Quote:
Originally Posted by mact3333
and I bet your dealer also said it happened on DCT cars too...  ...simple, over-rev--->top end failure...rod bearing/oil starvation---> bottom end failures. |
Generally true, but not always that simple. Example: take an engine that can handle 9000rpm and stroke it. The top end can still handle 9000rpm, but the bottom end probably won't last, all else being equal.
~10 years ago, over-rev'd stock 993 TT's were as likely to stretch rod bolts (killing bearings) as they were to bend a valve. Today bent valves are more likely, thanks largely to 10 years worth of valve spring fatigue... (NA 993s have higher compression/less valve clearance and almost always kill valves)