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Detroit Diesel - DAILY & MONTHLY INSPECTION

The following lists all common Daily and Monthly Inspections that should be performed on Detroit Diesel Engines and DPF/SCR Systems.

DAILY


DAILY
   INSPECTIONS

ENGINE INSPECTIONS:

  • Engine Oil Level 

  • Coolant Level & Inhibitor

  • Fuel Tank & Breather

  • Fuel Leaks (High Pressure Lines and Low Pressure Lines)

  • Exhaust Leaks

  • Turbocharger Air Intake, CAC, & Boost Side of CAC

  • CAC Boots (cracked? Boost Leaks?)

  • Crankcase Breather & Tubing

  • Accessory Belt

  • Cooling Fan & Shroud

  • Engine Noise (Exhaust Leaks at Exhaust Manifold - loud whistling?)

  • Air Leaks in compressed air system (brakes)


 

DPF DAILY INSPECTIONS:​

  • Exhaust Leaks or Damage to Exhaust System or Mounting Hardware

  • Wetness due to Fuel Leaks at DPF Fuel Injector

  • DEF Crystallization at DEF Nozzle or anywhere in exhaust system


 

MONTHLY


MONTHLY
   INSPECTIONS

ENGINE INSPECTIONS:

  • Engine Air Filter Indictor

  • Charge Air Cooler and Tubing, signs of wetness from Oil Entry from CCV System or Turbo Oil Consumption

  • Turbocharger & EGR VPOD System (Compressed Air Leaks?)

  • Coolant Quality and Level

  • Radiator Blockage or Leaks

  • Diesel Exhaust Fluid Contamination

  • Turbocharger Air Intake, CAC, & Boost Side of CAC

  • Crankcase Breather Tubing (Excessive Oil bleeding through rubber hoses or flanges?)

  • Engine Mounts & Mounting Bolts (Cracks? Loose?)

  • Air Compressor (Heavy Oil at Purge Valve under truck?)

  • Battery & Alternator (Corrosion? 

  • Coolant Reservoir & Coolant Level Sensor (wiring damaged or cut?)

  • Water Pump (Weep-Hole leaking coolant?)

  • Inspect the EGR Cooler for signs of cracking or damage (coolant leaking into exhaust or exhaust into coolant?)

  • EGR System (Remove EGR Cross-Over Tubing, Soot Blockage internally?)


 

DPF MONTHLY INSPECTIONS:

  • Excessive DPF Active REGENs (per the operator, or via DDL6 or DDL8 Diagnostic Software)

  • Exhaust Leaks (Bellows cracked at EGR System or at DPF?)

  • Signs of Heat Damage at DPF Differential Pressure Sensor & Tubing and DPF Wiring Harness [Post-2011 models will need to remove the Passenger Stairs and One-Box Heat Shield to access]

  • Blue or White Smoke exiting DPF due to Oil Entry or excessive Diesel Fuel Consumption


 

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