Ill add a couple of pics to help anybody who is taking this apart for the first time. If you're a pro mechanic you've probably got all kinds of extra tools for those specialy tricky spots.
Here are a couple you'll need for the Celica, mine is a 1994 ST204 with a replaced 5s-fe ( I think it came out of a later model Camary because they shaved a few inches off the bell housing to make the oilpan fit)
The deal is that to get to the upper bolt on the power steering pump, and the three bolts that hold the engine mounting bracket the motor are a Beeatch.
Fist thing you'll wish you had is a nice long skinny socket of some sort, I happened to already have one they sell as a "serpentine belt tool"

These bolts are 14mm , the other wrench you'll be glad to have is a 14mm with a box-end ratchet, one with a 45* angle, the straight one won't help ya much.
they sell nice Durolast ones at Auto Zone in singles so you don't have to buy the whole set.
After the whole thing is apart you've only got these few parts off the car

When I first got mine the guy told me he put a new clutch and a new motor in it, and he replaced the timing belt while he had it out, but it made a funny whiirrrr noise, He said "I think maybe I got the timing belt too tight"
Which I thought was strange, and I
assumed surely he had replaced the water pump while he was at it.. sure.
after two months the whiirr noise turned into the familiar squak squak of a water pump and a little dribble below the motor gave it away for sure.
I got a Gates timing belt kit including both pulleys and new spring, the kit came with two springs, one for the 1.8L and one for the 2.2L
the spring for the 2.2 is a little longer, but when I got it apart I found the spring on there was different from both of them

the one on the top it the brand new one and the one on the bottom is the one I found on it,
notice they are about the same length, yet the bottom one has a different amount of coils, This would most certainly make for a different tension even though the
length is the same, either way, I don't like to play around and so I make sure to replace the belt, idler, tensioner, spring, water pump all together.
and IDK if the dude just found this random spring somewhere or what but it sounds a whole lot better now