Engine overheating

I failed to include a new water pump and hoses. Heater works good.

Yep it was the head gasket its going to cost me $1300.00 to get it fixed boo! Thanks for the guides though really helped. I love this site

2000 Chevy Tracker, 2.0L J20A

Problem: Overheats

Replaced water pump, rad cap, and thermostat with no luck. Did the a pressure test for head gasket. Came back ok.

Vehicle (after new parts installed) works if: I open up rad cap and run vehicle for 15-20 minutes. Then I can drive without overheating. If I turn on the the heater - vehicle overheats.

Any suggestions?

If it only starts to get hot after you turn the heater on. I would suggest checking the heater core. If it has any blockage obstructing the flow of coolant then it could cause overheating.

00 chevy tracker overheating. Replaced termostat and hoses still overheating

Just bought a 2000 Chevrolet Tracker, drove it for 2 hours perfectly fine. Turned the a/c on within 2 minutes the air was cold then completely stopped working. I shut the a/c off and it began over heating fast. Pulled the car over and had my dad look at it after it cooled. He changed the water pump & heat sensor. The car would sit running with no problems as soon as I began driving it the heat gauge steadily made it's way to H. He checked the fans and they worked fine. Now the car will not start without being jumped and it will overheat everytime you try to drive it. Any suggestions?

Yes sorry not great with cars my dad is and is dumbfounded by my car

I have replaced the thermostat, water pump, serpentine belt and still the car overheats. The top rad hose is boiling hot while the lower rad hose is ice cold which I know points to the thermostat but it has been replaced. Any help would be appreciated. This just started out of the blue. The car has been well maintained with very few problems up until now.

Thanks rasmataz, I tried your ideas. I took off both upper and lower rad hoses and removed the thermostat(again). I flushed everything and made sure the thermostat opened under boiling water. Bled the system by leaving the rad cap off until it heated up. Still the same problem. The waterpump housing is too hot to touch yet it overheats and the lower rad hose is cold?

This may help or not. The car is still overheating but also not charging. New battery and alternator but on a test drive after a boost it just starts losing power up until the point when it will die. The car bucks and also stays on a fast idle prior to shutting down. Not sure if that helps with a diagnosis but I thought I would add it just in case. Thanks again for any advise.

Engine Cooling problem
2001 Chevy Tracker 4 cyl Two Wheel Drive Automatic 143000 miles

We have replaced the thermostat, hoses, alternator, battery, and flushed the system. But it still overheats. No leaks, water moves in the system, but as soon as it is drive, it overheats within a half mile. Any suggetsions? Thanks!