Over heating water pumb/radeator/thurmastat/and stell overheating

I had the same problem. The mechanic cleaned the heater line which was clogged with rust.

It could be the thermostat or the water pump. Even if your heater core were plugged, the engine would not overheat from it, you would just have no heat. And if the thermostat were stuck closed, but the heater core was good, you would still get heat from heater while the engine was overheating. So it kind of points toward the water pump, unless neglect had allowed both the heater core to plug and the thermostat to stick closed. I mean neglect from not regularly changing the coolant every two years about.
Overheating can be as simple as a low coolant level, so you should check that, and check for leaks.
Before you go for the cost to replace the water pump, you should first have the system pressure tested, or have a compression test done to check the internal condition of the engine and to make sure you don't have a blown head gasket. Good luck.

You may have a leaking engine head gasket or a clogged radiator. Do not drive this until the problem is repaired or you will do serious damage to the engine.

Two issues:
One is check the fan clutch to make sure that the fan is turning on to cool the engine, also it is recommended since it overheated to change the thermostat.

2nd. This sounds like a MAF (Mass Air Flow Sensor Valve) or a EGR Valve, if you have a check engine light on, take it to your local parts store and they will scan it for you at least sending you in the right direction.

IF CAR OVERHEATING AT STANDSTILL OR IDLING IN A LONG TRAFFIC LINE.COOLANT FAN NOT TURNING ON.MORE LIKELY COOLANT TEMPERATURE SENSOR NOT WORKING.USE A SCANNER TO CHECK COOLANT TEMPERATURE WHEN ENGINE HOT.IF TEMPERATURE READ LOW COOLANT TEMP.SENSOR BAD.IF SENSOR OKAY.CHECK COOLANT FAN FUSE AND RELAY.ALSO HOTWIRE FAN TO SEE IF FAN MOTOR WORKING.IF NO REPLACE FAN MOTOR.IF FAN MOTOR GOOD FUSE AND RELAY COOLANT FAN MOTOR WIRE CONNECTOR IS DAMAGED OR HAS BROKEN WIRE.

do a compression test on all 6 cl. I bet you have a headgasket out of it or a cacked head

You have a blown head gasket for my nickel - look for water in the oil - or oil in the water

open radeator cap not plastic overflow tank. and check water fill radeator if empty and vacune out resavor tank wit wet dry vac to open line to radeator it may be filled with dirt

check to make sure the bottom radiator hose is not collapsing. sticking together. once it sucks together its like the thermostat being closed. the faster the engine turns the it sucks together. also make sure its not the clutch on the fan gone bad. if it has one. to ckeck ,look under hood at fan ,have someone to rev engine. make sure the fan turns as fast as the engine turns . if it doesn't it's a bad fan clutch. goe put a new one on.

have the water pump checked out to make sure its working right. if its not it wont allow for the water to circulate through the system,