Top radiator hose can collapse while the engine is cooling after being up to operating temperature. Heat expands, cold contracts. If your car is not overheating this is nothing to worry about. Of course you could replace the hose if this troubles you.
Under the engine where the lower radiator hose connects.
how to inspect fuel filler hose on 2004 subaru outback
If you have a 2.5 liter engine it is located where the lower radiator hose meets the engine.
Subaru 2.5 thermostat's are bass ackwards...follow the lower radiator hose to the block...there ya go...
inside the thermostat housing where the lower radiator hose connects to the engine block.
They put that darned thing under the engine. It is where the lower radiator hose connects to the engine.
I have a 2002 Subaru Impreza Outback and it have the thermostat on the right bellow the engine. You can fallow the hose from the radiator that goes to the bottom of the engine.
In a 2004 Subaru Outback, the thermostat is located on the bottom of the engine on the driver's side. Remove the screws holding the fitting that the hose (from the bottom of the radiator leading to the engine block) is attached to, remove the fitting, and the thermostat will be underneath.
I think it is at the bottom of the engine where the one radiator hose connects to the engine remove the two bolts that hold the radiator hose pipe inlet in place and you will see the bottom of the thermostat sticking out
Cooling system thermostat is at the bottom of the engine. Look for the lower radiator hose and trace it back to where it attaches to the engine block. Bingo!
next to the upper radiator hose its a plastic Phillips head type screw, look in your owners manual it will tell you about it.
radiator hose needs replacing. use and heat will cause hose to collapse when worn out