I adjusted the valves last night. Everything looked pretty clean and new (the engine was reportedly rebuilt 30k ago) so I didn't look at all the adjuster studs to see if they were worn. I got everything back together, and for the first 5 minutes, the truck was much quieter... then one of the valves seemed to get a bit noisier again. I could just be hypersensitive to the noise now, but it did sounds like it got noisier again. Nowhere near as noisy as before though. ANyway, I'll probably check em again in a week or two and see if I need new adjuster studs.

Also, I was able to see that the timing chain guide is not steel backed. I hoped they would have done that when they rebuilt the engine, but it appeared to be a very dark grey/black plastic with no metal anywhere. BUt it did look very new and not worn.

One other thing: my truck has a bit more top end power than I was expecting, so I thought maybe it would have an aftermarket cam in it. I took some photos of the markings on the cam, but I forgot to bring the camera to work with me to upload them. If I remember correctly, the cam had "CWC" stamped on it at one place, and had some other single numbers stamped on it here and there, like a 5, a 3, and an 8. ANybody familiar with any of these markings? LIke I said, I have photos, but it'll be a day or so before I get them up.