When was the last oil and filter change?
To actually know what's happening with the oil pressure -you have to hook up a mechanical gauge to where the oil pressure switch is and read the pressure if normal replace the oil pressure switch out of calibration -abnormal could mean an oil pump and engine bearings-sludge/debris in the crankcase could be clogging things up in there that's the pick tube screen and oil filter-
If the relief valve on oil pump is sticking then what is the solution to fixing? Replacement needed here.
I strongly recommend an engine flush and go from there.
When the oil leaves the pump, it passes through the filter before going on to the bearings and oil galleys. All filters create a certain amount of resistance to flow that increases with the rate of flow. But the amount is not much, typically only a couple of pounds. But as the filter becomes clogged with debris, the restriction created increases. Eventually the point may be reached where no oil will pass through the filter element. So to prevent such a blockage, a pressure relief valve located in the filter or where the filter mounts to the block is designed to open if the pressure differential across the filter exceeds a preset value (typically 5 to 40 psi). This allows the oil to bypass the filter and keep on flowing. But the engine's oil pressure will be reduced to that of the bypass valve. Replacing the plugged filter will solve the problem.
Thursday, August 20th, 2009 AT 9:51 PM