Chain
Timing chain
yes,
Chain.
Yes 4 cylinder have chain and 6 have belts.
The 2.4 liter 4 cylinder in a 1997 Nissan Pickup has a timing CHAIN
Chain
Chain
Outside the engine
Timing chain
The 2.2 4 cylinder has a chain
The 1.6 liter four cylinder has a timing BELT and the 2.0 liter four cylinder has a timing CHAIN