2006 BMW 330i loosing coolant and no heat

Asked by Mar 15, 2016 at 06:42 PM about the 2006 BMW 3 Series 330i

Question type: Maintenance & Repair

My 330i is now loosing coolant and the heater isn't
working, it just blows cold air.  I've already replace
the thermostat, water pump, temp sensor, and
upper radiator hose. I haven't noticed any coolant
leaks but I could have missed it. It doesn't really
overheat, I did get the amber warning signal once,
but that was it. The cooling fan tends to get loud
and then it will go away after a while. My expansion
tank gets bone dry. I don't think I have a blown
head gasket, but if you guys can give me some
more warning signs of a blown head gasket, I'd
appreciate it. Other than that, I have no clue what it
could be, unless my water pump failed again, but I
was replaced about a week ago. Any advice would
be amazing!

3 Answers

30

its a bad thermostat id get them to check it again

I just had it changed, do you think it could really be that again? Sorry, just curious! :)

254,345

I"d replace the expansion tank, if the other parts were bad, that is probably your issue. Did you remove the belly pan and get under the car to see where it is leaking? White dry reside is a sign of dried coolant. Any wet spots where you park?

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