| Oh man, is this for real?
Larry Hoy
> -----Original Message-----
> During manufacture, because of accuracy limitations on the 
> production machines it was not possible to get the diameter 
> of the cylinder boring exactly "right". It was possible 
> however to quickly measure the finished diameter and grade 
> each cylinder according to how much it varied from the 
> nominal bore. This grading was then stamped on the top of the 
> block along side each cylinder.
> 
> Pistons were similarly graded and stamped.
> 
> At the assembly stage, piston and cylinder grades were 
> matched to get the best possible fit.
> 
> Cheers
> Ian F
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