It seems like everyone has their own ideas regarding this procedure but it
all of the results are either positive or theoretical. I have tried
something that didn't work. In the old flat head days I thought it would be a
good
idea to use valve grinding compound for engine assembly, the idea being to
smooth the metal and reduce friction. In every motor the horsepower started
immediately diminishing after start up until the engine came apart. I tried
different grades of grit but experienced the same results. I eventually
switched to a Chrysler hemi and Valvoline 50 weight for assembly and got much
more
power and engine life.
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