My 2007 caliber runs hot on freeway or climbing hills.i have changed oil new thermostat.coolant at correct level no leaks from coolant lines help

Add oil to full or chec for a leak. Inspect all othr fluids. Motor is in distress..the old days it sed nuthn

A hot running engine is usually caused by a cooling system problem. Make sure the coolant level is full and the thermostat.. rad fan.. radiator cap and water pump are all functioning correctly. Make sure there are no restrictions in front of the radiator to obstruct air flow and coolant circulates properly throughout the radiator. As for losing oil, check for the obvious..... Leaks. If no major leaks and you have a high mileage engine, suspect the oil to be burning within the engine. A constantly hot running engine can also cause the oil to break down quicker resulting in consumption, especially if oil changes are neglected

Unless the water pump is leaking that is not the problem. You may have a leaking engine cylinder head gaket have it checked by a local shop.

This may be a simple thing, don't get to nervous just yet. A similar problem came up the other day on fixya.com in reference to another car. Because of the way cars are designed now a days it just may be possible that you have an air bubble or pocket. Usually this happens in engines that sit a little lower than the heater unit. The way you describe your problem with an oil change first, then car running hot, may be purely coincidental. Try these checks first.
1- check for leaks around the engine, any hoses you may have removed when replacing the parts you replaced, thermostat goose neck, and if after filling your radiator has the level mysteriously gone down.
2- is it possible to see and check your water pump, if you can grab the pulley and yank on it hard. Does it have play, if so it could be bad and leaking through the weap hole.
3-you may have a bad head gasket (BLOWN). This could be putting oil into your antifreeze or antifreeze into your engine. If it's in your oil you would have seen this when you did the oil change CHOCALOT MILKSHAKE and more than five quarts. If it's going into your engine then it's coming out your exhaust. When you start the engine, if the exhaust smells SWEET your head gasket is bad.
4- you say coolant temperature light on and coolant level OK. If as I said in the beginning AIR BUBBLE . Remove your radiator cap , run engine to operating temperature, put on your heater, fill your radiator till it maintains proper level. I hope it's this simple for you. GOOD LUCK.

you mention big hills, and other wise no problem, you may be taxing the transmission , have a trans cooler installed, it may cure all your problems, and good for the trans, heat is the trans biggest killer

The most common overheating problem with the Northstar engine is a blocked purge line. It's job is to purge air out of the cooling system.
There is a small diameter hose coming from near the top of the coolant tank,this is the purge line.
With the engine idling,pull the purge line from the tank,if there is no coolant flow from this small hose,it is blocked and this will cause overheating.If the hose is clear, check for blockage at the nipple on the tank.Or trace the hose back until you find the blockage.The hose goes in to the engine to a crossover and comes out the other side to near the thermostat housing,the blockage may be there.

check the sending unit,also when last you serviced the radiator? it may be restricted,also check the fan speed, if equip with a viscos couplier replace,

When the car is completely cool,check the electric fan(s) for smooth rotation.

Clean/check/change the thermo sensor,contact and wire.

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Excavate air pocket in coolant system / check for head gasket leak

This test will kill two birds with one stone.

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MAKE SURE THE COOLANT SYSTEM and ENGINE IS COLD!

RAN THIS TEST IN A WELL VENTILATED AREA ONLY!

You will spill some coolant during this air pocket purge test.......BE KIND TO THE ENVIRONMENT and ANIMAL please clean up after the test!

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Put the front end on a pair of ramp or park your car on a VERY STEEP HILL (radiator facing top of the hill) .

Top of the coolant reserve tank

Let it ran for 10-15 minutes.

Monitor for air pockets escaping from coolant reserve tank.

Small amount of bubbles is OK at 1-5 minute mark

After the thermostat open up (after 195 F warm up) at
5-12 minute mark or after high idle you should see less bubbles.

If you do not see any in rush of bubbles then your thermostat may be partially stuck or rusted badly inside the thermostat hosing.

Give the thermostat host few gentle taps.

If you see larger bubbles surfacing after 15 minutes then should do a hydrocarbon (HC) dye test to test for potential head gasket leak.

Let engine cold down and top off coolant reserve tank.

Start monitor for coolant lost

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A coolant flush is require every 2 years or 24,000 miles.

I recommend the thermostat that has a relief pop-let to reduce the change of burst radiator and coolant hoses.

Make sure you get a new thermostat gasket,black RTV and fresh coolant for the job.

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under maximium load your cooling system is struggling asuming you have an automatic transmission,it is cooled through the radiator,when running the ac your condenser is hot,right in front of the radiator,if your not leaking,and your anti-freeze looks bright green an clean ,and the fan or fans are working ,first change the thermostat,cheapest,remove the serpintine belt and inspect the water pump pulley,spin it by hand,try to tip it forward and backward,to see if it wobbles,it should spin smooth and quiet,if it has a chattering or growling feel,or the pulley wobbles change the pump,the only thing left is the radiator ,make sure that debri or something isnt stuck in front of it a small piece of paper is enough to restrict airflow,inspect the core is it turning green and the fins are falling out ,is the plastic shroud intact around it, lots of things could be going on ,the transmission could be low on fluid,and running hot,causing the excessive load on the radiator,disregaurd this if you have a manual.need more info to pinpoint further,hope this helps

replace the thermostat and check coolant levels. your saying the inside heater blows hot air right?