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      06-24-2010, 06:40 PM   #1
Dackelone
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Drives: 135i Silber mit/Rot 6MT N54
Join Date: Feb 2010
Location: Bayern, Germany

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Checking & adding engine coolant DIY

Hi Guys,

I thought I would create this simply DIY thread for checking and adding engine coolant. Somehow BMW has over engineer'd the expansion tank and level float. It is NOT as simple as one would think. I really don't know why they just did not make the expansion tank out of some opec plastic instead of non-see-thru black stuff!

First off.... ALWAYS check your coolant with a COLD ENGINE!!! NOT HOT!!!

Ok... here is my little thread...

The black coolant expansion tank is located on the front passenger side of the car.





as usual... the woners manual has been somewhat lacking - I think. Refering you to the coolant expansion tank directions.


Here is a close up photo of the expnsion tank directions...


The coolant expansion tank...


lefty loosey....


There is a red float showing you the coolant level...




use your finger to push the float level down and watch it "bob" back up to measure the coolant level in the tank...




when the engine is COLD it should be LEVEL with the lip of the exp tank. Mine was slightly low. I choose NOT to add any fluid.


IF you have to add any coolant... USE ONLY BMW approved coolant!!!
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