4003966 Valve Stem Seal (SEAL,VALVE STEM) is a vital sealing part installed on valve stem guide for CUMMINS series diesel engines. It moderately limit lubricating oil flowing down along valve stem into cylinder, avoid excessive engine oil combustion. Cooperate with valve stem guide to guarantee normal gas exchange of engine.
This valve stem seal solves typical faults such as engine burning oil, blue smoke from exhaust, carbon accumulation and increased oil consumption caused by seal aging, hardening and loss of elasticity.
Core Product Advantages
Premium High-Temperature Resistant Rubber Material
Special composite rubber formula, maintain elasticity under long-term high temperature environment, not easy to harden, crack or deform.
Precision Lip Design
Reasonable sealing lip structure, realize quantitative oil control, balance lubrication and oil sealing effect.
Low Friction Performance
Reduce abrasion between seal and moving valve stem, extend service life during high-frequency reciprocating motion.
Excellent Aging & Corrosion Resistance
Resist erosion of high-temperature waste gas and engine oil, adapt to harsh working environment inside cylinder head.
Stable Size Consistency
Strict dimensional tolerance ensures tight assembly fit, avoid oil leakage caused by assembly clearance.
Standard Matching Specification
Dimension 1cm1cm1cm, weight 0.002KG, perfectly fit supporting CUMMINS engine cylinder head assembly, direct replacement.
Strict Factory Quality Inspection
All valve stem seals pass elasticity test and tightness inspection, stable batch quality for engine overhaul factories and engineering fleets bulk procurement.
Basic Product Parameters
Part Number: C4003966
English Name: SEAL, VALVE STEM
Product Name: Valve Stem Seal / Valve Oil Seal
Applicable: For CUMMINS Series Diesel Engines
Overall Dimension: 1cm 1cm 1cm
Product Weight: 0.002KG
Core Function: Control lubricating oil inflow into cylinder, prevent burning oil and exhaust blue smoke
Key Features: High temperature resistant, elastic, anti-aging, low friction, reliable sealing
Installation Position: Engine cylinder head, valve stem guide
Package: Neutral export carton, separate packaging to avoid extrusion deformation of sealing lip
Application Scenarios
Suitable for heavy-duty trucks, construction machinery, mining vehicles and diesel generator sets equipped with CUMMINS diesel engines. Adapt to long-distance full-load transportation and continuous high-intensity working conditions. Effectively reduce engine oil consumption and eliminate blue smoke exhaust after replacement.
Purchase Reminder
Please confirm part number C4003966 and corresponding CUMMINS engine model before ordering to ensure complete compatibility. We support global bulk wholesale for auto parts distributors, engine overhaul workshops and transport fleets with sufficient stock and competitive prices. Professional installation tips will be provided after purchase.
