Hi John 999. You are correct, Glass did indeed have a heater problem most likely caused by corrosion inside the cooling system, as well as some amount of "stop leak" may have been added through the years. Its common to see heater cores get restricted in these cases and while back flushing the core often restores coolant flow and interior heat, it can also allow the already present heater core leaks (that are slowed significantly by the corrosion and stop leak) to become larger and now the core has to be replaced. The facts are, the core likely should have been replaced with the initial report of trouble, but the shop/tech is the bad guy if that repair is reccomended first the customer declines and then someone else manages to flush the core successfully. Its really troubling how many times I have seen a customer blame a tech for a problem on the customers car, and hear try and accuse the shop/tech of breaking the car just to get more work. What has been worse is when the shop simply fixes the subsequent issue, "under warranty" when they actually know they were not at fault which really does two things. One it convinces the consumer that the shop was indeed at fault, and it rewards the consumer for NOT being objective and fair. Notice that I changed the word customer to consumer for that last sentence. Customers ensure that a business will survive to continue to serve them and everyone else. Consumers can eat the profits of a business and in the process of taking care of them the business can actually suffer losses that ultimately cause it to fail. Doing "free to me" work makes the consumer happy, and convinces them that was the right way to deal with the situation. Then one day the see "ol Joe" has gone out of business and they wonder why it happened because he was such a good guy.

As the engine cools after shut-down, the coolant contracts. Normally, reserve fluid is drawn back into the system from the overflow bottle, and yes, a slight vacuum is formed to do this. If the return path has too much restriction, the vacuum increases and can collaspe a hose. However, a proper hose should have enough body stiffness to withstand the ususal amount of vacuum and should be able to draw fluid back into the system. Deteriorated hoses may collaspe. Another cause is that the hose was not the proper one, or good one, in the first place and did not have body stiffeners within it. Sometimes, the bottom radiator hose may have a spring-like coil of wire in its body; The upper one may, or may not have such stiffeners. Places where restrictions may occur in the return line (from the overflow bottle) o Wrong radiator cap, or one with a stuck or plugged valve. o Collasping hose from the radiator to the overflow bottle. o Gunk in the bottom of the overflow bottle getting sucked over the return opening. o Interference on the hose going from the coolant system to the overflow bottle, like a mounting clamp pinching this hose. I presume this is a new problem that has developed lately, therefore its a good bet that both (upper and lower) radiator hoses should be relaced. And while these are off, its a good idea to change the thermostat too.

the reason i say airflow is IF the OP's lives in an area like i do. we stay in teh 70-90% RH range most of the time and even a minor cold air leak WILL cause condensation on this level. my unit for the back of my house has done it in teh past. i noticed the backup drain had water coming out, so i figured the main was clogged. go in teh attic and see it is the plenum sweating and pouring water off it. i found the leak, a strap had come undone and allowed it shift a little. resecured the strap, sealed the leak and no more water. of course, if you live in a normal area that humidity is not so high this may not apply. regardless, those gaps should be SEALED.

I also am very happy to find websites like this. Never had a problem until 64 and doctor thought I needed some estrogen for "dryness" issues. I was on Estriol compounded as it is not sold in U.S. but is in other countries. 2 1/2 months had to stop using as it made me ill. I realized later it was ordered too strong . My Gyn was also an Ob and specialized in adolescent pregnancy. What was I thinking !! Started very disturbing symptoms about 2 months after the end of Estriol. Profuse sweating, followed by chills, rapid increase in heart rate (over 130), dizziness and nausea in the middle of the night, night after night. I was so exhausted I ended up passing out and in the hospital. First Cardiologist, then Endocrinologist and finally going next week to GYN specialist. Of course went through the "you must be having anxiety" talk. Did I mention I am a retired Major in the Army Nurse Corps and psychiatric trained Reg. Nurse. I only mention this as I was almost starting to believe them. Thank GOD, and I mean this, I started to do my own research. Hot Flashes and Night Sweats with severe vasomotor reaction, very common. Well I say with all my heart thank you ladies for sharing on sites like these. It has been 81/2 months and they are definitely less. I am using magnesium, Vit. E, watching sugar intake, doing deep breathing , trying to control stress and thinking about Remifemin. Good luck to everyone .