1995 Cutlass Supreem keeps oveheating

Check for a blown head gasket? This often is the cause of a problem such as this?

if its overheated it could of blown the head gasket. or warped the head. take the plugs out and see if it looks like its been steam cleaned in one or more of the cylinders.

If your car is overheating when you drive it,but you have replaced and made sure the radiator fan motor is working and coming on,you have flushed the system and replaced all your cooling components,then you may have a blown head gasket.Check for a milky white look to your oil dipstick.If so,you have a blown head gasket.or you might also have an air pocket in your cooling system that you need to bleed out.Good luck.

YOU NEED TO FLUSH THE RADIATOR AND CYLINDER BLOCK AND HEATER CORE.CHECK ENGINE OIL IN CRANK CASE IF LOOKS LIKE MILK SHAKE YOU HAVE A BLOWN HEAD GASKET.WHICH WILL CAUSE ENGINE TO OVER HEAT.

A blown head gasket is usually easy to confirm. The head gasket prevents the engine coolant and oil from mixing under the head. If you have a blown head gasket, you should be able to see bubbles of water/cooland on the dip stick when you check your oil.

I do agree that with your heater taking a while to get warm, it probably has some build-up in the system that needs to be flushed out, before it causes other issues.

Best of luck!

is the fan working? (radiator fan not heater fan)

Drain and flush the cooling system...more than once if needed.
Replace the thermostat with a 180 degree...the OE stat. is 200 degree.
Clean the outside of the radiator and a/c condensor, make sure there is no debris in the cooling fins and they flow air freely.
Fill system with 50/50 mixture.
If it still attempts to overheat...check your cat convertor, it's clogged and creating too much back-pressure
Hope this helps...

could be a cracked block engine.what i would do is put a tarp or old sheet down park vehicle on it and wait then when you check you can look on old sheet to see where its leaking and it will give you an idea where to look for the leek if it was head gasket youd have sludgey looking whitesh foam in the oil

CHECK H2O PUMP AND SEE IF IT IS NOISY
CHECK TOP & BOTTOM RADIATOR HOSES
OPEN RADIATOR & CK FLUID LEVEL ANTIFREEZE - GREEN NOW BROWN

ANY DOUBTS - FLUSH THE RADIATOR REFILL ANTIFREEZE..

NOW IF ALL THAT LOOKS GOOD..
YOU MAY HAVE A STUCK THERMOSTAT
OR AT WORST CLOGGED RADIATOR..

NOW THE WORST.. YOU MAY HAVE A CRACKED HEAD SO PULL OUT THE OIL DIP STICK AND SEE IF YOU HAVE H2O IN THE OIL...

IF SO... YOU ARE IN BIGGER TROUBLE HOWEVER YOU MAY SIMPLY A HAVE A BLOWN HEAD GASKET.. OK THATS WHAT YOU NEED TO DO FOR A .
START. GOOD LUCK!

did you flush the radiator and change the uper hose? If you have changed the water pump and sencers have them checked they may be factory defected.