Does 3.4L V-6 have timing gears, or chain?
 

Does the 2000 4Runner’s 3.4L V-6 have timing gears, like FZJ80’s 4.5L inline 6, or does it have timing chain or belt?

If chain or belt, what is interval to replace it?

belt and im pretty sure its 90k

he's right

when i worked in the repair industry we always said do it at 80k on everything just to be safe.....

and the 3.4l toyota v6 has a timing belt

How To Tell
 

Usually the way to tell if you have a timing belt or a timing chain is by the cover. If it has a chain it has a metal cover and if it has a belt it will have a plastic cover.

The 3.4l is a non interfearence type engine. You dont really HAVE to change the belt. If it breaks, just center the cams and crank with a new belt.

Of course being stuck on the side of the road because you were too cheap to change out a $30 belt would suck!