05-05-08, 09:59 PM
I've read in many posts and replies that checking for bubbling in the surge tank when the car is cold can indicate a bad head gasket. My question is how much bubbling are we talking about? When I do this I see a very, very slight amount of bubbling at the left corner of the tank above where the bottom hose connects to the system. It's so slight that I would describe it as almost being like the fizz you see from a soft drink but it's very isolated in a very small spot in the tank, about a dime size area where I see the bubbling. Wouldn't there be some bubbling just from the movement of the coolant through the system?