gates timing belts are crap. Do not use them...
I installed one with the new idler/tensioner bearing's.
after about a week i had this really weird noise at idle coming from the front end.
after 6 months it was getting really annoying so i
did the screw driver trick, and the most noise was coming from the cas.
chucked a spare cas on and no change, so i removed the timing cover and instead of the blue gates belt i found a black gates belt. i was puzzled by this so i stripped the balancer, lower cover, etc off and found all the blue crap from the belt was now coating my new idler and tensioner pulley.
the coating that they put on the outside of there belts is useless.
removed both pulleys and hit them with the wire wheel on the cordless, and came up good as new.
replaced with a genuine nissan belt and havent heard a single noise since.
So the moral of the story is,
stick with genuine.
Cheers