Quote Originally Posted by Astro14 View Post
Lots of things on this car wear out easily, lower control arm bushings, engine mounts, for example, but the engine itself, and this gear, will last forever if properly lubricated. At 250,000+ miles, the car still runs great.
At 250,000 miles, I'm a believer that camshafts and valve tappets are on borrowed time. I'd replace them around 200-250,000 proactively. The bottom end is probably good for 500,000, but I'd do the cam and tappets half way there. The other major top end wear parts to worry about are the valve guides, but you can't do those without head removal. So as long as the guides will go a long time in this engine (I don't know if they are documented to.), then cam and lifters alone will help to guarantee many more carefree miles,
Brett