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Genuine Sinotruk HOWO 082V04902-0007 Valve Rod Sealing Sleeve
This authentic Sinotruk HOWO valve rod sealing sleeve (Part No: 082V04902-0007) is precision-engineered to exact OEM specifications, ensuring optimal engine performance and longevity for HOWO trucks. Designed for heavy-duty applications, this critical seal component prevents oil leakage along the valve stem while maintaining proper lubrication and preventing contamination from entering the valve guide system. The advanced composite material construction provides excellent resistance to high temperatures, engine oils, and wear, ensuring reliable sealing under extreme operating conditions. Ideal for engine overhauls and maintenance, this sealing sleeve is an essential replacement component for maintaining engine efficiency and preventing costly oil leaks.
Technical Specifications:Material:
High-grade nitrile rubber (NBR) with steel reinforcement
Inner Diameter: 8.5 ± 0.05 mm
Outer Diameter: 16.0 ± 0.05 mm
Length: 25.0 ± 0.1 mm
Temperature Resistance: -40°C to +200°C continuous operation
Pressure Rating: Withstands up to 5 bar pressure
Compatibility: HOWO A7, T7H series with WEICHAI WP10/WP12 engines
Surface Finish: Precision molded (Ra ≤ 0.8 μm)
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Installation Notes
Pre-Installation Checklist:
1.Component Inspection: Verify part number (082V04902-0007) and check for damage or deformation
2.Cleanliness: Ensure valve guide and stem are free of debris, carbon deposits, and old seal material
3.Surface Check: Examine valve stem for scratches or wear that could compromise new seal
4.Lubrication: Apply clean engine oil to seal lip and valve stem before installation
Installation Steps:
1.Old Seal Removal: Use proper seal removal tool to extract old seal without damaging valve guide
2.Seal Orientation: Position new seal with spring side facing downward toward valve spring
3.Installation Tool: Use appropriate seal installation sleeve or socket to drive seal evenly into place
4.Depth Verification: Ensure seal is seated at correct depth (flush with guide housing)
5.Stem Insertion: Carefully insert valve stem through new seal to avoid damaging sealing lip
Critical Warnings:
Never reuse old sealing sleeves - always replace with new components
Avoid twisting or stretching seal during installation
Ensure valve stem is free of burrs or sharp edges that could damage seal lip
Do not lubricate seal after installation - pre-lubrication is sufficient
Post-Installation:
Start engine and monitor for oil leaks around valve cover area
Check oil level and top up if necessary after initial operation
Re-inspect after first 50 hours of operation for any signs of leakage
