Originally posted by viking
Nuthin personal but if you really are THAT mechanically challenged ya might want to take it to a shop.
Probably, good advise, but if you want to have a look, look for any loose or broken rocker arms, or bent pushrods.

The rockers may just need resetting.

If they are hydraulic lifters, with it idling, loosen a rocker nut until it ticks and then tighten until the ticking noise stops. Then tighten 1/2 to 3/4 turns more.

Do this for each rocker.