/diy/ - Do It Yourself

/o/ isn't even worth asking

So one of my belts is making a god awful sound upon starting the car. It's almost 30 years old, and I don't know the last time any belts were changed. I figure I my as well just change them all.

My question is regarding the timing belt. I checked a few videos and guides, some make it look easy, some make it look hard. Scotty Kilmer makes it look super easy.

Before I remove the belt, loosen the tensioner, and replace the pulleys, Scott says to use a marker, and just draw a line to show where everything meets up, then replace belt, and check everything lines up still.

Every other guide I look at says to make pistons sit at TDC, drain fluids, among other things.

Is replacing the belt as easy as just making sure not to move anything? I'm a pretty handy guy, but don't want to fuck up my only mode of transport.

All advice appreciated.

Pic unrelated, went full /diy/ in a department store.