6BT Engine Valve Stem Seal 3921640 Diesel Engine Spare Parts

Keywords: 3921640, Valve Stem Seal, 6BT Valve Oil Seal, cumm-ins 6BT Engine Parts, Excavator Diesel Spare Parts, Engine Gasket Repair Accessories

Product Overview

The valve stem seal 3921640 is a critical sealing component specially made for cumm-ins 6BT diesel engine. Installed on intake and exhaust valve stems, it accurately controls lubricating‑oil flow to the valve guide, prevents excessive engine oil from leaking into the combustion chamber. It effectively solves common engine failures such as oil‑burning, blue exhaust smoke, valve carbon deposits and poor sealing performance. This aftermarket replacement part is ideal for cylinder‑head maintenance, valve system repair and full engine overhaul for excavators, heavy‑duty trucks and construction machinery equipped with 6BT engines.

Detailed Specifications

Key Features & Advantages

• Exact OEM‑Matching Installation Precision‑machined dimensions, perfectly fit valve stem and valve guide, direct installation with no extra modification required.
• Premium High‑Temperature‑Resistant Fluororubber Material Excellent heat‑resistance, oil‑resistance and anti‑aging performance, keeps stable sealing effect under the long‑time high‑temperature working environment of cylinder head.
• Reliable Sealing Performance Uniform elasticity, effectively prevent oil leakage, eliminate blue smoke exhaust and reduce engine oil consumption.
• Strict Multi‑Step Factory Quality Inspection Every batch of valve stem seals undergoes dimension measurement, hardness test and high‑temperature oil‑soaking aging inspection before delivery.
• Cost‑Effective Engine Maintenance Solution Replace damaged valve stem seals on time to avoid secondary damage such as carbon accumulation on valves, pistons and cylinder liners.

Application Scope

Compatible Equipment List: ‑ cumm-ins 6BT Diesel Engine ‑ Excavators, heavy‑duty trucks, generators and construction machinery fitted with cumm-ins 6BT engine requiring part number 3921640

Our Company Advantage

We are a professional supplier of comprehensive excavator and heavy‑duty machinery spare‑parts. We provide valve stem seals, full gasket kits, cylinder‑head spare‑parts, piston kits, fuel injectors, oil pumps, water pumps, sensors, solenoid valves, hydraulic spare‑parts and engine overhaul kits for cumm-ins, Komatsu, Cater-pillar, Kobelco, Hyundai, Hitachi, Doosan, Sany, Isuzu and other well‑known machinery brands. ‑ Large ready‑to‑ship inventory for engine sealing spare‑parts ‑ Factory‑direct competitive wholesale price ‑ Mixed‑order & one‑stop spare‑parts procurement supported ‑ Professional part‑number matching technical support service

Packaging & Shipping

• Inner sealed plastic bag + foam shock‑absorbing protection, prevent dust, moisture and scratches
• Outer reinforced export carton to avoid damage during long‑distance sea & land transport
• Multiple shipping options: sea freight, air freight, international express for small trial orders
• Export documents including Commercial Invoice, Packing List are available

Contact Us

If you need more cumm-ins 6BT series engine sealing parts, overhaul accessories or other heavy machinery replacement spare‑parts, please send your parts list over to us. We will offer you our best quotation promptly.