Volvo D11/D13 - TECH TIPS

ENGINE INSPECTIONS:

• Engine Oil Level - Look not just for Low Oil Level, but HIGH OIL LEVEL. Fuel Dilution from failing Fuel Injectors, Cylinder Washout, Etc, can cause High Oil Levels.  

• Fuel and Oil Consumption - Check with Operator to determine if there has been recent increases in Fuel or Oil Consumption, or other changes in engine performance. 

• Air Leaks - Several engine and DPF components require compressed air, which is obtained from the brake air system. Therefore, repairing all air leaks is incredibly important. 

• Oil Leaks - Look closely for any Oil Leaks bleeding through rubber CAC boots, EGR Flanges, Etc. Oil entry into the CAC and Intake is a very common problem due to a failing Crankcase Filter Assembly. This causes Soot/Oil to mix in the EGR System and cause major engine problems.

• Exhaust Leaks - Inspect the engine for exhaust leaks at the Exhaust Manifold, Turbo Outlet Pipe, EGR Valve, EGR Cooler, EGR Cross Over Tubing, Etc. Exhaust leaks will cause engine power loss, rough engine running, frequent DPF REGENs, inefficient DPF REGENs, Etc.  

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• CCV FILTER - SOOT/OIL in Intake - A failed Centrifugical CCV FILTER allow Oil and Soot to enter the Engine Intake and Turbo. Serious engine damage and DPF damage will occur, and engine will run poorly.  If high amount of Oil/Soot found in intake, may need to remove the CCV Filter and ensure it is spinning freely and quietly. 

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• TURBOCHARGER Damage - Remove the Air Intake Boot to the Turbocharger and inspect the impeller/propeller blades for visible damage. Spin the Turbocharger shaft and inspect for bearing damage and/or play.

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• BOOST LEAKS - Loss of Boost Pressure due to leaks in the Intake Manifold will cause numerous engine and exhaust aftertreatment problems. Visually inspect the Intake System, EGR System, Turbocharger, Etc for leaks. Also may use PTT to run various tests on the Turbocharger and Air Management System.

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• EGR COOLER - Inspect for soot blockage in the EGR Cooler, or Coolant Leaks. 

• PISTON COOLING VALVE - The Volvo D-Series engines utilize Piston Cooling. A small orifice in each cylinder sprays a small amount of oil on the piston to keep it cool. The Solenoid that controls this oil flow is located outside the engine, at the Oil Manifold that houses the primary Oil Filter. This Piston Cooling Solenoid Valve fails often (as does the Oil Pressure Sensor nearby). Recommend replacing these parts if needed, as other engine issues may occur as a result, if left alone.  

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• DPF REGEN Full Test  - Initially when the REGEN is initiated, the Turbocharger VGT Actuator closes to (85-95%) and exhaust temps rise to over 500F. If exhaust temps do not exceed ~500F within 10 minutes, most likely there is an issue with the Turbocharger VGT Actuator. After exhaust temps exceed ~500F, the DPF Fuel Injector turns on, and diesel fuel contacts the catalyst, if the catalyst is working correctly the exhaust temperature downstream of catalyst will exceed 1,000F. Older style Fuel Injectors are located just downstream of the Turbo. Newer style Fuel Injectors have a Dosing Module located on the left side of engine, and a Nozzle located downstream of the Turbo. These Dosing Modules have been found to fail frequently.