My wife recently bought a 1990 L series sports wagon. Every mechanic that has looked at it to date comments on how good it's condition is..but.. my wife reports that there is an intermittent engine noise, a loud clacking or ticking noise. The noise seems to be coming from around or below the distributor , but not from the distributor. Sounds a bit like a noisy lifter, but being unfamiliar with these motors I'm not sure. Any ideas?