CAT 3406 Valve Stem Oil Seal Set For CAT 3406 Diesel Engine

• Brand: CAT
• Model No.: 3406
• Product Name: Valve Stem Oil Seal / Valve Oil Seal
• Color: Beige
• Material: High temperature resistant fluorine rubber (FKM) with built-in stainless steel tension spring
• Quantity: 24 pieces per full set
• Application: CAT 3406 inline six-cylinder diesel engine, used on CAT excavators, loaders, generators, heavy trucks and industrial stationary power units

1. Premium FKM fluorine rubber material, outstanding resistance to high temperature, engine oil corrosion, aging and abrasion, stable performance under long-time heavy load working conditions
2. Built-in circular stainless steel garter spring, the sealing lip closely fits the valve stem, effectively blocks engine oil from flowing into the combustion chamber, eliminates blue exhaust smoke and excessive oil consumption
3. Precision OEM dimension, perfect matching with CAT 3406 engine valve guide, direct press-fit installation without trimming or modification
4. Matches perfectly with CAT 3406 O-ring seal kit for complete engine top overhaul, greatly improve the overall sealing reliability of CAT 3406 power unit

This CAT 3406 valve stem oil seal is a critical wearing sealing component installed on the valve guide of CAT 3406 diesel engine. It controls the lubricating oil dosage on the valve stem, prevents lube oil from being burned inside cylinders, and resolves common faults including blue smoke during acceleration, frequent oil shortage and carbon deposit accumulation in combustion chambers caused by deteriorated old seals.

It is a mandatory replacement part during cylinder head disassembly and full engine rebuild for CAT 3406 equipment, and should be replaced together with cylinder head gasket, injector O-rings and other upper engine sealing components.

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

Shipping: Sea freight, air freight and international express are all available. Goods will be arranged for shipment promptly after payment confirmation.

Tax Notice: All import duties and local destination taxes shall be borne by the buyer. Please verify local customs regulations in advance.

1. How many valve oil seals does CAT 3406 engine need?

   CAT 3406 engine has 6 cylinders with total 24 valves (12 intake + 12 exhaust), one full overhaul set requires 24 valve stem oil seals, consistent with the quantity shown in the picture.

2. What symptoms indicate failed valve stem oil seals on CAT 3406?

   Obvious blue smoke when cold starting or revving up, engine oil level drops rapidly without external leakage, severe carbon buildup on piston top and exhaust manifold.

3. Professional installation tips

   Use a dedicated valve spring compressor tool to avoid scratching the seal lip; apply a thin layer of clean engine oil on the inner hole before pressing in to protect the sealing edge.