Thanks for the information and the link. Now that I think about it, I do remember reading it once before. Given the mileage on the car (102,000), I should probably check the oil tube, rockers, timing chain, etc.
I have to say that this site has been a terrific resource. I don't know where else I could have found out as much as I did about my cars. Thanks.
1986 560SEC: 150,000 miles, runs great, but I've got to sell it (too many cars for one man)
1987 560SL: 122,000 miles, used to run poorly, now (thanks to forum), runs great!
1997 GMC Jimmy: Turned out to be a turkey.
1989 T-Bird Super Coupe: 150,000 miles, still runs great. Ford got it right.