I know at some point the engine was either rebuilt or replaced in the truck I currently own ('91 Pickup with 22RE). I'm not sure exactly when-the truck has 160K on the clock and my best guess is that the timing chain let go around 90-100K, but that could be off. If I'm right, the current chain has been on for about 60K. What is the timing chain change interval?

 

Typically 90-120k or when it starts clanking.

:wabbit2:

 

Mine is on the original chain and guides at 144K miles. This is with the driver side guide broken at the top bolt hole since I bought it at 95K miles a little over two years ago.

I think I will get around 200K out of mine. I would pop off the valve cover and take a look and decide whether or not you want to replace it. If everything is intact and it's not making any noise I wouldn't worry about it.

I'm not recommending to run it like I have mine, it's probably best to replace it if it's broken but I have put around 50K on mine in two years like I said and it hasn't got any worse.

I just use rotella 5W40 T6 and change it every 3K miles. I think a good, thicker oil helps.