Rear Crankshaft Oil Seal for ISUZU 4HK1 Engine with High-Grade Synthetic Rubber and Direct Replacement

Precision-engineered rear crankshaft oil seal prevents engine oil leakage at the flywheel end, protecting the crankshaft and maintaining proper lubrication in ISUZU 4HK1 diesel engines.

• OE Quality: Manufactured to strict ISUZU dimensional and material specifications for perfect fit and function
• Precision Sealing Lip: Engineered to maintain consistent contact pressure for reliable oil retention
• Garter Spring Design: Ensures lip tension remains constant, compensating for minor wear and temperature fluctuations
• Durable Material: High-grade synthetic rubber provides excellent resistance to engine oil, heat, aging, and weathering
• Rust-Protected Casing: Metal casing is coated or treated to resist corrosion
• Contaminant Exclusion: Prevents dust and debris from entering the engine through the crankshaft opening
• Oil Retention: Prevents rear main oil leakage, avoiding oil loss and potential engine damage
• Protects Clutch/Flywheel: Prevents oil contamination of clutch components, ensuring smooth engagement
• Extends Engine Life: Proper sealing ensures consistent oil pressure and bearing protection
• Direct Replacement: Simple installation during engine rebuild or clutch service
• Cost-Effective Maintenance: Prevents expensive engine damage and repairs

This rear crankshaft oil seal is specifically designed for ISUZU vehicles and equipment equipped with the 4HK1 engine.

• ISUZU XD Series
• ISUZU NPR – Medium-Duty Trucks (NPR66, NPR70, NPR75)
• ISUZU NQR – Medium-Duty Trucks
• ISUZU FRR – Medium-Duty Trucks
• ISUZU FSR – Medium-Duty Trucks

• 4-Cylinder, Inline Diesel
• Displacement: 5.2L (5193cc)
• Turbocharged, Intercooled
• Valvetrain: DOHC (varies by application)
• Widely used in NPR, NQR, FRR, and XD series

Medium-duty trucks, buses, forklifts, generators, compressors, and various construction/agricultural equipment utilizing the 4HK1 engine.

Professional installation required. Proper procedure is critical for leak-free performance:

1. Remove transmission and clutch/flywheel – Safely remove the transmission and all components to access the rear crankshaft area
2. Remove the old seal – Carefully remove the old seal using a seal puller, avoiding damage to the crankshaft or housing
3. Inspect the crankshaft sealing surface – Check for scoring, pitting, or wear; polish or replace as needed
4. Clean the seal bore – Thoroughly clean the housing bore and remove all debris
5. Lubricate the new seal lip – Apply a thin coat of clean engine oil or assembly lube to the sealing lip
6. Position the new seal – Align the seal squarely with the housing bore (lip facing inward toward the engine)
7. Install the seal – Use a proper seal installer tool to press the seal evenly into the bore until fully seated at the correct depth
8. Inspect installation – Verify seal is squarely seated and at the correct depth
9. Reinstall flywheel/flexplate – Install the flywheel and torque to manufacturer specification
10. Reinstall clutch and transmission – Reassemble all components in reverse order
11. Refill engine oil – Check and top up engine oil to the correct level
12. Start and inspect – Start the engine and check for oil leakage at the rear of the engine
13. Road test – Test drive and re-inspect for leaks after the test

• Material Verification: Confirms rubber compound and metal composition meet OE specifications
• Dimensional Inspection: Inner diameter, outer diameter, and width verified against OEM tolerances
• Lip Geometry Check: Sealing lip profile and angle inspected for optimal sealing performance
• Garter Spring Tension: Spring force measured to ensure consistent lip pressure
• Hardness Testing: Rubber durometer tested to OEM standards for durability
• Visual Inspection: 100% checked for cracks, flash, molding defects, or damage
• Packaged Safely: Individually sealed to prevent contamination and protect the sealing lip during transit

• Neutral export packing or customized packaging available
• Carton or wooden case for safe transportation
• Fast delivery for stock items
• Shipping by Express Air or Sea

For pricing, availability, or bulk purchase of the Rear Crankshaft Oil Seal 8972093423 8-97209342-3 For ISUZU 4HK1 Engine XD, please contact our sales team for a competitive quote and expert technical support.