lsmalley, Your method can also be viewed as high level maintenance/preservation since some of the parts you replace now may not be available in a couple of years when they fail. My method used to be on high mileage cars was if a part was off for any reason and was a wearable item e.g., a belt, hose or bulb it got renewed. I think this upped reliability and in the long run saved time...my $0.02.

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"Rudeness is a weak man's imitation of strength" - Eric Hoffer