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Tag Archives: Oil Drain

Why Your Turbo Blows Oil

Oftentimes if the turbo in your vehicle begins blowing oil, people will tell you that the turbo seals must be bad but this is usually an unfounded claim. A lot of the time your turbo can still be in perfect working condition but blowing oil, so with that in mind here are a few of the most common problems and reasons that your turbo is blowing oil. The Oil Drain Is Too Small– If you purchase an aftermarket drain, oftentimes the fitting has too small of an inside diameter. This is the most common cause of oil coming from the turbo because a factory MHI Drain has 16mm inside diameter while most aftermarket drain fittings have an inside diameter of 12mm. This size difference then causes the oil to not drain efficiently and the oil can back up inside the cartridge. Coupled with new oil filling up the cartridge and all of the old oil ... read more


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