Yanmar 129100-11130 Exhaust Valve Set

This exhaust valve set contains four valves designed for the Yanmar 4TNV84 naturally aspirated diesel engine (1.995 L displacement, 84 mm bore). Each valve is manufactured from heat-resistant alloy steel to withstand exhaust gas temperatures and maintain sealing integrity under continuous heavy-duty cycles. The set corresponds to OEM part numbers 129100-11130 and 129100-11112, providing direct interchangeability for cylinder head overhaul procedures. Valve geometry follows the 4TNV84 cylinder head specification with a 45-degree seat angle, stem diameter approximately 7 mm, and head diameter in the 31-34 mm range typical for this engine series. The valves are compatible with engine variants including 4TNE84, 3TNV84, and 3TNE84, and serve applications in compact construction equipment, agricultural tractors, and industrial power units where the 4TNV84 engine is installed.