I want to know how to flush the coolant on my cadillac eldorado convertible 1973?
Indeed, I've noticed that when I drive for a certain time and that the motor has time to warm up, when I stop the engine I hear a boiling noise from the upper hose (the one that starts from the thermostat to go to the top right of the radiator and which spans the air conditioning compressor).
I touched the hose is not under pressure and hard, I think it's a good point. I precise that the water pump and thermostat are new, and joints.
So that is why I was thinking of a purge of refoidissement system as I have done wrong, so I wanted to know the procedure to drain properly.
No overheating symbol lights up on the dashboard.
I also noticed that I my heater does not work (the fan works but no hot air) ... Is there a link between this two facts ?
I await your response eagerly!
ps: I'm French so please no abbreviation or I do not understand: D