it has a chain not a belt
chain
15btdc
on the dampener pulley
ask the mechanic from the Nissan company
it could be your timing is off
20 degrees btdc with tps un plugged
loosen the manual tensioners and the alt bracket.
i would like to know as well
Get a manual on your car, It will have pictures and everything,.
The Nissan 240SX was brought to America in 1989.
Nissan 240sx