I had this problem with my 1992 Nissan 240 sx almost three years ago and it cost about $1,000.00 then I'm pretty sure it should be about the same, maybe a few hundred more with the time difference.
it has a chain not a belt
chain
on the dampener pulley
15btdc
ask the mechanic from the Nissan company
it could be your timing is off
20 degrees btdc with tps un plugged
i would like to know as well
loosen the manual tensioners and the alt bracket.
Get a manual on your car, It will have pictures and everything,.
Nissan 240sx
The Nissan 240SX was brought to America in 1989.