Gents,

This is the first time I have looked at the inside of a front cover.  Are
these "cracks" normal?  Or did my part get stressed somewhere along the line
and now I need a new cover?

Chris
 

 

Those are called foldovers and occlusions, and are typical of permanent mold aluminum injection molding. The mold temperature may have been a bit low for this shot, and subsequent shots would have had fewer such imperfections. Ultrasound inspection would reveal any actual discontinuities.

 

Lynn E. Hanover

 

My AOL people went on break during transmission, and the draft went out. Sorry.