Valve Stem Oil Seals For Komatsu 3D84-3 Diesel Engine PC30-7 Excavator

• Engine Model: Komatsu 3D84-3
• Product Name: Valve Stem Oil Seal / Valve Oil Seal
• Quantity: 6 Pcs per set (matches 3D84-3 3-cylinder engine intake & exhaust valves)
• Applicable Equipment: Komatsu PC30-7 Mini Excavator, small loaders and generators powered by 3D84-3 engine
• Material: High temperature resistant fluororubber with spring retainer
• Structure: Inner self-tightening spring structure
• Core Function: Limit engine oil from flowing down along the valve stem into the combustion chamber, reduce excessive oil burning, eliminate blue smoke from exhaust, protect spark plugs and cylinder components

1. Exact size customized for 3D84-3 engine intake and exhaust valves, tight fit without loose clearance.
2. Fluororubber material features outstanding heat resistance and oil resistance, not easy to harden or crack under long-term high exhaust temperature.
3. Built-in stainless steel garter spring keeps constant compression force on the valve stem, stable sealing performance during reciprocating movement.
4. Standard matching quantity for one full engine overhaul, convenient for one-time replacement.

These valve stem oil seals are dedicated consumable sealing parts for Komatsu 3D84-3 diesel engine, 6 pieces form a complete set for all 3 cylinders (3 intake valves + 3 exhaust valves). Failed valve stem seals will lead to engine oil entering the cylinder for combustion, resulting in blue smoke at exhaust outlet, rising oil consumption and carbon deposit accumulation inside the engine. They must be replaced synchronously when disassembling cylinder head, replacing valve guides or doing full engine overhaul. All products pass dimensional inspection and high-temperature aging test before delivery.

We supply parts for Kubota, Cumm ins, CAT, Perkins, Yanmar, Isuzu, Komatsu, Mitsubishi, Hino, Nissan, Vol vo, Deutz, Doosan, Daewoo, John De ere, Scania, Hyundai, JCB etc.