It is not overheating.temp is always normal.the high pressure stays in the overflow bottle until i release it and the low coolant level indicator comes on. when i remove the cap off the overflow bottle the coolant level comes back up and the low coolant level warnig goes away.
SOURCE: Coolant filling up overflow bottle
You may need to ask AAA to put a radiator pressure tester on the resevoir bottle and pump it up to operating pressure(Pressure cap rating) and see if it over pressurises while it is running at operating temp,rev engine up and down and watch what the testers pressure readings do,it should move up and down in sync with the water pump.If the pressure keeps building i would have to believe that combustion chamber gases are over pressurising your cooling system.Also test the pressure cap is functioning within factory specs.
SOURCE: Low coolant light, temp normal
you should fill the radiator and the reservoir to the cold line.. an yes check for leaks it has to be going down for a reason.
SOURCE: Intermittent overheating problem, 1996 dodge
The relay. There is a black box on the right hand side of the engine at the top corner. It encloses all the relays. Make sure you are looking at the diagram well. Exchange the relays and remove the wiper relays and exchange them with the radiator fan relays. Start the engine, run it for 5 mins and see if they kick-start.
SOURCE: 1997 2.4L Chevy Cavalier LS; Low Coolant Indicator and Temp Gauge
take the cap off of the radiator (whil engine is cold) start and run the vehicle. keep runnig 30mins after the vehicle is hot keeping notice of the rad fluid level.
keeping the cap off will prevent the pressure build up that woiuld keep the air in the system, keep adding water or antifreeze as the level goes down. this may take an hour or so.
also with the cap off, you will be able to see if your water pump is operating correctly. you will visibly be able to see movement in the rad when the pum is engaged.
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