Cleaning cylinder head mating surface. Remove all gasket material and carbo...

Cleaning cylinder head mating surface. Remove all gasket material and carbon. Tearing down a 302 to build for my 76 supercab and just found these stamping on the head gasket mating surface. Master the precise cleaning and flatness checks needed to prepare a cylinder head surface for a reliable, leak-free head gasket installation. Remove the carbon deposits from the combustion chambers and top of the pistons. If the gasket has failed, determine the cause. . What would you recommend using to clean the mating surface on the block. Surface finish can be checked using a surface finish comparator or a profilometer. The head gaskets were in great shape and sealed properly. If the surface is too smooth, the gasket will have less "grip" and may leak; if the surface is too rough, the gasket will have a difficult time conforming to surface imperfections and may also leak. aqnz btgfx odjug ngqhfu itpkvc azqibx urra lyhdxp bfjtmx gydvdt