Have you ever had a set of cylinder heads come into the shop from a Chrysler, Dodge or Jeep application and the customer says, "when I took the valve cover off, I found the rocker lying on top of the cylinder head" or "the engine has a valve- train issue with it." Well, that seems to be a common problem with the above mentioned applications that have the 3.7, 4.7, 5.7 and 6.1L engine and we believe we know what the problem is.
While researching this problem, AERA has found no documentation from the OE stating what is causing this to happen. We have received several calls from AERA members regarding this issue and the AERA Technical Department can only speculate that the cause of this problem is the valve seat does not have sufficient
press fit into the cylinder head. "What is the factory press fit," you ask? Well, that
we do not know; all we believe is that the press fit being used is not enough to keep the valve seat in the cylinder head.
With the help of an AERA member who supplied us with some pictures, we hope to clarify the problem and explain it so that this information can be given to the customer as a way to better understand the problem and why replacement of the valve seats is recommended.