Had head gaskets changed, coolant warning came on , car is not running hot

BLOWN HEAD GASKET

• coolant from exhaust indicates a blown head gasket or a cracked head on the block

Probably a cracked cylinder head or block, or both. Or the head was warped and the head gasket has blown again.
When the engine gets very hot the gasket expands, and after a few times it will not return to its original shape.

if you haven't had any coolant in your car for a week and you have been driving it you may have blown your head gasket, even though you haven't got 'milkey goo' on your oil dip stick. check for goo under your oil cap to see and have it tested at a garage. but from what ive read im almost certain its your head gasket. hope this helps you and beware of the dangers of a running engine so keep hands and loose clothing out of the way of moving parts and engines get very hot so be careful what you touch.

The engine can burn alot of coolant before you see any smoke.
And having a cooling leak in the engine could cause it to run hot at times.
If you are adding coolant every week and don't see any leaks, the engine has to be burning it. Most of the time it is a blown head gasket and cracked head or block.

Head gasket IS a possibility but not always a probability. There are also the possibilities of a failed thermostat low coolant level without a warning light or simply a faulty radiator cap. A thorough diagnoses is definitely in order here.

the problem could be as simple as a faulty radiator cap from your description the water that is expelled when it gets hot is not being drawn back as the radiator cools down
could be a leak in the reservoir hose
I am thinking that the low coolant sensor in the top of the radiator tank is getting an air space and that is what is activating the light
I don't think it was head gasket problem as you would be overheating or loosing coolant within days not weeks I would go to an accredited radiator specialist shop and have a pressure test done for leaks in the system including the water pump leaking when running
I am saying that the vacuum created as the coolant cools down is not as good as it should be to draw water back from the reservoir to keep the radiator full to the cap

you have a cracked head. coolant is running into intake and flooding cylinders.

It's going to run hot, especially in hot weather but one big thing is what kind of coolant you are using. If it's dex-cool ( chevy and gm brand ) get it out of there and put some pre-mixed good coolant / water mix and it will help a whole lot. Just had the same problem with my 02' blazer. If the water pump and thermostat have been changed you should not be having a problem.

it sounds like it may have air in the system there should be a bleeder valve for the coolant also if it ran hot you may have a possible head gaskt problem i would try bleeding the air out of the coolant system and if problem is still there you can buy a kit to check the head gasket it hooks to the coolant system and you pour a liquid in it and if it turns from blue to yellow it has a head gasket problem