Around 2001~2002, factory design of 2 OilPressurized & 1 LeafSpring TimingTensioners were improved\revised,
though for any year model with the V6~4.0L~SOHC, if engine has not had regular Oil+Filter changes,
more likely the OilPressuized TimingTensioners fail, causing broken TimingGuides, Chains slapping\breaking ValveCovers, Engine damage.
They tend to stiffen\sludge up if neglected.
Watch out for
* "Death Rattle", sounds like a diesel idling
* left ValveCover cracked\leaking at the front
* right ValveCover cracked\leakng at the rear
* schrapnel from broken TimingGuides in the OilPan.
Along with 5kMile\6mth Oil+Filter changes,
renewing the 2 OilPressurized TimingTensioners (relatively cheap+easy) every 100kMiles\12years is advised.