The little problems seem to still persist for my 2001 Outback..when leaving the corner the "gergeling" sound does not want to disappear ...I had assurances from the subi mechanic this morning that all was taken care of..only cool air from the heater at the moment..I will try the search to see what has been said in the past..any info would be appreciated

Park car with nose up a slight incline. Let engine cool for at least four hours. Remove radiator cap. Start engine and let it run until the radiator fan starts running. Top of level in rad filler neck. Install cap - preferably a brand new genuine part.

 

Be aware that some coolant will spill over, so a cloth wrapped around the filler neck is a good thing. Also, as the engine heats up and the thermostat begins to open, you should have bubbles leaving via the filler neck.

 

Drive for a few days, report back here

also take out the bleed screw that is on the other side of the radiator from the cap if you have one. And don't over-tighten or it will break.

 

I still have just the slightest amount of air I'm trying to get out after I replaced a radiator. The temp needle doesn't move and heat works, but there's just a bit of gurgling.

 

Getting all the air out of the system is apparantly even more of a pain in the rump roast on turbo cars.

Morning has arrived and I will get immediately to it..

Park car with nose up a slight incline. Let engine cool for at least four hours. Remove radiator cap. Start engine and let it run until the radiator fan starts running. Top of level in rad filler neck. Install cap - preferably a brand new genuine part.

 

Be aware that some coolant will spill over, so a cloth wrapped around the filler neck is a good thing. Also, as the engine heats up and the thermostat begins to open, you should have bubbles leaving via the filler neck.

 

Drive for a few days, report back here

I have a older VW van and the process of filling is also very time consuming...

also take out the bleed screw that is on the other side of the radiator from the cap if you have one. And don't over-tighten or it will break.

 

I still have just the slightest amount of air I'm trying to get out after I replaced a radiator. The temp needle doesn't move and heat works, but there's just a bit of gurgling.

 

Getting all the air out of the system is apparantly even more of a pain in the rump roast on turbo cars.

Setright..I have just tried as you recommended with no success...I did set the car on an incline and only a few bubbles came out when squeezing the heater hoses a couple of times...very shortly after that it started to over flow , there was also no change to the over flow situation even when reving up the motor and of course at this point the car had to be turned off...I am waiting for a cool down before adding anything at this point with the car still elevated

Park car with nose up a slight incline. Let engine cool for at least four hours. Remove radiator cap. Start engine and let it run until the radiator fan starts running. Top of level in rad filler neck. Install cap - preferably a brand new genuine part.

 

Be aware that some coolant will spill over, so a cloth wrapped around the filler neck is a good thing. Also, as the engine heats up and the thermostat begins to open, you should have bubbles leaving via the filler neck.

 

Drive for a few days, report back here

The other thing that I do when following this procedure is to keep the overflow bottle completely filled (yes - past the "full hot" line) with coolant while I'm "burping" the system like this. When the engine cools, the coolant shrinks, creating a partial vacuum in the system which will suck back some of the coolant from the overflow.

I have just added that idea into the procedure to be on the safe side ..I believe I have now been successful in correcting this minor problem..I have been driving around town, then letting it cool, then bringing the car up to operating temp once again,..not even once could I hear the gergeling plus plenty of heat now...

The other thing that I do when following this procedure is to keep the overflow bottle completely filled (yes - past the "full hot" line) with coolant while I'm "burping" the system like this. When the engine cools, the coolant shrinks, creating a partial vacuum in the system which will suck back some of the coolant from the overflow.

Peter, the large amount of overflow is caused by a big bubble somewhere expanding quickly and backing fluid out. It's best let it flow over and wait til the fans come on because that way you can be sure the thermostat has openede fully and the circulation will release the air traps.

 

Still, seems like a quick burp worked, so you're ok

I will certainly record all this practical info for the next time I have to deal with the cooling system.. Thanks again

Peter, the large amount of overflow is caused by a big bubble somewhere expanding quickly and backing fluid out. It's best let it flow over and wait til the fans come on because that way you can be sure the thermostat has openede fully and the circulation will release the air traps.

 

Still, seems like a quick burp worked, so you're ok