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Hi all, After measuring my valve clearance with a feeler gauge the exhaust cleanse is under at .006” (spec is between .007-.009”). I couldn’t get a good reading on the intake side because it was so tight (spec is between .005-.007). My question is how critical is it to have a gap? And what...

Hi all, I am restoring an old b&s engine and during the inspection I found pitting/ corrosion in the valve chambers (see attached pics). Should I ignore it and push on or will this pose problems later if left unfixed?