i have always noticed a loud ticking at times with my diesel. i sort of blamed it on the rack damper bolt, but after i installed the new one today, its still ticking. it sounds just like a gas engine that has a very bad lifter ticking.
heres the deal though, increase rpms just to 1100 and the ticking stops. another scenario... put in gear, ticking stops. park or neutral, ticking returns. its all related to rpm and gear selection. got any ideas????