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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing / Warranty > Low Coolant Warning



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      09-30-2011, 03:17 PM   #1
laozfella
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Low Coolant Warning

Never add on Coolant before.

I went to the BMW dealer to buy the bmw coolant. The bottle doesn't say 50/50 etc so I assume I have to add water?. I live in New England, it gets pretty cold during the winter so do I need to mix 60%/40% water? or is 50/50 good enough. Anyone living in this area can shed some light?

Also what are you guys using to measure these percentages?

is there anything special for me to do when adding coolant to the reservoir? I was thinking of just adding the mixture until it gets to the proper level, i was told I may need to bleed? do I?

Sorry I am a newb with cars but I need to learn how to do these things myself. Been lazy and never cared in the past to start working with cars.

thanks.
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      09-30-2011, 06:04 PM   #2
JunkStory
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Make sure you add distilled water, not tap water.

50/50 or 60/40 should be fine. Yes just add it to the coolant reservoir until the floating thing starts hovering near the top as indicated on the direction (on the reservoir plastic). You don't need to bleed, unless you are doing a coolant change.

Actually, if your car is 2007 and have not done one coolant change, now might be a good time to do it.
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      09-30-2011, 07:16 PM   #3
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good advice above... distilled water is the way to go, it doesn't have elements in it that will aid in corroding your radiator or block.

just in case...obviously be careful opening the coolant while hot or under pressure. don't add cold coolant to a hot engine (may harm block).
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      10-01-2011, 02:09 AM   #4
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Also, add the coolant carefully- don't let it drop on other parts. If it does, wipe it clean right away. Certain metallic parts may corrode if coolant is left on them. A funnel from the dollar store works great. Lastly, you may want to check back the coolant level after 1-2 weeks of driving.
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      10-01-2011, 01:48 PM   #5
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ENINTY's DIY:

http://www.e90post.com/forums/showthread.php?t=248187

Yes, 50/50 pre mix with distilled water before adding.

Last edited by Glim; 10-05-2011 at 12:11 AM.
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      10-03-2011, 09:14 AM   #6
laozfella
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Thanks guys. All your suggestions help much. I did all the above (distilled water, mix etc)

It was easy and painless. My coolant was super low, to the point where the meter thing was not even visible and was inside the reservoir. I wasn't sure how to use that meter thing, only to realize that meter thing floats to the top of the reservoir when coolant is added. I have the meter floating over the reservoir at the second bubble of the meter which is now at the proper/max level.

No more coolant low warning and will check it in 2 weeks to see if there are any leaks. Thanks guys!
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      10-03-2011, 10:31 PM   #7
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Congratulations. A small amount added after 1-2 weeks is normal and does not indicate leak. Hopefully, your coolant wasn't too low to warrant bleeding procedure. Otherwise, ENINTY's great DIY post contains instructions on how to bleed. Good thing, you took care of the low coolant. Water and oil are the life blood of the engine.
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