Just wanted to ask some questions.

My car has a b16b in it and when i drive for a good bit my coolant overflow fills up all the way and then after i let it sit it goes back into the radiator.
aldo the car eats some coolant.

and if i come ome and let the car sit overnight and open the red cap the next morning tons of bubbles and air bubble up in the coolant overflow.

car has never overheated but im pretty sure it is a headgasket just asking to be sure.

 

anyone?

 

it is simple to check for HG.
Pull the plugs. If two are dirty, the others clean. Yes.
You can also check to see if coolant is getting into the chambers with one of those flexible camera things.
If it is 'boiling over' without getting hot then yes most likely you have a blown HG.
If you fill the coolant and pressurize the system you may be able to actually hear it bubble into the chambers with the pugs out.