2008 — 2012
16.0L OM 502 LA V8 - 510hp
Diesel
Monitor the Telligent gearshift system; during your test, listen for any hesitation or clunky shifts that might suggest worn actuator seals or solenoid issues.
Check the V8 exhaust manifold while the engine is running; look for any visible soot deposits or signs of blowing gaskets, which are common areas for heat-related fatigue on the OM 502 LA.
Evaluate the AdBlue system operation; ensure there are no warning lights on the dash, as issues with the Denoxtronic dosing unit can occur on higher-mileage heavy-duty engines.
Inspect the air suspension bags and leveling valves; observe if the chassis maintains a consistent ride height while stationary and doesn't lean after engine shutdown.
Consider a major inspection of the auxiliary drive belts, tensioners, and a comprehensive check of the cooling system hoses.
It is often a good time to evaluate the state of the turbocharger bearings and the high-pressure fuel pump seals.
Usually marks a phase where preventative maintenance on the Telligent automated manual transmission clutch assembly becomes a consideration for long-term reliability.
Keep a close eye on coolant condition to prevent internal corrosion, which is vital for maintaining the longevity of those legendary V8 cylinder heads.
Prioritize regular oil and high-quality filter changes, as the OM 502 V8 thrives on clean, high-specification heavy-duty engine oil.
Regularly grease all chassis points and pivot pins to ensure the suspension and steering remain responsive and smooth.
Clean and inspect the air intake system regularly to ensure the turbocharger is breathing clean air, which protects the engine internals.
Conduct a bi-annual calibration check of the electronic braking system (EBS) sensors to ensure optimal stopping performance and tire wear.
Estimated repair costs if issues arise
Given the heavy-duty nature of these trucks, the clutch is a wear-and-tear item. If you notice signs of slipping or delayed engagement, it's wise to plan for a full assembly replacement.
The electronic gear change system is sophisticated; if you notice intermittent shifting faults, you may eventually need to budget for actuator repairs or solenoid bank replacement.
On a V8 engine of this vintage, the turbocharger works hard. Should you notice a loss in boost pressure or excessive play, you might eventually need to budget for a professional turbo rebuild or unit replacement.
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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