Another ticky engine question + CEL

I just bought a 2000 Rodeo with a pretty loud tick. This is my 5th Rodeo, and they all have had ticks at some point, but this one is pretty loud. I assumed it was the timing belt tensioner, but before I order the $185 part from Seattle I want to make sure that's what it is. It's a constant tick, that is louder with acceleration and is loudest at idle and acceleration. Once I take my foot off the gas it fades to quiet enough that the heater blower noise covers it, but it never goes away. I also have a CEL on.

http://forum.planetisuzoo.com/viewtopic.php?t=32816

There are a couple of videos in the link.

It could also be a spun rod bearing (typically happens on the +98 due to low oil).

Thank you for the link! My tick definitely sounds like the third video: lifter tick.

The +98 isuzu had hydrolic nonadjustable lifters. Lifter tick was common on the 93-97 3.2L...

you may have dirty lifters and a 1/2 can of sea foam may help out.

Super, I picked up some Seafoam tonight. Hopefully that and an oil change will do the trick.

Ok, so hubby did an oil change, ran some SeaFoam and changed out the t-belt tensioner, but to no avail--the tick is just as loud as before.

What's next? Valves?

This engine only has 67K on it...