Replacing the timing belt is a complicated procedure that is impossible to describe in this small space. The engine in your Subaru is an INTERFERENCE engine. As such if they belt is installed incorrectly and you start the engine you will do damage. I suggest you purchase Haynes or Chiltons repair manual for your car. It will describe in detail with photos how to replace the cam belt.
The cost to replace valve cover gaskets on a 2001 Subaru Legacy is about $600. If the work is done at home the cost is only $100 to $200.
The 2001 Subaru Legacy has 16 valves.
The 2001 Subaru Legacy is a gas-powered vehicle.
The 2001 Subaru Legacy has a flat 4 engine.
The 2001 Subaru Legacy has a 5-speed manual.
The 2001 Subaru Legacy is 15 ft. 4.4 in. (184.4 in.) long.
The 2001 Subaru Legacy has single overhead cam (SOHC).
The 2001 Subaru Legacy runs on regular unleaded.
The height of the 2001 Subaru Legacy is 4 ft. 7.7 in. (55.7 in.).
The 2001 Subaru Legacy's turning circle is 35.4 ft..
The 2001 Subaru Legacy has 34.2 in. of rear leg room.
The 2001 Subaru Legacy has 51.9 in. of rear hip room.