1999 Celica 5SFE timing belt
My 1999 Celica 5SFE engine calls for timing belt replacement at 6k miles "severe" - what does this mean, and what is the timing belt replacement interval for non-severe service - Thanks

Toyota discontinued the sexy coupe from the 1999 Celica lineup, leaving only the hatchback and the convertible. Due for a redesign the following year, the 1999 Celica saw no additional changes.
Both the hatchback and the convertible came in the GT trim level only. They both came with a 2.2-liter, 135-horsepower engine. Fuel economy was about 22/30 mpg.
Drivers love the look and handling of their 1999 Toyota Celicas, and they appreciate the Toyota-quality engine. Drivers have few complaints, but those that do say the back seat is too small for most passengers, and many wish the car had more power.
My 1999 Celica 5SFE engine calls for timing belt replacement at 6k miles "severe" - what does this mean, and what is the timing belt replacement interval for non-severe service - Thanks
It has suddenly become very difficult to shift my 1999 Celica with 5 speed. It is hard to push the shifter into the gear in all 5 speeds.
I have a 1999 toyota celica GT which has two belts to it, one that runs to the alternator, power steering (i think) and an Idler pulley. I replaced the belt thinking that it was the source of the squeaking, (the belt was starting to crack a bit) But then i realized that there was a second belt that was also squeaking. I have no idea what this belt is for, (water pump?) I reached down and pressed on it and it's loose af. If it helps the squeaking will stop/start when i turn on the AC, TL;DR What is the second belt deeper within my toyota celica gt and can I/ how can I tighten it.
5 speed transmission,brakes and suspension can be up graded but what about the motor....id like a 4 cylinder with the bells and whistles of v6 ....maybe dual over head cam set up...is there a motor swap like pontiac grand am gt motor????
I have a rear window (passenger side) that will roll up only on occasion. It looks challenging to get to the motor. Does anyone have a suggestion and where can I find the motor?
Airbags
Dual front airbags
Audio System
Antenna Type: power · Single disc in-Dash CD · AM/FM radio
Brakes
ABS: 4-wheel
Comfort Features
Shift knob trim: leather · Steering wheel trim: leather
Convenience Features
Multi-function remote: trunk release · Steering wheel: tilt-adjustable
Mirrors
Exterior mirrors: power
Roof
Moonroof: power
Seats
Front seat type: bucket · Upholstery: cloth
Suspension
Front Spring Type: coil springs · Rear Spring Type: coil springs
Windows
Front wipers: intermittent
Airbags
Dual front airbags
Audio System
Antenna Type: power · Single disc in-Dash CD · AM/FM radio
Brakes
ABS: 4-wheel
Comfort Features
Shift knob trim: leather · Steering wheel trim: leather
Convenience Features
Multi-function remote: trunk release · Steering wheel: tilt-adjustable
Mirrors
Exterior mirrors: power
Seats
Front seat type: bucket · Upholstery: leather
Tires and Rims
Wheel type: aluminum alloy
Windows
Front wipers: intermittent