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Re: Engine lifespan
From my research when I was looking buying and rebuilding my first 4.8 the report I read said miles before a rebuild was designed to be 250,000. So I think you could get 300k to 350k with good maintenance. I took apart my 4.8 at 225k and could see cross hash in the cylinders and the bearings looked good for that kind of miles. The bores were within spec and it just needed a clean up honing.
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