123900-01340 Head Gasket for Yanmar 4TNE106One New Aftermarket Replacement Head Gasket for Yanmar 4TNE106 Diesel Engine This aftermarket replacement cylinder head gasket seals the mating surface between the cylinder head and engine block on Yanmar 4TNE106 series diesel engines. A properly sealed head gasket is critical for maintaining combustion pressure and preventing leaks of oil, coolant, and combustion gases. This part is suitable for engine rebuilds, overhaul projects, and head gasket