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Repair cases shared by mechanics and reviewed before publishing. Hide the solutions to diagnose them yourself first. Cases marked "Training case" are written by ipacen from typical faults for practice.

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Training caseCoolingHardDiesel

Losing coolant with no visible leak and bubbles in the tank

2008 · Toyota Avensis (T25) · 2.2 D-4D (2AD-FTV) · 205,000 km

No fault codes

Root cause: Head gasket failure at cylinder 3, caused by oil consumption and carbon build-up; the aluminium block deck was no longer flat.