Chrysler Repair: engine tappet noise, engine oil additive, tappet noise

Question
i have a ram 1500 v8  and it has a lifter tap type of noise ,so i took them out and found more then half collapsed,so i replaced them , changed oil and stated up and noise still there , any info will help i know this is newer and a truck , once again any info will be great

Answer
Hi Jimmy,
The only suggestions I can offer are to look at the oil pressure reading at the oil pressure sender unit usually located near the oil filter, using a calibrated gauge (should be over 35 psi at 3,000 rpm in most engines),  and also look into the possibility that the engine internal oil line that supplies the lifters may have an obstruction due to dirt in the internal passageway. I don't have a manual on that engine so I can't offer specific info about the oil distribution system and where you might gain easy access to clean it out. Perhaps using an engine oil additive just before the next oil change which is claimed to dissolve sludge, etc. might be an alternative. Finally raising the weight of oil one grade might increase the pressure in the system sufficiently to pump up the lifters.
If you have success please let me know what worked.
Roland