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actually your information is wrong. Pin clearance from a floating pin bore in a forged piston is tighter from the factory than it is from a press pin style from Nissan. That is why you must hone the pin bores. I hone my to a specified clearance depending on the use of the engine. I've pulled many engines apart and the evidence of wear is significantly lower than if you don't hone the piston pin bore. Its these attributes that I do to the engines that ultimate allow the engines to run smoother and better. The movement of the pin is the critcal variable. Its not just the pin bore in the rod that you should be focusing on. Just like piston rings and lifters...they all rotate/spin. The pin is no different, when you go to assembly and the pin does NOT spin inside the pin bore of the piston once assembled to the rod you will absolutely have premature wear issues down the road. It is very vital that you leave NO area of two parts that are in a dynamic environment untouched. Everything must be made more effecient at all times.
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