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checks on cylinder head-

Check for carbon adherent to ports and clean them. Check for scaling and corrosion in water jacket part. Conduct hydraulic test fro 7 bar or die penetration test. In valves check for sulphuric acid corrosion and bent valve seats. Check for high temperature corrosion on valve seats. check for adhered carbon and blow by. replace worn or bent valves. check for corrosion or crack in springs.
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