engine bubbling

[berry]

Sorry the "coolant surge tank pressure cap"

[Money pit Beretta]

Oh so you have the newer tank and nothing on the radiator. Many things changed after 1990. All I seem to know is the 90 and the 95(a little about the pre 90's).

[berry]

Uh ok thats why the rad cap.
Yes I have the newer one.
Can I also burp the cooling system by venting the pressure cap?

[Money pit Beretta]

Yes you can. It takes the place of the radiator cap in the newer cars. Oh man do I miss the one on the radiator.

[berry]

I'm pretty sure I've found out the reason of the bubbling. Ronaconda was right. It was the cap! The cap wasnt closed enough. Thats why air came into the coolant tank and made it boiling and bubbling. I lost nearly one pint coolant thru the unclosed cap. Had to refill the coolant. I didnt know that I have to close the cap sooooooooo tightly. Now after closing the cap very very very very extremly tightly I havent got any problems more. By the way I should clean the coolant tank. Too dirty to see thru. Thats why I have to open it every time when I wanna check the coolant.

*** EDIT it was def the cap. thanks to all for the help!! right now I have bigger problems to solve.
you can close the thread if you want ***