I HAVE FLUSHED AND CHANGED THE THERMOSTAT THE TEMP WILL GO UP TO NORMAL RANGE THEN GO DOWN TO 175 OR SO IT IS A 2003 PONTIAC GRAND PRIX DO YOU THINK IT NEEDS A WATER PUMP AND THE AIR IN THE CAR WILL BLOW WARM AIR NOT HOT AIR.
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Re: THE CAR DON'T GET TO THE RIGHT TEMPERATURE
I dont think it needs a waterpump. what temperature thermostat did you put in? unless the fan is running all the time maybe. i would try another thermostat, the engine needs to be at least 195 degrees to produce decent heat.
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Temp is controlled by an electric motor(or could be vacuum hose) on the blender door of heater housing. If you find this is operating correctly, then the problem is a plugged heater core.Backflush it by removing both heater hoses and flushing from water pump side toward thermostat side.don-ohio
Where do you live?
This has been a hot summer, bit hotter than usual due to the solar flares going on...
as long as the pointer stays within normal operating range, you must not worry... especially since you changed the thermostat and did a flush, did you make sure you got the right temperature range thermostat installed, rarely but few times that seems to be the problem, hotter thermostat gets installed by mistake.
The range should be in the temp range of your thermostat within in a few degrees, you probably have a 190 degree thermostat. As the outside (ambient) temp rises it's normal for the engine to run a little hotter 200 degrees is safe with coolant, water boils at 212. Your fans should cycle, so it sounds like your temp sensor is faulty. if you haven't flushed your radiator and changed your thermostat lately, now would be a good time to do so. Hope this helps,
You should make sure there is no air in the cooling system-from a cold start, let it idle until the radiator fan kicks on with the surge tank cap off-make sure the tank is fully up to level at this point, that should eliminate air in the system as a cause. If you do not have a scanner that gives live readings, get one so you can monitor the engine temp-a factory gauge is not overly accurate. Your temp when warmed up, air off should go to about 212-215 and the radiator fan should then kick on-temp should drop to about 200 and the fan should shut off-this is normal.
250 DEGREES ENGINE GETTING TOO HOT.SOUND LIKE CLUTCH FAN FREEWHEEL.IF CLUTCH FAN DONT LOCK IN OR HAVE RESISTANCE TURNING BY HAND WHEN ENGINE HOT.FAN CLUTCH IS BAD.IF FAN CLUTCH OKAY COOLANT LEVEL CORRECT.I WOULD CHANGE THERMOSTAT FLUSH OUT ENGINE AND RADIATOR.IF ENGINE TEMPERATURE STILL READS 250 DEGREES OVER FLOW JUG OR RESERVOIR NOT BOILING OVER THE COOLANT TEMPERATURE SENSOR FAULTY.
SOUND LIKE PROBLEMS IN THE AIR TEMPERATURE CONTROL DOOR NOT OPENING.CLIMATE CONTROL VECHICLE HAS TO BE HOOKED TO DIAGNOSTIC EQUIPMENT TO CHECK.IF YOU REPLACED THERMOSTAT.FLUSHED HEATER CORE AND RADIATOR.YOU HAVE THE RIGHT AMOUNT COOLANT IN THE COOLANT SYSTEM.LET DEALERSHIP CHECK IT OUT.
If the shop installed a different thermostat (there are different actuation temperatures), the normal position of your gage will change accordingly. As long as it's still in the normal range and stays at a new "normal" level, I'd say you're OK. If it is getting too close to the red, ask them to reinstall a lower temp thermostat.
well not usally it sounds like the thermostat is sticking i had this promblem on my 01 grand am it was themostat sticking i fixed that by replacing thermostat it worked fine for a year then started to do it again finally noticed that my antifrezze was dirty and i needed a flush have you flushed or changed yours best bet flush the antifreeze then replace thermostat