My coolant is leaking? i have a 1998 chevy Cavalier?

[caligurl209]

so i have a coolant leak and i changed the water Pump and i got a new serpentine belt and added more coolant but its still leaking i bought a stop leak but im not sure how to use it or if it will work can anyone help me what do you think it is?..... it was leaking before and i think the leak is coming from the water pump or the coolant tank because that's where i see it when it drips i think it might be that its not fully tight or that i need to put the sealing cream i know its not the radiator i don't know now but thanks for every-ones answers if all nothing works im taking it to a pro

 

[crewchief1949]

Is it a 2.2L engine? If so its probably the head gasket. Pretty common problem with that motor and I can tell you where to look on the motor to see if its leaking. Look on the right hand side of the engine. On the front right corner where the head meets the block. Let it run until its good and hot and thermostat opens. After a few cycles of the t-stat you will start to see coolant bubbling out of that corner.

 

[bojo8127]

If the coolant is leaking from the over flow tank, or bottle, get a new radiator cap, as it's weak and letting the coolant out of the radiator.
Any radiator shop will pressure test the system to pin point the leak.