| Message: | | My situation: 2002 M3 coupe October build. Happened at ~3800 miles. Nothing really special when it happened, I was accelerating in 3rd pretty hard and when I backed off I noticed a loud ticking. Car was brought into service and they determined that a connecting rod bearing had gone. It was the #1 cylinder bearing so they did not believe it to be a systemic oil system failure (per the service tech the #6 cylinder bearing is the furthest from the oil pump and would be first to fail if the oil pump and/or low oil caused lack of circulation).
My car is an SMG so over reving was not possible. Given that there was bottom-end damange w/o any top-end damage, I don't think they would have suspected over rev anyway.
At first they were going to just replace the crankshaft, connecting rod and bearing. However my dealer (Allison BMW in Mountain View, CA) was concerned that the could not get all the metal shavings out of the system. Per my dealer, BMW has a policy that if the cost to repair is < 75% the cost of a replacement engine the dealer is instructed to repair vs. replace. Fortunately for me, my dealer worked up a > 75% estimate by working in the labor cost to dismantel and clean out most of the engine. The result a new engine. Car was in the shop for about 6 weeks. I talked to BMW regional rep ans was able to get them to foot the bill for a rental during the repair period. Hopefully the new engine works out better...
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