2000' Accord Low mileage - Engine replaced

I own a 2000' Accord 4-Cylinder 5-spd with only 35K on the odometer. About a month ago, I noticed a metalic rapping noise coming from the engine bay. At first the noise would go away after the engine warmed
up, but progressed to intermittent noise when the engine was under light load usually under 3000 RPM. It could be duplicated with the car in neutral and reving to 3000 RPM tried several tanks of high test, with no change. I checked everything attached to the engine such as heat shields and found nothing loose. I finally had to bite the bullet and take the car to the Honda dealer. Several days later , I got a call saying that the noise was coming from the lower end and that the pan would need to be dropped ($170) The next day, they said the head would need to be removed. Several days later I was told that Honda recommended replacing the engine block. They would pickup yhe cost of parts and I would have to pay labor ($1700). They never did pinpoint the source of the noise. So now I have a brand new engine from the oil pan up to the head. The car runs smooth with no unusual noises. The total cost of parts that the factory picked up was $3700. This included a new throttle body. The old one was damaged during the block swap. I still can't understand why a Honda engine with such low miles and proper maintenance could develop such a problem. I'm wondering if the fact that the car would sit for months at a time without being driven had anything to do with it ? I bought it in 2002 with 27k on it and in 4 years only put 8k on it. I intend to drive it at least once a week from now on.
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That could be.
It could also be that "stuff happens".
Take heart--Honda doesn't understand it, either. That's why they picked up the $3700 in parts.
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wrote:

I would guess that one of the reasons that Honda picked up the cost was probably the concern of "How many more like this are out there". Honda is very concerned when one of their "low mileage" engines develops a major problem and they are motivated to find if it's a one time problem or a sign of things to come fleet wise. My daughter's Civic with 55,000 miles developed a major oil usage problem--3qts in 150 miles--. Honda, authorized, and paid for a partial tear down (didn't fix it) and then a complete engine tear down. Her cost was limited to a few of the parts and she ended up with a "zero time".engine. MLD

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Jay Fowler wrote:

Without a detailed physical analysis nobody is ever going to know exactly what happened. It seems to me that Honda was more than fair to you by picking up the majority of cost of repair on your out a warranty 6-7 year old vehicle.
John
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