Heater hose circut

If your 1998 Cutlass is overheating and the heater is blowing out cold air, and you are also noticing that coolant is leaking out, there are a few possible causes. Here are some things to check:

Check for a coolant leak: Start by checking the engine and radiator for any visible signs of a coolant leak. It's possible that a hose or other part of the cooling system may be damaged or loose, causing coolant to leak out.

Check the radiator: If the radiator is not working properly, it can cause the engine to overheat. Check to make sure the radiator is not clogged or damaged.

Check the water pump: The water pump circulates the coolant through the engine. If it's not working properly, coolant may not be flowing through the system correctly, causing the engine to overheat.

Check the cooling fan: The cooling fan helps to keep the engine cool by pulling air through the radiator. If it's not working properly, the engine may overheat.

Check the thermostat: Even though you recently replaced the thermostat, it's possible that it's not working correctly. A faulty thermostat can cause the engine to overheat.

It's important to address any issues with the cooling system as soon as possible, as overheating can cause serious damage to the engine. If you are not comfortable diagnosing and repairing the issue yourself, it's recommended to take your car to a qualified mechanic.

You m?y have a blown head gasket letting exaust into the cooling system. The pump cannot push exaust. Try a liquid head gasket sealer before replacing gasket. But first open the radiator cap and start the engine. Watch for the coolant to bubble. Top engine and add coolant or water. Some times after doing work on a cooling system you may get air in the system and need to *burp* the systems.

when replacing coolant, did you bleed the air from system! you can remove radiator or overflow cap when cold. start vehicle and let it run until thermostat opens,when all air is out hoses should get hot. but before starting, turn heater on to high setting, if you vehicle does not have a air bleeder on it. do as above. just be sure radiator is full of coolant. after hoses get hot, turn off heater, then put cap back on radiator or overflow. good-day! the first thing to do is to check for a stuck closed thermostat. do this first ok!

your car is severely overheating. take it to a repair shop and have it checked. it sounds like you are low on coolant, if you only get cold air out of vents, it usually means you you have little to no coolant in the system. you could have a lot of air in the system also. try bleeding the coolant system.

Did you bleed the air out of the cooling system. Might be that. Open one of the heater hoses to bleed. Also check thermostat.

first find out where the coolant is going, do a system pressure test

Check you have coolant flow to the heater core - feel the inlet and outlet coolant hose as near as possible to the heater core- they should be both be hot and approx equal in temperature.
If the outlet hose is noticably colder you may have a blocked heater core ( a reverse flush with water from garden hose may fix it).
Check the cooling system has been properly filled, with the heater coolant valve open, bleeding off any airlocks as required.
Check any cold/hot air re-direction vane within the cab heater air ducting is operating properly (not seized or stuck).

squeeze the hoses to get any air bubbles out and refill coolant as necesary. are you sure you put thermostat in the right way? may be backwards. also may be your sensor.

U'll need to bleed the system.

Sounds like a circulation problem could be the thermostat or a water pump issue, Ive had a similar problem on my Ford Taruas a couple of years ago. I replaced the thermostat and the problem was still there,so I replaced my water pump later. During my inspection of the old pump after removal I had noticed a few of the fins on the internal part of the pump were missing. This probably didnt allow the pump to circulate the coolant fast enough through the system. After replacing the pump and thermostat my problem went away, I hope this helps.

George.