Tracy:

 

This engine has 155 hrs on it and the cylinders were pulled and sent in for inspection and they checked out good and were simply honed and new rings added.  The oil temp has been running right at 220 degrees (taken at the oil screen on the accessory case as is std on the O-290s).  I have read that should drop a bit once the rings fully seat in.  Next time a run it I'm also  going to shoot the front two cylinders with my infra red thermometer right after shut down to see what it shows on the barrels, and I also am going to move the sender to a lower plug and see if that changes anything.

 

EGTs are my real puzzle though as to why all four would be maxed out.  I've never heard of a Lycoming generating that hi an EGT and that was the sole domain of rotaries!  :)

 

Thanks for your ideas on this...

 

Doug