After I turned my car off and checked the coolant in the reservoir I saw small bubbles in the coolant?

Question

It looked similar to boiling water, bubbles poping up. Is this normal? Does coolant actually boil? Prior to turning off the car, my temp gauge was reading normal.

Answer 1

this is normal. the coolant expands and contracts in the radiator and
fills and empties out of the coolant jar.....

If you hear a lot of loud gurgling it might be too hot.

check it often and see if it ALWAYS does it or just if youv'e been doing something that might create more heat. Like stop and go driving with the AC on.

Answer 2

I had this difficulty on my bmw as quickly as. It have been given so undesirable that it grew to become into growing to be a fountain of coolant taking pictures out of my motor vehicle. Amazingly i grew to become into waiting to renounce the subject for each week or 2 with the help of basically utilising radiator provide up leak. the stuff which you would be able to get at automobile zone or kragen for $a million.ninety 9. In that factor physique nonetheless I had to bypass out and purchase a clean radiator and coolant tank, hoses, ect. you may ought to bypass and purchase a clean cooling gadget.

Answer 3

is the radiator cap old? the spring under the cap can get worn out and release coolant under pressure back to reservoir too easily or vice versa

also, if you have electric fan make sure it function correctly.

Answer 4

the water in the rad is that hot yes,and when your running the motor with the rad full,its natural for some water to go into the overflow