[CylXP]

Ok, thank you for the advice!
I'm waiting my new radiator drain plug, and I'll do that!

[CylXP]

Hello everyone !

So, here are some news :

I received my new radiator drain plug and a new cap for the reserve tank, so the leak issue is now solved.

So, I tried to rinsed the system with demineralized water, here is how I did :
I've opened the bleeder valve, and a I filled the tank at the maximum until no more air gone out from the bleeder during 2 minutes or so.
I closed the bleeder, and started the engine. I let the engine warm up normally, and I opened the bleeder : a very small amount of air gone out from the bleeder this time.
Then, when the engine was at its normal operating temperature (when thermostat opens), I opened the bleeder just to check, and here is my problem : a very big amount of air gone out from the bleeder ! Indeed, I've opened the bleeder for at least 2 minutes and air was still going out from the bleeder. Because the level in the tank was going down, I stopped the engine.

Is that normal?

Thank you in advance for your help!

[94Beater]

I'm no expert, as today was the first time I have done the bleeding procedure, but I don't think you want to open it up when hot. That could likely be steam boiling out of the bleeder. My dad was telling me to let it get hot with it open, but I insisted you shouldn't do that. I could be wrong, though.

[cdmccul]

The coolant bleed on the first generation cars is not a running bleed. With the system cold, attach a clear hose to the bleed nipple, and open the bleed valve. Put the other end of the hose in a recovery jug on the ground. Add coolant to the recovery tank while watching the clear hose... Keep adding coolant till you see no more air come out of the hose. The liquid recovered from the hose in the recovery jug on the ground can be recycled up into the tank when the jug is full, and you just keep pouring the same coolant back into the engine.

When no more air is seen coming out of the bleed nipple through the clear hose, you're done! Just close the bleeder, remove the hose, fill the recovery tank, put the cap on, and drive.

[CylXP]

Thank you for your replies guys.

This is exactly what I did!
But, just to check, I've tried to open the bleeder when the engine was at its normal operating temperature, and I've found that air was coming out from the bleeder. So, I've let the bleeder opened during 2 minutes, and air was still going out from the bleeder. I had to stop because the tank was almost empty.
Do you think that it is normal? Because when engine was cold, no air was coming out from the bleeder.

[94Beater]

If you open the system when it is hot, the coolant is going to boil, and that vapor is likely the air you are talking about.

When the engine is cold, just fill it up full, and if no coolant comes out of the bleeder when you open it, just keep on squeezing the upper radiator hose until you get a steady stream of coolant, then close it up. I had to squeeze mine for quite some time, but finally a stream of coolant came flowing out. Heat is blowing good, and engine is cooling properly.