I want to run radiator cleaner through the cooling system and change the coolant but don't see a radiator cap anywhere. Vehicle was filled with 5 year/150,000 coolant from the factory. Plan on refilling with 50/50 Dex-Cool mix.
If you dont see a radiator cap then the cap for your resevoir tank also serves as your radiator cap, thats where you would put your radiator cleaner and dex-cool in at. it is pressurized just like a normally radiator is with a normal radiator cap on it so dont open it when its hot! the resevoir cap should also have dex-cool stamped on it
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There is no "radiator cap" on the Alero. It has a pressurized recovery tank (overflow bottle) integrated into the cooling system. Unlike other cooling systems where you can add coolant to the coolant reservoir when the engine is hot as there is no pressure in the reservoir, these tanks are at full system pressure and must be allowed to cool down in order to check levels and/or add coolant. This is the only place in the system that allows for coolant input.
YOU NEED BLEED AIR OUT THE COOLING SYSTEM.WAIT TO ENGINE COOL DOWN.YOUR VECHICLE YOU HAVE TO POUR COOLANT IN THE COOLANT OVERFLOW JUG UNTIL COOLANT LEVEL STAY AT THE FULL COLD MARK.THEN START ENGINE LET IT IDLE A FEW MINUTES WATCH COOLANT IN THE OVERFLOW JUG WHEN IT DROPS ADD MORE COOLANT UNTIL COOLANT LEVEL STAY AT FULL COLD MARK.WHEN COOLANT LEVEL STOP DROPPING IN OVERFLOW JUG.SCREW RADIATOR CAP BACK ON OVERFLOW JUG WATCH ENGINE COOLANT TEMPERATURE GAUGE AS COOLANT TEMPERATURE START CLIMBING TURN OFF ENGINE LET IT SET A WHILE KEEP FROM GETTING SCALDED.TAKE LARGE RAG PLACE OVER COOLANT OVERFLOW JUG CAP SLOWLY OPEN RADIATOR CAP A LITTLE AT A TIME UNTIL PRESSURE RELEASE.REMOVE OVER FLOW JUG CAP.ADD MORE COOLANT UNTIL COOLANT LEVEL AT THE FUL COLD MARK ON THE OVERFLOW JUG.THEN SCREW CAP BACK ON THE OVERFLOW JUG.START ENGINE LET IT IDLE AGAIN WATCH ENGINE COOLANT TEMPERATURE GAUGE WHEN TEMPERATURE GAUGE START CLIMBING.TURN OFF ENGINE WAIT A WHILE.CHECK COOLANT LEVEL IN THE OVER FLOW JUG.DO THIS PROCEDURE UNTIL THE COOLANT LEVEL IN THE COOLANT OVERFLOW JUG STOP DROPPING AND STAY AT FULL COLD MARK,WHEN THE TOP RADIATOR HOSE GET HOT THERMOSTAT OPENING AIR IS OUT THE COOLANT SYSTEM. WHEN ENGINE COOLS DOWN.CHECK COOLANT OVERFLOW JUG COOLANT MUST BE IN THE COOLANT OVER FLOW JUG AT THE FULL COLD MARK WHEN ENGINE COLD. DONT .DONT OVERFILL COOLANT OVERFLOW JUG.KEEP COOLANT IN THE OVERFLOW JUG IF YOU LET COOLANT OVERFLOW JUG RUN DRY AIR WILL BE DRAW IN COOLANT SYSTEM CAUSE ENGINE TO OVERHEAT.
Check radiator fan relay first by changing with another with same part number in the fuse panel.If its good check for 12 volts at the fan switch coming in and going back out.If their is going back out replace fan switch.
Run the car with the radiator cap off and let it get warm. You should see the coolant flowing through the radiator. If you don't see the coolant flowing, you may have a thermostat that's not opening or less likely, a bad water pump. Also, you ned to make sure that the cooling system is completely full; when you take the radiator cap off that condition will be immediately apparent.
BLEED AIR OUT COOLANT SYSTEM.WAIT UNTIL ENGINE COOL DOWN.REMOVE COOLANT OVER FLOW PRESSURE CAP.IF YOU HAVE 3.1 OR 3.4 ENGINE OPEN AIR BLEED SCREW ON WATER PUMP BYPASS HOSE.OPEN BLEED SCREW.WATCH COOLANT IN OVER FLOW AS YOU OPEN BLEED SCREW COOLANT WILL DROP IN OVER FLOW JUG. AS IT DROPS CLOSE BLEED SCREW ADD MORE COOLANT IN OVER FLOW JUG DO THIS UNTIL COOLANT LEVEL STAY AT COLD FULL MARK.WHEN DONE TIGHTEN BLEED SCREW DONT OVER TIGHTEN IT OR IT WILL STRIP OUT BREAK.CRANK CAR UP UNTIL THERMOSTAT OPEN THAT WHEN TOP RADIATOR HOSE GET HOT.WATCH COOLANT GAUGE,IF ENGINE TEMPERATURE RISES TURN OFF ENGINE WAIT UNTIL COOL.REMOVE RADIATOR PRESSURE CAP USING A RAG TO KEEP FROM GETTING HANDS SCALED.ADD MORE COOLANT IF NEEDED WHEN ENGINE COOLANT STOP DROPPING IN OVER FLOW JUG AND ENGINE DONT OVER HEAT AIR IS OUT OF COOLANT SYSTEM.
Alero, Grand Am 1999-2005
Thermostat - Removal & Installation
If equipped with an automatic transaxle, remove the exhaust
manifold, as outlined in this section.
Drain the cooling system.
Remove the thermostat housing to water pump feed pipe bolts.
Remove the thermostat housing to water pump feed pipe.
Fig. Thermostat mounting-2.2L engine
Remove the thermostat.
Install the thermostat.
Install the thermostat housing to water pump feed pipe.
Install the thermostat housing to water pump feed pipe bolt.
Tighten the thermostat housing to water pump feed pipe bolt to 89 inch
lbs. (10 Nm).
If equipped with an automatic transaxle, install the exhaust
manifold, as outlined in this section.
Fill the cooling system.
Disconnect the negative battery cable.
Drain the cooling system to a level below the thermostat housing.
Remove the air cleaner assembly.
Disconnect the surge tank line from the thermostat housing.
Remove thermostat housing-to-intake manifold attaching bolt and
nut, then remove the housing.
Remove the thermostat.
Clean all gasket surfaces completely.
Insert the thermostat in the intake manifold.
Attach the thermostat housing to the intake manifold.
Install the mounting bolt and nut. Tighten to 18 ft. lbs. (25 Nm).
Install the air cleaner assembly.
Connect the surge tank line to thermostat housing.
Refill the cooling system.
Connect the negative battery cable, remove the radiator cap, then
start the engine. Allow the engine to run with radiator cap removed,
until the upper radiator hose becomes hot (thermostat open). With the
engine idling, add coolant to the radiator until the level is up to the
bottom of the filler neck.
Install the radiator cap, making sure the arrows line up with the
Drain the cooling system.
Remove the air cleaner.
Remove exhaust crossover pipe.
Disconnect the surge tank line fitting from the coolant outlet.
Remove the thermostat housing to intake manifold bolts.
Remove the thermostat housing outlet and thermostat
Clean the mating surfaces.
Install the thermostat and housing outlet.
Install the thermostat housing bolts. Tighten the thermostat
housing bolts to 18 ft. lbs. (25 Nm).
Install exhaust crossover pipe.
Connect the surge tank line fitting to the coolant outlet. Tighten
the fittings to 15 ft. lbs. (21 Nm).
TAKE RADIATOR CAP OFF WITH ENGINE COLD AND CHECK WATER ..MAKE SURE RADIATOR NOT BLOCKED,,PLASTIC BAG ETC. THIS SOUNDS LIKE LOW WATER OR RADIATOR ..STOPPED UP INSIDE ..IF YOU HAVE GOOD HEAT IT'S FULL OF WATER. REPLACE T STAT B4 RADIATOR..IT'S CHEAPER. ALSO CHECK FOR RADIATOR COOLING FAN OPPERATION..I,M RULING OUT THE WATER PUMP.
Take a heater hose off and start it up, it should push it out, a lot, like 10psi pressure. Is the cooling system clean? not rusty?Does the heater blow hot air when the engine is hot, if so thats good. when the cooling fan comes on, is the air coming through the radiator hot...it should be. if not, the radiator may be stopped up. if the top and lower hoses are hot, but the air coming through the radiator is cool, the radiator is plugged, and will need to be taken apart and cleaned by a radiator shop, or better yet, replaced.
check coolant first .if all good .hot wire the fan make sure the electric fan motor is operating.if runs when hot wire.replace the relay and coolant temperature sensor.if fan dont run.when hot wire.replace the fan motor.
in my experience it sounds like a head gasket problem it maybe leaking into the cylinders or could be a small leak from one of the hoses I would do a compression test just to make sure and then pressurize the entire system using radiator and coolant tester if pressure holds then its not a leak as far as the fans go just have the car running when it reaches the middle of the temp gauge it should come one if not you may need to run check on temp sensor or fan switch and fans them selves I would follow repair manual troubleshooting section on heating and cooling haynes or chiltons will do.