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  1. S

    piston oil ring problems

    Has anyone had to do any cutting of the inside oil spring ring to fit their pistons without cracking the ring? Mine don't compress enough to fit
  2. S

    piston oil ring problems

    I am new here and thought i would see if anyone could help me out. I have an 08 6.4 job1 that i am currently working on. I won't go into details but it needed an overhaul at only 100k due to weak cylinders across the board. I am using the redesigned Navistar pistons which are Mahle (224-3851)...
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