Typically this is the heater core bypass tube.
Takes warmer block coolant to heater core for faster cabin warm up.
If its a metal to metal sound its probably a wheel bearing
water pump hose extension
THERE IS NO HOSE, THE WATER PUMP IS FED BY A METAL COOLANT PIPE LOCATED UNDERNEATH THE INTAKE MANIFOLD. THE LOWER RADIATOR HOSE CONNECTS TO THE PIPE.
ON the coolant resevoir, look for the hose that runs to a tubular metal connection, it is a smaller hose at the top, make sure coolant flows out when the car is started, willing to bet it is blocked from the point where it connects to the heater core unit. I had the same problem. car works fine now
Follow the 2 small metal lines from the side of the radiator to the transmission
There is a brown sensor that screws into a metal pipe on the right hand side of engine bay just behind the radiator, there is a black hose from the radiator that connects to the metal pipe then you will see the sesor screwed in.
The coolant bleeder valve should be on the front passenger side of the engine. It will be on one of the metal hoses. The bleeder valve on the 3400 V6 engine is located on a black stem where the water pump connects to the engine block.
No, not for the hose but, I have seen the metal bypass tube that the hose connects to, rust out and cause a coolant leak out the back of the engine. The intake manifold would have to be removed to replace that metal tube.
Transfer case is shot.
Yes, but it's not in the normal location. It's actually below your engines exhaust manifold. If you look under the car you'll notice that the lower coolant hose connects to a metal runner that runs under the oil pan and back up towards the exhaust manifold. Your thermostat is contained where this metal runner connects to the water pump.
The metal covers are not part of the boot. The boot should have a raised lip that will allow you to work it off of the spark plug. Twist and turn it until it pops off.
Nuts and bolts and metal