Coolant leaking?

The coolant leak is a must and so it the thermostat if you are having such heating and leaking problems. The belt I can't say need to see it and as for flushing also depends I need to see what the coolant that came out of it looks like. This guide can help us fix it

https://www.2carpros.com/articles/car-is-leaking-coolant

Please run down this guide and report back.

You will have to get a coolant system pressure test done to locate any external leaks and a head check done, this is a simple chemical test to check for co in the cooling system gasses, if this is the case, you will have a head problem to sort out.

Did they check the water pump. Sometimes the can leak and not leak depending on the temp or how long its been running. I would start there.

If its leaking it'll be very obvious-where is it leaking at?

There's three tests that can be performed to find the source of the leak. The first is a simple pressure test. Many auto parts stores borrow or rent tools and they will have a pressure tester with a hand pump and pressure gauge. Pump the system up to 15 psi, then you can search for an external leak.

Leaking head gaskets are very common. When coolant can leak into the combustion chamber and go out through the exhaust, combustion gases can also leak into the cooling system. Most mechanics have a glass cylinder with two chambers partially filled with a special blue liquid. Air is drawn from the radiator through the liquid. If it turns bright yellow, the head gaskets are leaking, or more rarely, a head is cracked. Typically you will also see white smoke coming from the tail pipe and the exhaust will have a sweet smell.

For slower leaks, especially when the leaking coolant evaporates and can't be easily seen, you can add a small bottle of dye to the cooling system. After driving for a few hours to a few days, you search with a black light around the engine and inside the tail pipe. The dye will make a bright yellow stain that you can follow to the source of the leak. A gallon per week would probably fall into this category since the coolant isn't running out in a matter of minutes.

If your car still has the red Dex-Cool, (Dex-Mud) antifreeze, corrosion is a common problem. In particular, the heater core in the dashboard should be checked. There will be about a 4" long rubber hose hanging down from the passenger side of the firewall under the hood. That is the drain for the water that normally condenses when the air conditioner is running. If the heater core is leaking, coolant will also drip into that drain pan and run out the tube. The end that is hanging down will be molded into a slit, not a normal round hose, so you'll have to crawl underneath and shine the black light up into it if you're using the dye method.

Good afternoon.

You will need to do a pressure test to find the source of the leak. There are many places that it can leak and the pressure test will show where the leak is located.

Roy

https://www.2carpros.com/articles/radiator-pressure-test

Good afternoon,

Did you perform a pressure test? There are many places that can be causing that leak. The lower hose, water pump, intake manifold gasket, which is common, or the timing cover. The pressure test will pinpoint the source of the leak.

https://www.2carpros.com/articles/radiator-pressure-test

Roy

Sounds like a lower intake gasket or a water pump. Have it pressure checked and see where the leak is at