The turbo’ shaft spins at up to 150,000 RPM and intense heat from the exhaust gas is conducted along it to the bearings. So a good supply of quality oil is vital to lubricate and cool the bearings. The turbo oil is supplied by the engine oil pump via a pipe leading into the top of the turbo from where it flows through the bearings and out through a drain pipe back into the crankcase.
It‘s important to use the oil grade specified for your engine it handle the extreme temperatures in the turbo and provide the correct flat for the bearings. Change the oil and filter at the recommended intervals to prolong turbocharger life.
At service times, check for oil leaks from the feed pipe and renew the pipe or gasket if oil is weeping. Also check the drain line, which sometimes incorporates a hose that can kink, split or abrade on other parts. Check security of clips and flange bolts.
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