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expansion tank failure

  1. E46 (1999 - 2006)
    2002 325i automatic. Just flushed the coolant for some work, and replaced the expansion tank along the way. Everything went swimmingly until I had to add coolant again. I added it as per instructions online, and everytime i crank the vehicle and run it, the 'low coolant' indicator comes on...
  2. E85 / E86 Z4 (2003-2008)
    Hello, I am going to replace a leaking expansion tank on my 2003 Z4 with 2.5 automatic. I have read many of the posts, but going in cold -- what parts should I have on hand to do it right the first time. Which O rings, ( Part numbers?) which other parts? Hoses? sensors? what is the best step...
  3. E39 (1997 - 2003)
    I posted this same info over on Roadfly, unless you have an account there you can't view the pics. 540 Expansion tank problem and dissection A few weeks ago I helped a friend change his lower oil pan gasket on his 2000 540ia. He mentioned that when driving on the highway and then needing to...
  4. E60 / E61 (2004 - 2010)
    I received a "coolant level low" check control signal on my 2005 BMW 545i and after topping off the coolant with 50/50 mix a couple times and eventually receiving the "coolant level low" signal again, I figured there was a leak in the expansion tank and/or the hoses. A couple days before my...
  5. E46 (1999 - 2006)
    I will share my coolant tank failure and fix for my 2003 330 Ci Convertible. The coolant tank failed catastrophically (exploded). I replaced the tank, thermostat, expansion tank cap, and belts while I was at it. After getting the system back together, the car still overheated. I suspected the...
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