A bad head gasket or a cracked head(s).
A bad head gasket or a cracked head(s).
The same thing that causes soda to bubble when it is poured on almost anything.
There is no coolant cap. You add through the expansion chamber (opaque bubble to the left of motor.)
Low coolant level.
when u have low coolant
The coolant level may be just a little low and you're getting air bubbles through the coolant that circulates into the heater core. It doesn't cause any problem and can make that noise even if there IS enough coolant. Sometimes, even when the coolant level is up, an air bubble can get caught in an engine and when it makes noise it can cause concern, but it won't damage anything.
Might be a head gasket issue or cracked head but if so it will usually bubble back into the coolant overflow when you shut it off, or coolant in the oil when you do an oil change. If it is an electric fan setup it may only be working some of the time.
Normal causes are low coolant and an inoperative radiator fan.Normal causes are low coolant and an inoperative radiator fan.
yes, it would
There is air in the system, probably from a head gasket leak
Low coolant
Low coolant? Bad sensor?