To determine if a defective turbocharger is causing excessive oil consumption, perform the following:
1. Remove the turbocharger drain line connected to the crankcase and place the drain line into a suitable container.
2. Perform a crankcase pressure test.
If the engine crankcase pressure is less than 0.75 kPa (3 in. H 2 O), replace the turbocharger;
If the engine crankcase pressure is 0.75 kPa (3 in. H 2 O) or more, check for worn or damaged valve and cylinder kit;
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