MaxxForce 11/13 - TECH TIPS

ENGINE INSPECTIONS:

• Engine Oil Level - Look not just for Low Oil Level, but HIGH OIL LEVEL. Fuel Dillution 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. 

• Diesel Lift Pump - Early model engines use a "plunger style" lift pump, later models use an "electric style" lift pump. These pumps should hold pressure at ~70PSI and ~100PSI respectively under load. If finding high variance, replace the Lift Pump. 

• High Pressure Fuel System - The 11/13 engines use a High Pressure Common Rail fuel system (vs the DT-Series that use HEUI style injectors, high pressure OIL system). Using N.E.D. test the High Pressure Fuel System to check for internal or external leaks (worn internal valves in the Fuel Injectors are most commonly the root cause for loss of fuel pressure - requiring new Fuel Injectors to be installed). 

• Oil Leaks - Look closely for any Oil Leaks bleeding through rubber CAC boots. 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.

• SOOT/OIL in Intake - Damaged Turbocharger(s) will often lead to high amounts of Oil/Soot in the Engine Intake. Damaged Turbocharger(s) are generally due to failed CCV Filters, allowing Oil Aerosals to enter the Turbo, cavitating the impeller blades and damaging the bearings. 

• Soot Clogged Sensors - The 11/13 engines commonly has issues with high amounts of Soot/Oil in the intake. Over time sensors such as the Manifold Air Pressure (MAP) Sensor will completely clog, forcing the Boost Pressure to read only 0-PSI, causing the engine to run very poorly. It is worth pulling out the MAP Sensor from the Intake Manifold and inspecting for soot clogging.  

• EGR COOLER - Maxxforce 11/13 engines have common problems with cracked EGR Coolers, allowing coolant to enter the EGR Cooler, and ultimately enter the engine intake, causing poor engine performance. (Post 2010 MaxxForce 11/13 engines do not have an SCR System, as all other post 2010 diesel engines have, rather the 11/13 models use significantly more cooled EGR in attempt to meet NOx regulations. There are (2) EGR Coolers on the 11/13 engines). 

• DPF REGEN Full Test - Running a DPF Parked REGEN can provide significant info on the DPF (and engine) Performance. Look at Exhaust Temps over duration of REGEN and compare to proper running REGEN.  Exhaust Temps at DPF Outlet should reach ~1,000F.