DJ Says Your Turbo Is Full of Ash.

Your turbocharger spins at up to 200,000 RPM on a thin film of engine oil. That oil is what keeps it alive. When the oil degrades — or when carbon and ash build up inside the housing — the turbo starts to fail.

In Alice Springs, both of those things happen faster than average.

Every time your DPF does a regeneration cycle, it burns off accumulated soot at high temperature. Most of that soot turns to ash, which is designed to stay trapped in the filter. But some of it makes its way back through the exhaust system over time.

Short-trip driving means the regen cycle runs more frequently, and incomplete regens push partially combusted material back through the system. Over time, ash accumulates in the turbo housing, on the variable vanes, and in the intercooler.

Red dust that gets past a worn or damaged air filter goes straight into the turbo compressor. Sand particles at 200,000 RPM act like sandpaper on the compressor wheel. The damage is irreversible.

This is why air filter condition is not a minor maintenance item in Central Australia — it's directly connected to turbo life.

• Blue or grey smoke at startup or under acceleration
• Whining or whirring noise from the engine bay
• Loss of power under load
• Increased oil consumption
• Oil in the intercooler or intake piping

Change your air filter more frequently than the logbook says (in Alice Springs, that means every 10,000km minimum, less if you've been on dirt roads). Use quality engine oil and change it on schedule. Get your DPF maintained properly so it's not overworking the regen system.

Smart Offroad Mechanical | [phone] | Alice Springs