Man I hope not. I have an autometer oil pressure gauge. At cold start up its 75 psi. When reached opperating temp at Idle its about 40psi. As soon as I hit the gas the pressure jumps to 65. My friend checked the header to block bolts and wrapped the flex pipe no change in noise. No exhaust leaks. Tomorrow he is doing a compression test and Ill have him check the oil again. Is it a common failure to have the bearings wear out if thats my problem. Ill have him read these replys and see if he can check the rod bearings. Can you access it threw the oil pan? Is there a way to check before tearing into the motot? Thanks for your help.