To determine if aerated fuel is causing the cylinder to misfire, perform the following steps: 1. Disconnect the fuel line return hose from the fitting…

To determine if poor vehicle ground is causing the cylinder to misfire, perform the following steps: 1. Remove alternator belt. 2. Start the engine. 3.…

Used lube oil analysis can identify a potential source of engine trouble before it occurs. A program such as the Detroit Diesel Oil Analysis Program…

To determine if a defective oil pump is causing low oil pressure, perform the following steps: 1. Remove the oil pump assembly; refer to appropriate…

To determine if defective crankshaft main bearing shells are causing low oil pressure, perform the following steps: 1.Check main bearing to crankshaft journal clearances; refer…

To determine if a defective pickup screen tube or screen assembly is causing low oil pressure, perform the following steps: 1.2.Remove pickup screen tube and…

To determine if a defective pressure relief valve is causing low oil pressure, perform the following steps: 1.2.Remove the pressure relief valve; refer to appropriate…

To determine if a defective bypass valve is causing low oil pressure, perform the following steps: 1.2.Remove the oil filter adaptor; refer to appropriate service…

To determine if a nonfunctional or sticking regulator valve is causing low oil pressure, perform the following steps: 1.2.Remove the oil pressure regulator; refer to…

To determine if a restricted oil cooler is causing low oil pressure, perform the following steps: 1. Connect to DDDL 7.0. 2. Start and run…