Dtr mileage
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Crank and bearing looked/felt fine, never bothered to split it and take a proper look though. Not sure why it went, whether it was due to age ect. Although the wrist pin and small end bearing were VERY worn. It took a right big chunk out of the piston and most of it went out of the exhaust port.
Since I had the top end sorted it has been running like a dream.
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@pjt95 Ah ryt, you did get it rebored then. That's good news.
Rule of thumb, these engines, 30K on the bottom end. I'd say that's really when you should consider pulling the motor for a rebuild.
Now then can and will do more than that, it's just it is cheaper to rebuild the engine, than it is to replace the crank cases. So well worth doing before it goes.
The key thing is, sound. It should start to knock at idle. But when you do a ring change, just check the tolerances. There is no need to split the cases to check these things so that's a moot point.
Regardless of miles, you should always check the bottom end. Since the top end is reliant on the bottom end. Always worth replacing if in doubt.
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Bottem end lasts for ages on theese things.
