You have two cams one on each bank. they are under your valve covers left and right. In the middle of your block near the roof of the block you have a balance shaft. see pic Although not know to make noise it is kept in place by a cam bearing on either end. they may be worn. THis is a chain drive system and some noise may be normal of course hydraulic lifters can be noisy at times.
CAUTION: The silver bolts retain the guides to the cylinder heads and the black bolts retain the guides to the engine block.
CAUTION: Remove excess oil from the camshaft sprocket bolt. Failure to do so can result in over-torque of bolt resulting in bolt failure.
CAUTION: Ensure the plate between the left secondary chain tensioner and block is correctly installed.
CAUTION: After pulling locking pins out of each tensioner, DO NOT manually extend the tensioner(s) ratchet. Doing so will over tension the chains, resulting in noise and/or high timing chain loads.
You have two banks of cylinders. One cam for each. Two valves per cylinder is one cam SOHC. Typically 4 valves per cylinder have 2 cams for each bank. DOHC
Noise: If it were me I would have the Dodge dealer listen to it just because they see this engine every day. They can tell you weather or not it is ok..