Rev up the engine again and loosen the air bleeding valves until there is only flowing coolant from them.
Bleed radiator cap off.
Start the car with the radiator cap off.
When elevating your vehicle make sure that the radiator cap or reservoir tank cap is loose to help speed the process start the car with the radiator cap off.
You can also jack your car to bleed the air from the cooling system.
Remove the radiator cap.
Have refilled the radiator with air removal via the air bleed valve have replaced the thermostat and the radiator cap but the unusual problem remains that engine temp takes a long time to get to the mid normal then at highway speeds the temp actually begins to drop towards the quarter mark.
So i began to experience my car passing the red line for the thermostat gauge in my 1999 jeep grand cherokee laredo.
Let your engine idle again and recheck the coolant level and lower the front of your car.
Keep the radiator cap loose to help the air move out during this process.
Set the heater to max.
This will allow you to handle the radiators without burning yourself.
Add coolant to the reservoir container to bring the level up to the cold mark as well.
Adjust reservoir coolant level as needed and replace cap.
Fill the radiator with a 1 1 ratio mixture of distilled water and antifreeze up to the bottom of the radiator neck.
Good thing there s a quick fix.
Put your radiator cap back.
At this point you should repeat these steps until you get heat inside the car and your coolant temperature reaches 90c.
Add coolant to reservoir if needed.
Don t fret this is a common problem.
Bleed a radiator your heat is cranked up but one of your radiators is still ice cold.
Add coolant to reservoir if needed to half full level.
Bleed the radiator now that you ve identified which radiators need bleeding you can switch off your central heating.
Place cold hot control on hot.
Leave the radiator cap off and start the engine.
Mix only distilled water with the antifreeze.
This puts your radiator higher than the rest of the cooling system and helps force the air pockets closed.
When bubbles disappear from reservoir turn off vehicle.
Leave cap off of reservoir.
Start engine and let it idle.
Now while there are a few issues on why.
One of the easiest ways to bleed your car s radiator is to simply remove the radiator cap and then start your engine.
