My 98 mazda seems to not be circulating the water correctly and we went througheverything and the water pumps new the head gaskets new theres no leaks. so we are stumpd and really need help

Wrong water pump or belt routing isn't correct.

my 98 Blazer I had to replace radiator water pump heatercore and hoses. Had head gasket go. Once that happens air and dexcool corrode cooling system. Do you smell antifreeze? Are you loosing antifreeze? Check oil see if its another color not clear or black but i think light brown. Have you flushed out system?

checked water pump for circulating the coolant?
checked the radiator if the coolant circulated correctly?
thermostat renewed?
thermo switch checked whether is working?
fan switch checked whether is working?
checked whether the matrix could circulate the coolant?
ckecked whether there is any valve on the matrix hoses and is working?
have you bled the cooling system ?
have you checked whether you have a cylinder head gasket with problem and pressurized the water?
checked whether have a cracked cylinder head and on accelaration expanded the water hoses?
have you checked whether the radiator cap is working ok?
have you checked whether the radiator cap is with the correct pressure for the cooling system?
checked whether the cooling fan is working?

From weher is woter leak? It maybe water pump to faulty!
Is the oil braun - black or white?

seems like you have done the right things. i have repaired cars with same problems and it is the head gasket..the ones I worked on did not have any water in the oil but when I pulled the head off the gasket was blown. Let me know if that helps

Bad head gasket

Assuming the following;
The head gaskets were replaced properly
The Water Pump was replaced properly
The Thermostat was replaced properly

There are only a few other things to check.
1) if you you remove one of the heater hoses from the engine bib during a cold filling from the radiator - it will release trapped air until you see the coolant coming out the motor side - this works great to ensure the air is out. Hook hose back up before running.(or you could leave the hose off for a second and start it to see if water gushes out - water pump check - kinda messy though)

Remember that heater water will circulate even with the thermostat is closed.

if that does not work, then you need to ensure the top hose going to the radiator warms up indicating the thermostat is opening and hot engine water is starting to dump into the radiator.

2) the radiator more than likely is clogged and needs cleaning by a radiator shop, or replacement if it is not one that can be cleaned.

Ask your son if he remembers looking into the water ports where he took off the old water pump, sometimes of the system is not flushed at proper intervals, it will sludge up the water jackets and keep water from circulating through the motor.

one last thing (gulp) That CO check is pretty accurate - and cheap. You might want to have it checked again - because the heads should have been inspected for cracks as well as pressure checked before putting them back on - especially since the motor overheated. That alone will crack the heads beyond repair - more so than not.

Let me know if you have any other questions.

Good Luck.

what gasket are you talking about the head gasket? if so its about a week to do the job typically cause have to take heads off and can figure run into multiple problems along the way and need a new valve cover gasket cause it will fall apart and a new water pump and new water pump gasket

have you checked the waterpump it is 10yrs old could not be circulating the water, also have it pressure checked to see if it leaking or loosing pressure.

head gasket or blocked radiator?