Quote:
Originally Posted by sixto
The protrusion spec calls for a measurement of the piston crown above the deck at the very front and very back of the piston (along the pin axis). In the 3.0 block there is almost 1mm front and back. In the 3.5 block there is about 1mm in the back and no protrusion in front. That suggests that the rod is bent forward.
|
This measuring technique would indicate whether the rod bends around an axis that is transverse to the axis of the engine. This mode of bending seems rather strange to me.
The typical bend of a connecting rod in a gasser is around the axis of the engine. When the rod is at an angle to the piston (nearly all the time), the loading on the rod is not symmetrical and it's failure mode will cause it to compress and twist relative to the engine axis.
Anyone have information as to whether this is true in the 603.97?