Hi everyone. I hope someone can help me out. I have a circulation hose that is leaking at least I think that is what it is on my 2000 LS 2wd 4.3. I have done research on the net for pictures or any information with no luck. I have to do this repair myself. The thermostat is working, no pressure in the radiator hoses or heater hoses. It does not overheat as long as I keep coolant levels normal. The hose has metal fitting with about an inch nut on each end. I goes from the left back side of the waterpump to the lower left side of the block. It is hard to get to. Does anyone know what this hose is? Any help is appreciated.
Thanks,
Brett

 

Is this the hose you're talking about? If so it's called the thermostat bypass hose