BMW 01 Expansion Tank anti freeze empty in two days

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

232,505

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. www.fcpeuro.com and purchase the coolant system refresh kit.

232,505

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

255

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

  • Please help. 545i bmw 12 answers

    My 545i gives a p0491 and p0492 error code. It also has white smoke coming from the exhaust pipe...could the error code be the reason for the white smoke.. those are the only two error code that I...

    2005 BMW 5 Series 545i

    -

    Maintenance & Repair

  • 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 ? 6 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

  • BMW 325 3 answers

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

    2008 BMW 5 Series

    -

    General

5 Series

Looking for a Used 5 Series in your area?

CarGurus has 15,046 nationwide 5 Series listings starting at $2,499.

ZIP:

Search BMW 5 Series Questions

BMW 5 Series Experts

#1 Tom Demyan
Tom Demyan
Reputation 2,010
#2 Michael Branan
Michael Branan
Reputation 780
#3 Robert Charlson
Robert Charlson
Reputation 680
View All

Related Models For Sale

Used BMW 3 Series
942 Great Deals out of 33,248 listings starting at $1,000
Used BMW 7 Series
189 Great Deals out of 5,991 listings starting at $2,999
Used Mercedes-Benz E-Class
377 Great Deals out of 21,641 listings starting at $699
Used BMW X5
430 Great Deals out of 16,325 listings starting at $2,000
Used Mercedes-Benz C-Class
474 Great Deals out of 28,392 listings starting at $1,499
Used BMW M5
15 Great Deals out of 638 listings starting at $13,495
Used Audi A6
134 Great Deals out of 6,469 listings starting at $999
Used BMW M3
38 Great Deals out of 1,715 listings starting at $4,544
Used Mercedes-Benz S-Class
136 Great Deals out of 6,535 listings starting at $1,200
Used Audi A4
188 Great Deals out of 10,703 listings starting at $700
Used Honda Accord
711 Great Deals out of 86,747 listings starting at $1,250

Used Cars For Sale

2017 BMW 5 Series 530i For Sale
902 listings starting at $51,212