is it hard for a non mechanic person to change the serpentine belts

 

I would say yes. If you've never changed a serpentine belt before, get some help from a buddy who has. You'll learn from his experience and it will be well worth the case of beer or nice dinner you reward him with for helping you do the job right the first time....

 

It depends on what kind of car it is. If you are using belts plural, it's supercharged and it is not an easy job. Get help.

 

It is fairly easy - get a piece of pipe to use as a extension ( 3/4 inch X 24 inches ) for your ratchet handle, for leverage, so that you can loosen the pulley ( push to right of car ). Also ask the auto parts store, where you buy your belt, to print you a belt diagram on how the belt goes on engine. Good luck!

 

+1 What mots said.

On a N/A car it isn't too bad, just be sure you have a picture of the belt routing and tools that give you enough leverage to do it safely.

The S/C cars are more complicated and you will most likely need to unbolt the tensioner from the car to even get the belt into place. Then when you put it back it has torque requirements that need to be met. Get help.