Chrysler Repair: 00 2.5 V-6 cooling system, radiator repair shop, head gasket leak

Question
first thanks for all your help so far.  I had the pressure tested in the cooling system and they said it is a little high and may be a small internal leak.  But my question is I don't see any of the coolant moving in the system.  I started the car without the radiator cap and it came up and overflowed the neck and then it just sat there, every once in a while it would make bubbles, i let the car get up to running temp and if the thermostat opened should the water level had gone down some?  The shop told me to put a block sealer in it and I did that and it still seems to build too much pressure, but not I am wondering if there is a clog also the heater doesn't work anymore.  it is a 2000 serbing convt v6 2.5 liter

Answer
Hi Robin,
How did things work out for you with the cooling system?
Earlier, last month, you asked me a question about that problem with your vehicle. Now I need to ask a favor of you. I am competing for the honor of being the "Expert of the Month" for December. You can help me by going the the 'thank/rate' tab below and look for the question that asks if you think I should be so-honored. If you would select the 'yes' option I would be most appreciative. Please do this before 6pm CST today, New Year's Eve when the competition ends. I wish that your Chrysler vehicle is running well and gives you good service in the New Year!
Roland




Hi Robin,
The coolant doesn't circulate noticeably until the engine warms up enough to open the thermostat, so that would explain why you didn't see any movement when you first started it. The problem with watching for coolant movement is that by the time it starts moving noticeably the system may be pressurized.  And once it does start to circulate the level in the system would not drop, but rather rise slightly into the overflow bottle due to the physical expansion of coolant as its temperature rises.
I would check with a ac/radiator repair shop to see if they have an exhaust gas sensor unit so that they could test for exhaust gas in the cooling system. That would be the gold standard test for a head gasket leak. Let me know if you find that to be the case and we can discuss what to do.
On the heater situation, look for the two heater system hoses that flow from the engine compartment into the cabin through the firewall, near the mid-line of the car. Then when the car is up to operating temperature touch those two hoses to see if they feel equally hot. If so then the coolant is circulating through the heater core, if not, then the core is probably plugged up and needs to be reverse flushed. If they are equally hot then if you aren't getting heat it is a problem with the air distribution door inside the cabin that directs the air to either the heater core, the ac expansion core, or a mix, depending upon how you ask on the panel.
Let me know and we'll go from there.
Roland
PS Use the "thank/rate to get back to me with results. There is a space for comments to which I will respond. Also while there, if this answer is helpful, please consider a nomination of me for 'expert of the month'.

PPS The voting for 'expert of the month' ends tomorrow afternoon. If you would be so kind as to find the "nomination?" area of the 'thank/rate' tab and change the 'no' to a 'yes' that would give a vote. Thanks.