Hi,
I seem to have air in my cooling system. I can hear a gurgle sound from the heater core when I accelerate from an idle (don't hear it at idle)
The Engine doesn't overheat, and I can see the T-Stat working on the gauge Warms to 1/2 way up the gauge, and then the gauge falls, showing that it reached it's open temp... The heater core doesn't seem to be leaking, as I feel no wet spots or smell antifreeze.
I did check the overflow, and it was bone dry at cold. Can systems sometimes take on air, and the T-Stat is failing to bleed it properly, or do I have a more serious problem. I hate to think the worst, like an internal leak... Aerostars are SO EASY to work on for major engine work, so I hope that is not the head gasket or something! I see nothing on the ground as far as a coolant leak. This is an 89 with 125K and the 3.0L - Thanks