GLASS BEADING INSIDE OF VALVE COVERS AND OIL PANS

CFD244 said

Hi Folks

Can any one advise if there is a coating or treatment on the inside of OEM valve covers and oil pans? I would like to know if the insides should be glass beaded when I do the outsides. I have a tiny bit of surface rust that needs to be dealt with. Thanks.

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I ruined an engine once by bolting on an aluminum intake that had been blasted with glass beads. I cleaned it and blew it out prior to install, but somehow some still ruined the engine in less than 250 miles. Don't know if high pressure somehow embedded it into the aluminum and heat from the engine helped release it or what.