Yanmar 129100-11112 Exhaust Valve Set

This exhaust valve set contains four valves designed for the Yanmar 4TNV88 2.19L four-cylinder diesel engine. The valves are manufactured to OEM specifications for heat resistance, stem wear resistance, and seat sealing integrity under continuous heavy-duty cycles. The set directly replaces Yanmar part numbers 129100-11112 and 129100-11130. It fits engine variants including 4TNV88-BDHQ, 4TNV88-BDSA, 4TNV88-DSA, and 4TNV88-GGE. Cross-compatibility extends to Komatsu 4D88E, 4D88E-6, and 4D88-6 engines used in PC45MR-3, PC55MR-3, and PC58UU-3 mini excavators, as well as Hitachi ZX40U-2 and ZX50U-2 models. Each valve features an 8 mm stem diameter and is precision ground for the 88 mm cylinder bore. The 45-degree seat angle ensures optimal heat transfer and compression retention. The package includes four exhaust valves only; intake valves, guides, springs, and seals are sold separately.