cesc

Right guys, here's the problem: I drained coolant a couple of weeks back and obviously didn't refill it correctly as I now have air trapped in the system.

I have refilled so many times now, and got rid of a lot of air but the car will still overheat after a short while of driving. I have searched here and AZ for instructions on how to refill and done everything , but I can't seem to get rid of all the air.

One problem is that the bleeder valve will not come off and this is making the job more difficult.

Last week a lot of air was burped out and the car ran OK for around 5 or 6 days before coming back. At the weekend I replaced my turbo, and since then the overheating has returned more often. I know it's not the water pump or thermostat, I'm 100% certain it's air trapped in the system.

What else can I do to get the damn air out because I'm close to getting the car running 100% again.

MikTip

1.8T? 3.0? Year?

cesc

Sorry, 1.8T 2002

Avantadrive_Original

I'm not a mechanic, but that doesn't sound right to me. If that was such a prevalent problem, wouldn't it happen to more people more often?

I'd suggest having a mechanic evaluate the problem. Maybe there's a fault somewhere else in the circuit.

Casablanca Avant

the air out of the system.

cesc

I'm pretty certain.

If I leave the cap off the coolant tank, and leave the car to idle for 30 mins, the temp will stay at 90c and the coolant will keep bubbling up to the top and burp out along with air. If I go on a 2 minute drive and sit in traffic the car will creep past 90c and the aux fans will come on.

I'm familiar with the symptoms of water pump failure, and I'm sure it's not that, seeing as it was changed not too long ago.

cesc

I've tried that already, been doing it for like 2-3 hours but it doesn't seem to get rid of it all.

msholmes3580

I just loosened the bleeder valve didn't take it off. Filled the coolant tank to the top of the reservoir and kept it topped off until completed. Turn your heater on full blast start the car and let it start to warm up. As it gets to normal temp start to rev the engine and keep it at about 2k rpms for 30-60sec at a time. This did the trick for me. Otherwise my guess is you have a leak in the system somewhere preventing the air from completley exiting the system. Hopefully not the coolant flange because that was a B1tch to get off.