Quote:
Originally Posted by redpriest
Any track time for those with high mileage and on original bearings?
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Firstly this is a scatter graph of the 55 (non supercharged) engine failures reported on M3post.
Whats worth noting is that once you have passed 50-60K miles the trend is for less failures...ie if you were unlucky enough to be in the 1 to 1.5% of owners to have a car with some sort of bearing clearance problem it will tend to fail at relatively low miles.
The other factor is how you use the car.
Anything that puts a high load on the engine will tend to put a high load on the bearings. Such as supercharging, aggressive ECU tune, tracking etc.
If you are mechanically sympathetic with you car, warm it up carefully, no high revs with cold or very hot oil etc then there is every reason to be optimistic.