Try a can of Berryman OIL CHANGE FLUSH (part #1216) immediately before your next oil and filter change. If 1216 doesn't cure the sound, you may have use Berryman B-12 CHEMTOOL FUEL INJECTOR CLEANER (part #0116) in your COLD engine oil at a rate of 1½-2 fl oz/quart of capacity. For instance, if your engine holds 5 quarts of oil, then you'd add 7½-10 fl oz of 0116 to the engine oil. Then run the engine until hot (about 10-15 minutes) and change the oil and filter.

03 F150 5.4L used in gas fuel Chem B12 mixture for smoother running higher Mpg s. But Can (6oz in a 6qt eng) be used in my Oil for carbon and sludge clean out right before each oil change. I just did this 2weeks ago and drove straight 15min to my oil lube center and it's so clean my valve covers started leaking to my surprse. I have an older ford Trinitron 150k mile engine. Going to replace gaskets this weekend. But Is it better not to add to older engines m like my SOHC 5.4L? Thanks for your reply. Put this on your FB ask a question page too in comments.

No reason not to do this on your 150K mile engine as well. As long as you plan on changing the oil when done.