3MZ is interference
Only an Aisin kit, anything else is inferior
OEM Toyota for the cam/crank seals
Had to remember the reason why I went with Gates, so now I've looked back at the Rock Auto information page and the warranty is the difference, Gates had the Limited Lifetime where Aisin had 12 months/12,000 miles. I do appreciate the point, especially being I always tend to frugal choices, but here I didn't have to and can only hope in another 90k I can make that choice again. Thinking of the accusation of being a parts changer, it's nice to only have to change a part and things run good again, diagnostic instinct and skill can be elusive...
Back to the warranty, I now see it's only going to be the parts purchased, a failed part that ruins an engine won't cover the engine. In this application, I'd think the water pump is what I am most concerned with, though I do have time to reconsider the belt or other component as/if necessary. Likely at most, the OEM Toyota for the cam/crank seals is what I would change out at this point being they are likely in stock at the dealer, I may check into that more. I should also read some of the "similar threads" posted below.
I actually don't know if I have time, 188k and the maintenance history had 2 items and neither was a timing belt, but there are 2 fairly new looking Toyota belts for the alternator and power steering and I'd like to think the same exist under the timing cover, I'll find out next week-end. The plan is to keep driving the van for the week to evaluate any other issues before the long week-end. I'll say thanks too, for the post and comments, the learning never stops.