thank you all for the things to look for . most of the stuff listed i have already checked and removed from possible problems. it is not the valve covers, or the oil pan, its coming from the rear main seal. i always lube the seal and silicone the bearing retainer, and with the ultra seal they give very specific instructions on how to install it. I did not know about the bulletin and will check that out. I will have to pull the engine there is no way to get to the ultra seal or remove it without pulling the crank. i will look fro the threads and get back to you all with what i find. again thank you for your thoughts.