Low power, excessive noise or smoke is often blamed on the turbo. Yet turbochargers are extremely reliable – only 1% of so-called turbo failures are due to a fault with the turbo itself.
The turbocharger is an integral part of the engine’s air, fuel, cooling and oil systems, so any problem in these systems will have an effect on the turbo. Before you fit a replacement, it’s essential to find out what caused the turbo to fail – or you may just repeat the problem.
CHECK HOSES
A blocked filter or intercooler, obstructions, or leaks or splits in any hoses or pipes can lead to turbo failure. A split air intake hose can make the turbo over-rev and over-boost.
A split hose can cause over-revving.
CHECK SPECIFICATION
Is the engine modified or worn out with low compression? If the turbo isn’t receiving the amount of energy it was designed for, it won’t perform properly or may fail prematurely. Even simply overfilling the engine oil can over-pressurise the system and damage the turbo – or suggest there’s a turbo problem.
A worn engine will not provide enough energy for the turbo.
CHECK THE OIL
Over 90% of turbo failures are oil related: either oil starvation or contamination. So examine this area first when you’re searching for a fault. Remember it’s vital to change the oil, and replace the oil and air filters when you fit the new turbo. When a turbo stops working, it seems obvious it should take the blame. But in nearly every instance, the reason for the failure almost certainly lies elsewhere.
A turbo is part of the oil, air, cooling and fuel systems. Check them all.
You can find more information on the BTN Turbo website.
