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I thought that 71K was a little soon to blow something so important as the HPOP, but I'm a little in the dark about such things. And yes, I do change the oil every 5K. I've also heard that the new CJ-4 oils don't contain the lubricants our pre-2007 engines need and that CI-4 is preferred. Next oil change I'm going to try to find some--it can't hurt.
Does the pump have to come out to change the o-rings, or can it be done on the vehicle?
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