My car started making a gurgling sound yesterday on my way home from work. i have no idea what it could be please help.

it also made a knocking noise too. not sure what to do.

a gurgling is usually either at (overflow tank filling) or b the heater core filling..did it sound from inside the car or the engine bay is the knock consitent or what are the conditions of knock

it was gurgling from engine and the knock was from the right side of engine but it only knocked twice. i just replaced the radiator cap and now i don't hear any noise i'm not 100% sure that is the fix but will see tomorrow morning on my way to work.

Well keep us updated and what type of lknock (light tap hollow deep )