490BT Engine Valve for Xinchai Repair Parts – Diesel Engine Valve

Product Details

Product Overview

This 490BT Engine Valve is a high-quality replacement part specifically designed for Xinchai engine repair applications. Manufactured by, this diesel engine valve meets OEM size specifications, ensuring a precise fit and reliable performance in demanding industrial environments.

Ideal for use in construction machinery, agricultural equipment, generator sets, marine applications, and material handling equipment, this valve is a critical component for maintaining engine compression and combustion efficiency. The 490BT model is widely recognized in the aftermarket for its durability and compatibility with Xinchai engine platforms.

Each valve undergoes rigorous outgoing inspection, with video evidence provided to confirm quality standards. Whether you are a distributor, workshop, or fleet manager, this part offers a cost-effective solution for engine overhauls and routine maintenance.

Key Features & Benefits

• OEM Size Precision: Manufactured to original equipment specifications for exact fitment and reliable sealing performance.
• Diesel Engine Optimized: Designed specifically for diesel combustion cycles, ensuring heat resistance and long service life under high compression.
• Comprehensive Quality Control: Machinery test report and video outgoing inspection provided with every order for full traceability.
• Versatile Application: Suitable for construction, agriculture, genset, marine, and material handling equipment using Xinchai 490BT engines.
• Global Ready Packaging: Secure plastic bag, box, and carton packaging suitable for international shipping and warehousing.
• 6-Month Warranty: Backed by a half-year warranty and online technical support for post-purchase assistance.
• Lightweight Design: Only 1 kg per valve, reducing shipping costs while maintaining robust construction.

Technical Specifications

OEM Cross-Reference

This 490BT Engine Valve is designed as a direct replacement for original Xinchai engine components. While specific OEM part numbers may vary by engine variant, the following cross-reference information applies:

• Xinchai 490BT Series: All intake and exhaust valves for this engine family
• Compatible OEM Numbers: Consult your engine manual or contact our support for exact OEM number matching (e.g., Xinchai valve part numbers typically start with “490BT-…” or “100-…”)
• Alternative Part Numbers: This valve may also serve as a replacement for other 490-series diesel engine valves from Chinese manufacturers (e.g., Yuchai, Quanchai) – please verify dimensions before ordering.

Note: For exact OEM cross-reference, please provide your original valve part number or engine serial number. Our technical team can confirm compatibility within 24 hours.

Compatibility

This 490BT Engine Valve is commonly used for the following applications:

• Engine Models: Xinchai 490BT diesel engine series
• Equipment Types: Excavators, loaders, forklifts, tractors, generators, marine engines, and industrial pumps
• Industries: Construction, agriculture, power generation, marine, and material handling

Important Fitment Note: Compatibility is inferred based on the engine model designation. Always verify valve stem diameter, overall length, and head diameter against your original part before installation. provides technical drawings upon request to ensure accurate fitment.

Global Supply & Distribution

maintains a robust global supply chain to serve B2B customers worldwide. Our export capabilities include:

• Worldwide Shipping: We ship to all major regions including North America, Europe, Southeast Asia, Middle East, Africa, and Oceania.
• Fast Delivery: Express shipping options available to major ports and industrial centers (e.g., Rotterdam, Dubai, Singapore, Los Angeles, Shanghai).
• Volume Orders: Bulk packaging and container loading (FCL/LCL) available for wholesale buyers.
• Trade Compliance: All shipments comply with international trade regulations, with full documentation (commercial invoice, packing list, certificate of origin) provided.
• Lead Time: Typical processing time is 3-7 business days for stock items; larger orders may require 10-15 days.

Quality Assurance

Every 490BT Engine Valve is manufactured under strict quality control protocols to ensure consistent performance:

• Manufacturing Standards: Produced in ISO-certified facilities in Guangdong, China, using precision forging and heat treatment processes.
• Testing: Each valve is tested for dimensional accuracy, surface hardness, and sealing integrity. Machinery test reports are available upon request.
• Inspection: Video outgoing inspection is provided for every order, allowing you to visually confirm quality before shipment.
• Warranty: 6-month warranty against manufacturing defects. After-warranty online support is available for troubleshooting and technical guidance.
• Traceability: Batch numbers are recorded for full traceability from raw material to finished product.

FAQ

Q1: How do I confirm this 490BT valve fits my Xinchai engine?

A: To ensure proper fitment, measure your original valve’s stem diameter, overall length, and head diameter. The 490BT valve is manufactured to OEM specifications for the Xinchai 490BT engine series. If your engine model differs (e.g., 490B, 490D), please contact our support team with your engine serial number or original part number for verification. We can provide dimensional drawings upon request.

Q2: Is this valve suitable for both intake and exhaust applications?

A: This listing is for a single engine valve. While the 490BT engine typically uses the same valve for both intake and exhaust ports, we recommend ordering one valve as a sample to confirm compatibility with your specific application. For complete engine overhauls, we suggest purchasing a full set of valves (typically 8 valves for a 4-cylinder engine) to ensure uniform wear and performance.

Q3: What maintenance is recommended after installing this valve?

A: After installation, perform a valve clearance adjustment according to the Xinchai 490BT engine manual (typically 0.25-0.30 mm for intake and 0.30-0.35 mm for exhaust). Run the engine at idle for 10-15 minutes, then re-torque the cylinder head bolts to specification. Check for any abnormal noise or exhaust leakage. We recommend replacing valve stem seals simultaneously for optimal performance and oil control.