If you changed you water pump and thermostat and the car is not running but the reservoir steel bubbles

SOURCE: 2000 Sunfire coolant problem. Engine overheating,

ok, its time for a radiator flush. there is major sludge in the internals of this radiator. Make sure the thermostat is in the correct position as well. I've seen many cars come into my shop with the thermostat inserted backwards.

SOURCE: Water pump problem?

You need to make sure you don’t have an air lock. Find the bleeder valve for the coolant system and release the air. If you can’t find the bleeder, find the highest hose for the coolant system and make sure coolant is flowing through it.

SOURCE: 1998 aurora

I have had this problem with my 98 aurora and have replaced all the same components. Temp gauge routinely shows 200 on highway (Fine) but in the city in stop and go will get to around 245. I installed a switch to manually turn on the cooling fans by connecting the ground to pin 86 in the relay for the fan(s). Otherwise the fans will not turn on to 245. This fix works but would like to know an actual solution.

SOURCE: 01 Intrepid 2.7 overheating

Although you have flushed the system what it sounds like is that it may have a blocked heater matrix, when you run it up can you feel the temperature of the pipes going into and coming out of bulkhead to matrix also check temperature of all pipes in engine bay as definitely sounds like a blockage somewhere same with main radiator does it feel the same temperature all over? If this throws no light then suggest to get a cylinder head gasket test kit which is widely available and all you do is insert it into coolant expansion tank and see if changes colour if exhaust gases are present.

danoyachtcap

• 2907 Answers
• Posted on Apr 25, 2015

SOURCE: my 2000 lincoln ls overheating and i have changed out the water pump thermostat and the radiator and the hydraulic pump solenoid and the reservoir tank and it do's not stop overheating

Overheating? Try this procedure:

• The thermostat can be stuck close. If you feel the upper hose very hot and the lower hose cooler than normal, it may be a stuck thermostat.

• Make sure the radiator and the overflow bottle are filled to the proper levels.

• Bleed air from the coolant system:This is best done by running the engine with the radiator cap off until you see when the air bubbles stop coming up.

• Check the radiator fans: The easiest way is to turn on the cars air conditioner and turn up the A/C fans. Both radiator fans should come on when the A/C starts

• Make a pressure test by using a pressure testing tool (available at most auto parts stores). Use the pressure shown on your radiator cap. Most cars are 16 PSI or less, so don't exceed that pressure. Replace the radiator cap if it doesn't hold the pressure.