I have a 2000 Gs-R. Pretty much stock except I/H/E and S2 IM.

My timing belt is hitting the timing belt cover. It makes a "slapping" noise and it's loud. It happened about a month ago and fixed it.

What could be causing it do this AGAIN?? Should I get a new T-belt?

 

how many miles on the car?, if there is a lot, change the timing belt and the tensioner

 

The tensioner bolt is probably loose.

 

I third that, tensioner.

 

Did you diy, meaning change the timing belt.....or shop. well check to see if your missing the spacers that spaces the timing belt pulley from the block and the other between the timing pulley and the crank pulley.......something like this......[block]IOIQ


[block] = your block
I = spacer
O = timing pulley
Q = crank pulley