The update on the oil pressure problem is... A local mechanic has ran the truck with a mechanical oil pressure guage. It appears that the oil pressure problem is atleast partially mechanical in nature.Oil pressure dropped as low as 6lb on mecanical guage. I have worked in automotive machine shop's in the past and am fully aware that bearing clearances are a common cause of low oil pressure. It is my hope that possibly replacing the oil pump might fix my problem. It was also mentioned that some type of oil pressure relief valve might be the problem. If anyone is wondering if I am trying to avoid the dealer the answer is yes!. Is there a good book that is dedicated to the cummins ISB diesel?. Thanks again for any helpful input.
Last edited by Fishguy50; 03-23-2009 at 08:33 PM.