BMW 01 Expansion Tank anti freeze empty in two days

Herberth Chito Flores

Asked by Oct 19, 2014 at 11:43 AM about the 2001 BMW 5 Series 530i

Question type: Maintenance & Repair

Expansion Tank anti freeze empty in two days WHY? THERE IS NO LEAK

3 Answers

Tom Demyan

There has to be. Look for a wet spot or white reside to indicate dried coolant. The expansion tank will leak from the smallest crack that you can't even see, only under pressure. If it is the original, replace it now with the hoses, thermostat and water pump. and purchase the coolant system refresh kit.

Tom Demyan

Maybe a failed head gasket? How does the oil look?

Patrick Burke

There may be an air pocket in the system. If you have recently flushed and/or done any work with your coolant, it can cause this (mine did it just 2 days ago!). Turn the car on, fill the coolant reservoir with the cap off (MAKE SURE IT IS NOT HOT!!!), and let it cycle. As it warms up, squeeze the large hose on top to "burp" the system. I hope this helps - Good Luck!!

Your Answer

Add photo

Related Questions

  • Bmw troubles 4 answers

    I just got my car out the shop. Spent about 700 dollars on a fuel pump and a new MAF. Two days after getting it back from the shop. I went to start it up, and had a very rough idle. Little to no po...

    2003 BMW 5 Series 525i


    Maintenance & Repair

  • very slow water leak? 4 answers

    I recently bought a 1995 bmw 540i and have done a few things to bring it back to par. However, I have been having to add some Prestone 50/50 to cap off the fluid. It is such a small amount each fe...

    1995 BMW 5 Series 540i


    Maintenance & Repair

  • Engine Replacement ? 3 answers

    This is a question about a 2007 BMW 530 xi with 150K miles. I bought this car from a used dealer on 4/12/15. Apparently there is no warranty. I go for an oil change on 5/1/15 and am told that all ...

    2007 BMW 5 Series 530xi


    Maintenance & Repair

  • Completed Pan Valley job ('01 6 spd) 6 answers

    It really wasn't that bad. Had a piece of gasket stuck to the block I missed twice. 3rd time's a charm though. Good news is I can now tear down the engine to the intake in less than 30 minutes. If any...

    2001 BMW 5 Series


    Maintenance & Repair

  • BMW 325 3 answers

    if i mistakenly put a gallon of diesel in my BMW, would this harm the engine ?

    2008 BMW 5 Series



5 Series

Looking for a Used 5 Series in your area?

CarGurus has 18,798 nationwide 5 Series listings starting at $1,500.


Search BMW 5 Series Questions

BMW 5 Series Experts

#1 Tom Demyan
Tom Demyan
Reputation 1,740
#2 Michael Branan
Michael Branan
Reputation 710
#3 Robert Charlson
Robert Charlson
Reputation 670
View All

Related Models For Sale

Used BMW 3 Series"
1,609 Great Deals out of 39,618 listings starting at $888
Used BMW 7 Series"
194 Great Deals out of 5,867 listings starting at $2,995
Used Mercedes-Benz E-Class"
764 Great Deals out of 22,807 listings starting at $1,850
Used BMW X5"
548 Great Deals out of 15,638 listings starting at $1,995
Used BMW M5"
39 Great Deals out of 607 listings starting at $7,990
Used Mercedes-Benz C-Class"
885 Great Deals out of 32,203 listings starting at $1,200
Used Audi A6"
158 Great Deals out of 6,819 listings starting at $2,195
Used BMW M3"
86 Great Deals out of 1,918 listings starting at $5,495
Used Mercedes-Benz S-Class"
174 Great Deals out of 6,641 listings starting at $1,899
Used Audi A4"
316 Great Deals out of 13,019 listings starting at $1,500
Used Honda Accord"
1,255 Great Deals out of 78,694 listings starting at $1,400

Used Cars For Sale

2016 BMW 5 Series For Sale
74 Great Deals out of 7,521 listings starting at $33,999
2015 BMW 5 Series For Sale
12 Great Deals out of 407 listings starting at $22,191
2014 BMW 5 Series For Sale
57 Great Deals out of 1,418 listings starting at $19,495
2013 BMW 5 Series For Sale
173 Great Deals out of 2,515 listings starting at $13,900
2012 BMW 5 Series For Sale
35 Great Deals out of 726 listings starting at $13,990