Replace the bleeder valve. On vehicles equipped with a bleeder
valve it is imperative you use the bleeder to remove trapped air.
No other procedure will remove all the trapped air. On cars without
a bleeder, you simply remove the radiator cap and start the engine.
Watch until all air bubbles have escaped. This will not be
sufficient on your car. Failure to remove all trapped air, will
lead to a hot spot and possible engine damage.