Bodyart,

Have you checked the elongation of your timing chain? Having 185,000 miles is no reason to replace a timing chain if the cam is not more than 4* late.

MY '80 300SD has 244,000 miles and I'm not about to replace the chain because last time I checked the cam timing, it was less than 3*. However I did replace tje chain tensioner because it was jamming and not keeping the chain tight.

If it ain't broke, don't fix it.

P E H