Oil Cooler Case 8-94114588-0 8941145880 For ISUZU NKR 4JB1 Diesel Engine

The Oil Cooler Case (OEM Numbers: 8-94114588-0 / 8941145880) is a premium-quality, direct replacement engine component designed specifically for ISUZU NKR series light-duty trucks equipped with 4JB1 diesel engines. This critical part encloses the oil cooler core, provides the mounting surface for the oil filter assembly, and forms the housing that connects the oil cooler to the engine block.

• OE Quality: Manufactured to strict ISUZU dimensional and material specifications for perfect fit and function
• Precision-Cast Construction: High-strength aluminum alloy housing provides durability and dimensional accuracy
• Accurate Mating Surfaces: Precision-machined sealing surfaces ensure a leak-proof fit when properly installed
• Protects Oil Cooler Core: Encloses and protects the oil cooler core from damage and contamination
• Mounting Provisions: Provides correct mounting points for the oil filter assembly and oil cooler core
• Restores Oil Cooling Function: Eliminates oil leaks and overheating caused by a cracked or warped case
• Direct Replacement: Matches OE case dimensions, bolt pattern, and sealing configuration
• Long Service Life: Engineered for commercial diesel engine applications
• Cost-Effective Repair: Affordable replacement that prevents costly engine damage

This oil cooler case is specifically designed for ISUZU light-duty trucks and commercial vehicles:

• ISUZU NKR (Light-Duty Trucks)
• ISUZU NHR, NPR series (as applicable)
• ISUZU TFR (Pickup Truck)
• ISUZU D-MAX (Pickup Truck)

• ISUZU 4JB1 Engine: 4-Cylinder, Inline Diesel, 2.8L Displacement, OHV Valvetrain
• ISUZU 4JB1T Engine: 4-Cylinder, Inline Turbo Diesel, 2.8L Displacement

1. Ensure engine is cool - Allow the engine to cool completely before disassembly
2. Disconnect battery - Always disconnect the negative terminal before working
3. Drain engine oil - Drain the engine oil into a suitable container
4. Remove the oil filter assembly - Unscrew or unbolt the oil filter from the oil cooler case
5. Remove the old oil cooler case - Unbolt the case from the engine block; carefully separate it from the gasket
6. Clean all mating surfaces - Thoroughly clean the engine block and case mating surfaces; remove all old gasket material and debris
7. Inspect the oil cooler core - Check the core for damage, corrosion, or blockage; replace if necessary
8. Install new gasket - Position a new gasket or O-ring on the engine block or case as specified
9. Install the new oil cooler case - Position the case on the engine block; align bolt holes
10. Install mounting bolts - Hand-start all bolts; tighten in a criss-cross pattern to manufacturer torque specifications
11. Reinstall the oil filter assembly - Install the oil filter and tighten to specification
12. Refill with engine oil - Fill with the correct grade and quantity of engine oil
13. Start and test - Start the engine; check for oil leaks around the case and filter area
14. Check oil pressure - Verify proper oil pressure and check for warning lights
15. Road test - Test drive to verify proper engine operation and no leaks

• Material Verification: Confirms aluminum alloy composition meets ISUZU strength and durability specifications
• Dimensional Inspection: Case dimensions, bolt hole pattern, and sealing surface flatness verified within OEM tolerances
• Surface Finish Inspection: Mating surfaces checked for proper finish to ensure leak-proof sealing
• Pressure Testing: Sample tested to ensure integrity under operating oil pressure
• Visual Inspection: 100% checked for casting defects, cracks, or machining flaws
• Packaged Safely: Protected and packaged to prevent damage 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