how to find flatness of head and cylinder mating surfaces

Kilpatrick · Jun 23, 2017

i have a 1997 fe501e with a head gasket leak. I found water in the oil and changed the head gasket and now have antifreeze coming out of the head gasket. How do I check to see if the head cylinder is flat and if it's not flat what should i do to fix the leak?

bushmechanic · Jun 23, 2017

Get some wet/dry sandpaper about #400 grit
Put it on a flat surface like a machine table or a thick peice of glass
You can check the surface with a straight edge

Then put the head on the sandpaper with gentle pressure and move it gently in figure 8 movements

Then have a look. The shiny bits were protruding more than the others

Keep going till it's all shiny

Do the same to the top of the barrel

how to find flatness of head and cylinder mating surfaces

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