Help!help! [Archive] - Bimmerfest - BMW Forums

: Help!help!

03-09-2011, 06:09 PM
recently my bmw overheated on me while waiting at the light and today there is a radiator fluid coming from the bottom of the car and i have no idea why or where its coming from. Im new to bmw and have no clue where to start.

the check engine light always comes on and off..

03-10-2011, 06:36 PM
Leaks are pretty easy to diagnose. Fill the car up with fluid, start it, wait for it to warm up and watch for the leak. Use a flashlight to find the leak. You might need to remove the undertray to find the leak if it's one of the lower hoses.

If you are lucky it will just be the rad cap that has gone bad. The radiator expansion tank is one of the most common places for leaks to occur. Next are the hoses then water pump and thermostat.