Need a picture of cooling sys showing thermostat on a 1992 legacy

It is on the end of the top radiator hose w/2 screws holding it to the engine BUT you must first remove the throttle body above it so you can access it. I did the job it took about 1 hour total

you now need to bleed the cooling sys, or air bubbles will remain in sys keeping fluid from moving properly through out sys. More coolant will be needed as you perfrom the bleeding process.

We just did the same car with the same prob. The block was cracked and was pressurizing the cooling system causing the thermostat not to open. Remove your thermostat and run the car if it doesn't overheat you need a motor. Ours didn't show any hydrocarbons in the coolant either, so try the simple

The fan switch will be near the thermostat housing,you'll see one or more sensors there,this picture will help you get the correct one.

1. Thermostat on this particularcar is on the right-side of the inlet manifold.
2. Allow the engine to cool down for about 3-hours before this removal is attempted.
3. Place a conatiner under the radiator.
4.Drain the coolant into the container by opening the radiator drain valve( which is under the radiator).
5.Disconnect the radiator hose clamp.
6.Pull the upper radiator hose off the thermostat housing cover.
7 Remove the thermostat bolts.
8. Carefully note the position of the old thermostat in its seating place. (arrow is marked on its seating place)
9.Take out the old thermostat.
10.Break off the old gasket seal using a knife or similar object.
11. Reverse this procedure for installation .(rememeber to put in new gasket on the thermostat seating place).

Follow the top rad hose to the engine, it is the where the top hose clips onto the block, that is the thermostat housing, stat inside.

The thermostat is located under the engine Follow the lower hose from where it attaches to the engine. Be careful with the bolts, use penetrating oil, you do not want to break one. Try to use a Subaru thermostat and gasket-- expensive, but cheaper than an overheated engine, most places do not stock the required thermostat, being an oddball temperatiue (167F), putting in a "regular 195F" thermostat WILL cook your engine. The gasket is really an O-ring affair-- it works nicely. Try not to re-use the old O ring gasket.

the snsr is located on the right side of trans and can be viewed from the passenger side of vehicle looking down at trans from under the hood.

i cant give you a diagram but can tell you how to locate it easy just locate your radiator and follow the top big black radiator hose from the radiator to where it goes on the motor it hooks onto something metal there with 2 bolts unbolt that and there will be your thermostat...let me know any questions you might have..

Thanks,
Steve

Thermostat is in the cooling water output from engine hose.See figure