2002 grand cherokee 4.7 right head asy replaced lifter noise right front only warm... Mark

Hes right dont mix them up, i have an 03,,,,, 4,7,,been doing this for 30 years, mine had a terrible noise, when i bought it, i changed the oil, added, oil stabalizer, its better but still lifter, or cam follower noise, left side, i diid find an article, in here that made sense, they are prone to cam sensor failure, and if the tensioner, has an issue they will missfire, and set cam sensor,codes, the cam and crank, sensor work in synch, comparing each others signal, on some engines, we can see, an asynch,signal, on the scan tool,get the covers off run the engine, look for oiling on each cam lobe. also, i can only remember having broken valve springs on chrysler products, have a good look at them, take a small, screwdriver, and gently move the spring, pry on it, with this style, engine overhead cam, oiling is critical,

If the oil pressure is good, likely you got dirt into a lifter while you were working on it. You can take it apart again and clean out the lifter, or add marvel oil and if the stuff that got in there is carbon and not sand etc, that may dissolve it, or replace the lifter. If I were to go through all the work of taking it apart again, I'd opt for a new lifter, Also make sure that the rocker and pivot aren't worn or you may be wasting your time there.
Never re-use a lifter unless it came from the exact location it had been installed in, and then, only on the same cam it was used on. lifters once used, establish a wear pattern and will ruin a cam very quickly if replaced out of order.