We need to know which bearings you speak of, there are many.
where is the thermostat located on a 1989 ford tempo
there are MULTIPLE bearings in a car...wheel bearing, engine bearing, ect. you need to be more specific.
Tempo, maybe Taurus.
You take the old one off and put the new one on without breaking it
This is not an easy job. Best to have it done at your local shop. Labor is about 1 hour per side, bearing cost is around $ 60.00.
NO. As long as you install the correct size plug and gap it properly.
glovebox
Recommended....5W30.
10W30 in the engine.
You don't!
Check out Crutchfield.com
with an electric fuel pump.