Update. I took my Jeep to a motor shop to get a estimate of what was wrong and possible causes as my lawyer suggested. They said the noise is from a stuck or bad lifter and they checked the intake manifold for water and dirt damage and found no evidence of any such damage. I took my Jeep back to the dealer and showed them the paperwork I got from the motor shop and they told me they would try to get a hold of the rep. again. I told them to make sure that he calls me this time since the customer service # they gave me told me only way to contact the rep. is through the dealership. They told me they would, but somehow I don't think they will.
My lawyer said to give them 2 weeks if not he will go after them.
Does anyone know if you can adjust the lifters in the TJ's or does it require me to take of the head and replace them.