Question about VVT-i Toyota engine

seems like only thing I gotta do is coolant, tranny service, and new plugs @ 100k, the timing chains sometimes start to slap around 150k, but there is a tensoner that you can buy that’ll tighten it up??? or just replace it, whatever either way… there is like no maintance, not like old school carbs were you gotta play with something every week :tup:
but of course this is just the DD, not the racecar