scdomizio Posted September 12, 2013 Share Posted September 12, 2013 I have a 2008 GU713 with 110,00 miles that already needs an engine rebuild. The rings were broken on #1 and #6 and scratching on the others. Our Mack Dealer tried to get Mack to pick up some of the cost and they refused. The cost is almost $15k. We own 6 Mack trucks from different years and haven't had issues. Has anyone had ring issues with the MP7? Quote Link to comment Share on other sites More sharing options...
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