E46Fanatics - View Single Post - E46 COOLING SYSTEM GUIDE - overheating/coolant/etc
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Old 12-24-2012, 11:08 AM   #757
Sienna Red Coupe
DiscoStu's Avatar
Join Date: Apr 2003
Location: Northern Virginia
Posts: 6,703
My Ride: Project 330xi
Originally Posted by ferhatkochan View Post
So on my dashboard my coolant sign sometimes comes on and off its weird so I checked my coolant level this morning when the car was OFF and there's no liquid in there whatsoever ... Which is really bad?

Am I supposed to check it when the car is on?
I may have a leak?

What should I do
Top it off with some coolant, or as stated below, a small amount of distilled water. Check your hoses, expansion tank, and radiator for any signs of leaks.

Always check the coolant when the car is cold. There is significant pressure on the expansion tank when it's hot, I would not advise to open the cap until the car is cold.
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