ok i did a search and i found a little about it, but i wanted to make sure what i found out is the right thing to do

after i drive my car and go under the under the hood, i nottice a boiling noise? it comes from the intercooler/overflow chamber section

is that normal or what i read it sounded like i gotta replace the cap?

 

i heard the same "boiling, bubbling" noise one day after i was driving hard. i dont know what it was but it hasnt done it since.

 

a quick search will tell you that there is air in your coolant. burp the system.

 

Precisely