not Good. I would get that checked ASAP!

frchdragon · 05-02-2021, 08:39 PM

BMW coolant is blue. Even aftermarket BMW coolant is blue.
If you had oil in the coolant, you would see see it on the coolant cap and in the coolant reservoir as oil rises to the top.

Brown coolant suggests that is hasn't been flushed in a long time or that it was in contact with rust.

Orion4 · 05-03-2021, 07:14 PM

Has your system been flushed? Mine is the same MY (2013) with 2 fllushes over its life so far with any indication of rust occurring. Fluid is a Blue as new.

05-02-2021, 04:47 PM	#1
IOSKARI New Member 0 Rep 5 Posts Drives: '15 335xi Join Date: Feb 2021 Location: Poland iTrader: (0)	N55 coolant colour Hello everyone ! Today I have checked my coolant on n55. Take a white paper and I saw that it’s a little bit brown. I think that it should be brown at any way. What should I check ? And where could be the problem
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05-02-2021, 08:15 PM	#3
Orion4 Lieutenant Colonel 478 Rep 1,566 Posts Drives: 2013 335i Sport Line Sedan Join Date: Aug 2009 Location: Melbourne, FL iTrader: (0)	Unless you have added non-BMW antifreeze, that brown color may well indicated oil in the coolant! Definitely Not Good. I would get that checked ASAP!
	Appreciate 1 n55david1291.00 Quote

05-02-2021, 08:39 PM	#4
frchdragon Lieutenant 338 Rep 416 Posts Drives: 2016 BMW M4 Join Date: Feb 2021 Location: ON, Canada iTrader: (0)	BMW coolant is blue. Even aftermarket BMW coolant is blue. If you had oil in the coolant, you would see see it on the coolant cap and in the coolant reservoir as oil rises to the top. Brown coolant suggests that is hasn't been flushed in a long time or that it was in contact with rust. __________________ '16 M4 bone stock '13 335ix Msport BM3 stage1 - MAD FMI - FTP CP - Bilstein B4 (SOLD) '85 635csi M30 turbo race car (SOLD)
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05-03-2021, 07:14 PM	#5
Orion4 Lieutenant Colonel 478 Rep 1,566 Posts Drives: 2013 335i Sport Line Sedan Join Date: Aug 2009 Location: Melbourne, FL iTrader: (0)	Has your system been flushed? Mine is the same MY (2013) with 2 fllushes over its life so far with any indication of rust occurring. Fluid is a Blue as new.
	Appreciate 0 Quote

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