coolant boiling out of resorior

Asked by Jan 22, 2015 at 08:21 PM about the 2006 BMW 7 Series 750Li RWD

Question type: General

changed themastat  car still over heating coolant boiling out of coolant bottle cap

4 Answers


Radiator cap might also be bad, if it can't maintain adequate pressure and allows coolant to overflow at lower temps than normal. But if it is 'boiling over,' then you might want to have the radiator fluid tested for carbon compounds indicative of a blown head or intake gasket. NAPA sells something called a "combustion leak block tester." (escaping combustion gases are leaking into the coolant and causing it to boil and overflow.)


Did you bleed the air out of the coolant system?

Check your water pump.


Bleed your cooling system

Your Answer:

7 Series

Looking for a Used 7 Series in your area?

CarGurus has 4,773 nationwide 7 Series listings starting at $2,399.


BMW 7 Series Experts

  • #1
  • #2
    Tom Demyan
  • #3
    Vince Lee
View All

Related Models For Sale

Used Mercedes-Benz S-Class
151 Great Deals out of 6,977 listings starting at $3,250
Used BMW 5 Series
390 Great Deals out of 16,395 listings starting at $2,099
Used BMW 6 Series
59 Great Deals out of 2,584 listings starting at $5,999
Used BMW 3 Series
856 Great Deals out of 31,256 listings starting at $1,250
Used Mercedes-Benz E-Class
445 Great Deals out of 19,830 listings starting at $1,995
Used Mercedes-Benz CLS-Class
70 Great Deals out of 2,172 listings starting at $6,000
Used Audi A8
39 Great Deals out of 1,289 listings starting at $4,900
Used Dodge Charger
280 Great Deals out of 31,968 listings starting at $1,850
Used Land Rover Range Rover
107 Great Deals out of 4,790 listings starting at $2,100
Used BMW X5
319 Great Deals out of 18,307 listings starting at $2,799
Used Chevrolet Corvette
91 Great Deals out of 15,032 listings starting at $3,620
Used Mercedes-Benz C-Class
686 Great Deals out of 26,193 listings starting at $1,812
Used Jaguar XF
51 Great Deals out of 2,224 listings starting at $6,750
Used Lexus LS 460
89 Great Deals out of 2,092 listings starting at $7,740
Used Cadillac Escalade
215 Great Deals out of 11,991 listings starting at $2,990

Used Cars For Sale

2015 BMW 7 Series 750Li RWD For Sale
98 listings starting at $29,900
2014 BMW 7 Series 750Li RWD For Sale
7 Great Deals out of 73 listings starting at $25,992

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.