2004 — 2013
4.2L I4 (OM904LA)
Diesel
Check cold-start idle stability | Note: The OM904LA engine is prone to injector nozzle wear; a rough idle or excessive smoke on start indicates impending fuel system maintenance.
Test all forward gears under load | Note: Watch for 'jumping' out of gear or synchro grinding, as Atego transmissions can suffer from worn selector forks under heavy haulage.
Inspect chassis rails for oxidation | Note: Look for surface corrosion or flaking paint near the rear axle, as NZ coastal climates can accelerate frame fatigue on commercial fleets.
Verify AdBlue/SCR warning lights | Note: Ensure there are no active emissions faults, as these units are sensitive to NZ-specific diesel sulfur content and sensor fouling.
Initial break-in oil analysis recommended and torque check on all suspension U-bolts.
Major service interval including replacement of fuel filters and checking of the turbocharger actuator linkage.
Comprehensive inspection of the clutch wear levels and potential replacement of water pump and tensioner pulleys.
Perform full engine oil and filter change every 15,000km using low-ash heavy-duty engine oil.
Inspect and grease all driveline universal joints and kingpins during every service interval.
Drain water separators on the fuel system monthly to prevent injector rail damage.
Conduct a full diagnostic scan to check for 'hidden' engine management fault codes stored in the Telligent system.
Check brake pad thickness and air-dryer cartridge condition annually to ensure reliable stopping power.
Estimated repair costs if issues arise
Preventative maintenance is cheaper than a piston-melt from a leaking injector.
Listen for high-pitched whistling; address at the first sign of bearing play to avoid catastrophic failure.
Budget for replacement around the 250k-300k mark if operating heavily in urban stop-start traffic.
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Disclaimer: This report is generated with the assistance of AI analysis based on verified automotive data. While we strive for 100% accuracy, enthusiasts should always conduct physical inspections and consult service records. View Full Disclaimer