Guys need some help. Just got through replacing both rocker arm assembly on my 3.5v6 Avenger. The car has the same symptoms. The idle and performs well but under med to high RPM's I get a ticking sound. At idle its fine. its only when accelerating or why I am driving on the freeway appox 55-65 mph when let up on the accelator I can here the ticking comes back and then goes away when I return to normal speed. Do I have a bad cam or are there hydraulic lifters in this engine.

 

it looks like I also have an issue with the upper intake manifold. its causing most of my rattles and ticking. There are some flanges inside the manifold that adjust air flow into the engine and some of the flanges are rattling and ticking. Looking for a new or used upper intake manifold for a 3.5l v6 (2010 Avenger)

 

Ok I have replaced both rocker arm assemblies, the upper instake, I still have the ticking sound. It starts at round 2000 rpm's. Anyone know on how to check for a bad valve spring or valve guides?