Hello i have a2009 pt cruiser with a antifreeze leak but i cannot find the leak anywhere seems that the engine can overheat a little when i drive then stop seems like cooling fan is coming on i am going to flush the system and put new antifreeze in but would like some more input on what it may be

Won't overheat it, but isn't the best option. If you live in a cold climate it can make the antifreeze weak and cause it to freeze though, causing severe damage. Always best to add a 50/50 mix of the recommended antifreeze.

Blown headgasket,letting coolant into the combustion chamber.

bleed your water system n tel me the equasion

Check your electric radiator cooling fan I have replaced them for seizing up. If it can'nt cool the radiator car will overheat.

Well it is not that old, so first I'd check the coolant cap for damage or leaks-check and replace that cap. If this does not cure it, you might have a major problem like a blown head gasket, do not run it to the point that it overheats until you make sure the antifreeze is up to full and the cap is good-then start looking for leaks, and check the oil and the antifreeze for contamination (oil in antifreeze or antifreeze in oil)-either needs to be fixed, and the less you run it if these conditions exist the better your chances of limiting the damage.

Hello, if your car has a blown head gasket and exhaust is entering the coolant system, it will continue to run hot until it is repaired. Using pure antifreeze will make it worse. It should be at least 1/2 water. If the coolant reservoir didn't leak you could probably drive a few more miles, but not many, before it overheats again. All that is doing is giving you a little more capacity. If you continue to run the engine hot you are going to do more serious damage to it.
I suggest you have the head gasket replaced. That stuff you put in there seldom works, and if it does work, it's only temporary.

I hope this helps.

YOUR HEATER CORE IS LEAKING ITS IN SIDE AND YOUR FAN BLOWS THRU IT THATS WHY THE SMELL GETS STRONGER WITH THE FAN ON

Valve is chk valve for vacuum. Any recent brake work? May just need brakes replaced.

look at the exhaust... if it is white you are burning antifreeze. try that first and if it's a no we will explore it further.

The engine number is the 8th digit in the VIN which for this should be a B 2.4L.