RollOffKing270 Posted August 8, 2024 Share Posted August 8, 2024 I’ve got a 2004 Mack Granite CV713 with the E-7 AI-350 engine. All of the sudden I have encountered an oil leak from the turbo return line. I have replaced the round o-ring gasket with a brand new one which did not fix it. You can wash all the oil off and let it idle and not a drop, but once driven the passenger side will get covered again. No restrictions. Breather is clear.. Quote Link to comment https://www.bigmacktrucks.com/topic/74435-2004-mack-granite-blowing-oil-from-the-return-tube/ Share on other sites More sharing options...
fjh Posted August 9, 2024 Share Posted August 9, 2024 This is likely a turbo issue ! The turbo shaft seal is letting exhaust gases by and pressure into the crank case! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74435-2004-mack-granite-blowing-oil-from-the-return-tube/#findComment-556739 Share on other sites More sharing options...
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