Blown head gasket?
Air trapped in the system (hasn't bled out yet)?
Wrong cap?
a 2002 Alero could have several problems causing the overheating. Thermostat, water pump, or clogged radiator issues are the most common causes of overheating.
I have a 2000 Eddie and just had the same problem, it ended up that the thermostat was sticking and the radiator had some build up in it. That in turn led to the water pump going down and stated leaking. First thing I would do is check the thermostat and hope that the reason because it's only a $10 fix. If that's not the problem I would flush the radiator and lastly, look at the water pump if the other two didn't work. I just shelled out $891 to have all this replaced.
By itself, the thermostat would have to be stuck closed causing a severe overheat condition to cause a loss of power.
Hey Willie==If it comes out the cap and not the overflow jug, the cap is faulty plus what is causing it to get hot. 'Check the fans for proper operation. If it isn't smoking white smoke, it probably isn't the head gaskets. A stuck thermostat will also cause it ot overheat. If all else fails, take it to a radiator shop and have the radiator flow tested. GoodluckJoe
Hopefully, it's the thermostat... but, if the engine has seriously overheated it could be a damaged head gasket caused by a warped head. Engine heads will warp slightly when the engine overheats, then there is insufficient pressure on the head gasket and the gasket will leak.
Without make model year & engine size.... Head gasket, waterpump, hoses, radiator, cooling fans not coming on belt to waterpump, thermostat, etc...
You have not bleed the air out of the system after you installed the t-stat, causing the heater not to work and the engine to overheat. Use a coolant filler that screws into the radiator and get the air out
Your radiator might have a small pinhole in it, causing it to not build up pressure.
Oil/antifreeze mix is usually caused by head gasket leaks or valve cover gasket leaks.
You could have a bad water pump causing no coolant flow, inoperable radiator fans, a coolant leak,............
The coolant is not flowing, causing no heat. Look at the antifreeze coming out to see it there are bubbles in it. If there are bubbles then you have a blown head gasket. If not, then you have either a bad thermostat of bad water pump.
A radiator cap can not only be hot, but it is holding in pressure. When the cap comes off under pressure, hot antifreeze will spray out, possibly causing injury.
The radiator may need to be rodded out. The thermostat could be stuck shut. The sensor for the radiator fan may be bad. The radiator fan itself could be bad.
A small radiator leak can cause antifreeze to leak on your 1998 Chevy Lumina when there are not any spots on the ground. A pinhole in a hose can also cause this.
I'm assuming you have the correct thermostat, but you should always double check. Some other things that may or may not be causing the problem could be: Your radiatior is clogged and the antifreeze isn't circulating properly. You may not have enough antifreeze in your radiator. You may not be getting enough airflow through your grille to the radiator. Your electric cooling fans may not be working properly. Your radiator cap isn't maintaining proper pressure. Your ignition timing could be off, but it believe it's computer controlled on your vehicle, so that shouldn't be it. Hope this helps! Good luck, and don't get frusterated, you'll be able to find it.
You could have a stuck thermostat or your cooling fans aren't working.
first , the thermostat could be stuck. try replacing it. if your radiator OS losing coolant, there may be a leak in the radiator causing it to overheat, or the water pump could be bad. thermostat is the likely cause if it is not losing water.