Where is the engine thermostat located on a 1996 Toyota Avalon 6 cylinder engine?

If you follow the lower radiator hose, it connects to a pipe on the engine block. Follow that pipe and it goes towards the rear of the motor (about 8 inches) and turns left into the block. There are bolts there that need to be removed that hold the housing in. The thermostat is there. Hard to get to....good luck.