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| Have replaced just the orings on some of those ranging from 3000hrs up to 18000hrs. If they were not run long with coolant in the oil there's no need to change anything else. If I wouldn't have known the hrs of the high hr 1s I would have pegged them at 3-5000 hrs. The wear was not noticeable. I've been surprised how long you can run them with coolant in the oil before the rod bearings start showing wear !! | |
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Antifreeze in Magnum
