Coolant does not return to rad from overflo

100

Asked by Aug 18, 2017 at 04:18 PM

Question type: Maintenance & Repair

I have a 2008 pt cruiser. Have changed rad
cap, hoses and thermostat and pressure is
good. Coolant flows to overflow but not
back to rad when cool. Car will overheat
when I drive for like 3+ hours at highway
speed

4 Answers

100

Rad is one year old as well

150,415

Maybe you have the wrong type radiator cap.

100

Have a new one and according to the computer at part store it's for this car and was the only one listed

150,415

A leak in the system will cause the cooling system not to develop the vacuum necessary to pull the coolant back into the radiator. https://jimdinner.wordpress.com/2012/07/09/radiator-caps-explained/

Your Answer:

Maintenance & Repair Experts

  • #1
    dandyoun
    Reputation
    110,330
  • #2
    tennisshoes
    Reputation
    103,530
  • #3
    tenspeed
    Reputation
    87,060
View All

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. Content will be removed if CarGurus becomes aware that it violates our policies.