I have a 720D that when warmed up , the oil pressure runs at L at fast idle and below L at normal idle. I changed the oil to standard 30 weight Rodilla diesel oil. Also I changed the relief valve and spring to one I bought on the ebay since you can't buy these new any more. Both of these had no affect on the pressure. I am now wondering if my gage could be bad. Can someone recommend a good oil gage that has numbers on it rather L M H , so I can see the actual pressure.
If this doesn't work, I assume that the bearings are loose. Can the bearings be changed without removing the crank?
If this doesn't work, I assume that the bearings are loose. Can the bearings be changed without removing the crank?