Park the vehicle uphill on an incline or jack the front end up. Remove the radiator cap and make sure it is full of coolant. Start the engine and run until no more air bubbles are escaping. Be sure and keep it topped off.
The cooling system is bled using the bleeder screw found on the thermostat housing. To find the thermostat housing on a 1998 Honda Civic follow the lower radiator hose to its outlet. While the cooling system is running loosen the bleed valve. When bubbles stop coming out the system has been bled.
To bleed the cooling system on a 1998 Fiat Bravo 1.4 12V, first ensure the engine is cool and remove the radiator cap. Start the engine and let it reach operating temperature, allowing the thermostat to open. Then, with the heater set to maximum, open the bleed valve (if equipped) or the highest point in the cooling system to release trapped air until coolant flows without bubbles. Finally, top off the coolant level and replace the cap.
The bleeder valve for a 1998 Nissan Quest is typically located on the engine's cooling system, specifically on the thermostat housing or near the upper radiator hose. To bleed the cooling system, you may need to remove a plastic cover to access the valve. It's essential to ensure the engine is cool before attempting to bleed the system and to follow proper safety procedures. Always refer to the vehicle's service manual for detailed instructions specific to your model.
Is there a air bleed screw along the top hose? Alot of vehicles will have one. It usually has a place for the square shaped sockets. Undo this screw and fill until fluid comes out of this bleed hole. This pushes air out of the highest point of the system.
If you are talking about a 1998-2005 Passat there is a bleed hole in the cooling system for this purpose. The heater coolant lines pass through the second firewall remove the clamps on the lines and pull them toward the front of the car about an inch. One of the lines has a little hole for bleeding the system.
It everything was done correctly plus the controls are working then you will have an air pocket in the cooling system and you must bleed the system out to remove it..........
It is best to have it done professionally as they clean the cooling system as well as back flush it.
It is important to have a diagram of the area of the car that is being worked upon. The cooling system diagram for a 1998 Dodge Dakota is found in its maintenance manual.
More than likely the cooling system has an air bubble in the heater core. check to see if the radiator is topped off with anti freeze, and look in your owners manual for cooling system bleed procedure. sometimes, even if the radiator is full, there will be an area that will not bleed the air, so the engineers designed in a bleed port which is sometimes located on the thermostat housing or in a heater hose. hope this helps
Maybe your cooling/heat system is all plugged up with radiator deposits. You could try flushing the radiator and see if it helps.
You have to drain the system via the bleed screws on the calipers. Then, after refilling the system with fresh fluid, you need to bleed the system to remove any air.
low engine coolant level, your heater core is at the very top, so if its not full to the very top it wont work. add coolant and bleed system.