Coolant bleed valve is located on the driver's side where the radiator hose connects to engine fitting under the MASS airflow sensor. Should be a brass fitting and takes a 7mm nut driver. Low coolant sensor is on the radiator (toward engine) on the passenger side directly below the radiator cap. The sensor is a small black square with one wire plugged into bottom of the unit, held in place by metal retaining clip.
left on brake bleed valves
Cold engine. Remove the radiator cap, top it off, start the engine, add coolant as necessary until all air bubbles stop escaping.
There are no bleed valves on the engine, if that is what you mean.
Is the question how to bleed a Buick 3800 cooling system? I would say open that little petcock by the themostat housing and release all the air as you fill the system with coolant. When coolant comes out instead of air all the air is out.
Service the cooling system. Drain the coolant and replace the thermostat which is more than likely stuck open. Pour in a 50/50 mix of antifreeze and distilled water. Bleed all air from the system.
If it has bleeder valves then use them to bleed the system, if not, jack up the front of the vehicle as high as possible. Remove the radiator cap and start the engine. Add coolant to keep the system full. This will allow air to escape.
Look for schrader valves that are used to bleed air from the system. Located on the highest part of the engine. They look like tire air valves. Start the engine, let it run for 1 minute, and slowly open the schrader valves and let all air escape. If you see none, then you will have to do it another way. Remove the radiator cap, make sure the radiator is full, and start the engine. You will see air escaping from the system as it gets hotter. Keep it topped of and full of coolant. Once you see no more air bubbles escaping put the cap back on and shut the engine down.
not all cars have bleeder valves; it may be located on the intake manifold or the pipe neck that the radiator hose goes into
You should not need to bleed coolant. Ever. If the coolant is filling up on its own the stuff in there is not coolant and you have a big problem.
The Villager engine does not have a coolant bleed valve.
you dont The cooling system has lots of nooks and crannies that trap air, making it difficult to fill the system with coolant. The fill cap and neck are supposed to be at the high point of the system to help air bleed out, but often they aren't. And even if they are, you need all the natural help you can get. So jack up the front of the car, which gets the coolant fill neck as high as possible. Check for air bleeds on the engine. Sometimes you'll see an obvious air bleed, such as a bolt-like item threaded into a hose. If there's an air bleed, open it. If there are several, open them all. If you have access to a factory service manual for your car, check it for a coolant fill procedure. Your owner's manual should list location of bleeder valves. Pour in the required amount of coolant slowly until you see coolant oozing out of the open air bleeds. Then close the bleeds and top off the system with the remaining coolant. If the system has a heater coolant valve, close it by moving the temperature control lever or knob to cold. With the engine running at fast idle and warmed up, have a helper move the lever or knob to hot while you listen at the coolant valve. If after the first rush of coolant you hear a continuous gurgling noise, there's still air in the coolant, and you need to open the bleed valves again. Be prepared to watch the coolant level in the reservoir over the next few weeks.
procedure on how to bleed air out of coolant system on 97 saturn ls