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Showing results for tags 'high mileage'.
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Original owner, all stock 2015 2500HD WT 6.0 gas 190k miles. Cylinder 3 exhaust valve tip almost gone. Engine developed a low noise valve tick on start up and idle, 3k miles later, louder and at all rpms. Intermittent (twice) P0303. Removed valve cover, rocker arm and observed damaged valve. Roller lifter and cam journal showed no signs of damage. Of the eight valves, one destroyed and three others showing wear( pic 3) Inspected passenger cylinder head valve bank, no signs of wear or damage. Oil stain seen through exhaust port. Informed GM and assigned case #9-5190338716. The truck has been a solid performer and provides great service. The short years and high mileage may indicate future issues with valve lots that may be below specification. My plan is to replace all valve parts including lifters. Should GM want to inspect these parts, I will make them available upon request.
