Quote Originally Posted by mushroom_toy
You know its probably just the timing chain guides. Toyota for whatever reason used plastic guides for our trucks back in the day, and these usually break, then the timing chain starts slapping against the walls, so If I were you I would just get some metal ones and be done with it. Mine has metal ones, they were replaces years ago lol.
He speaks the truth, things get ugly when the guides break. Seen many a 22R with a busted timing cover.