OEM Fit Aluminum Alloy Oil Cooler Cover for ISUZU 4BD1 4BE1 Engines - Engine Oil Cooler Housing
Basic Properties
Place of Origin:
CHINA
Brand Name:
YIMI
Certification:
ISO/TS16949
Model Number:
NPR 4BD1 4BE1
Trading Properties
Minimum Order Quantity:
20 PCS
Price:
Negotiable
Payment Terms:
T/T
Supply Ability:
10000 pcs/month
Specifications
| Material: | Metal (Aluminum Alloy / Cast Iron) | Oil Cooler Bolt Torque: | 20 N·m (15 Ft-lbs) |
| Engine Oil Bolt Torque: | 19 N·m (1.9 Kg·m / 14 Lb·ft) | Net Weight: | 1.38 Kg |
| Package Dimensions: | 47.5 × 16 × 5 Cm | Cooling Type: | Engine Coolant Circulation |
| Surface Treatment: | Corrosion-resistant | Mounting Flange: | Precision-matched |
| High Light: | OEM Fit Oil Cooler Cover,Aluminum Alloy Engine Oil Cooler Housing,4BD1 4BE1 Compatible Oil Cooler Housing |
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Product Description
ISUZU NPR 4BD1 4BE1 Oil Cooler Cover 8-94438355-0 8944383550 OEM Fit
Oil Cooler Cover 8-94438355-0 8944383550 for ISUZU NPR NKR ELF 4BD1 4BE1 4BG1 — Verified OEM Fit Engine Oil Cooler Housing
The Oil Cooler Cover with OEM numbers 8-94438355-0 and 8944383550 is a verified direct-fit replacement for ISUZU NPR / NKR / ELF / N-Series light and medium-duty trucks equipped with 4BD1 / 4BE1 / 4BG1 / 4BC2 diesel engines. This oil cooler cover is a critical engine cooling system component that houses and protects the oil cooler element, ensuring proper engine oil temperature regulation and reliable lubrication under all operating conditions.
Working Principle
The oil cooler cover (also called oil cooler housing) serves as the protective enclosure and mounting base for the engine oil cooler element. It channels coolant flow around the oil cooler core, enabling heat exchange between the hot engine oil and the cooler coolant. The cover also provides sealed passages for oil inlet and outlet connections, maintaining proper oil pressure and flow through the cooling circuit.
Failure Symptoms
- Engine oil leakage around the oil cooler area — visible oil traces on the cover surface, mounting flange, or surrounding engine components.
- Coolant seepage at the cover joint — coolant mixing with engine oil or external coolant leaks at the cover-to-block mating surface.
- Engine overheating — a cracked or deformed cover prevents proper coolant flow around the oil cooler, reducing heat exchange efficiency.
- Oil contamination with coolant — internal cover failure allows coolant to enter the oil circuit, creating a milky emulsion in the engine oil.
- Visible cracks, deformation, or corrosion on the cover — structural damage reduces sealing integrity and can lead to catastrophic coolant or oil loss.
Critical Inspection Note: ISUZU service manuals require that when the oil cooler cover is removed, all gaskets and O-rings must be replaced with new units. The cover mounting surface must be perfectly clean and flat before installation. Always torque the cover bolts to the specified value in the correct sequence to prevent warping and ensure a leak-proof seal.
Product Specifications
| Verification Item | Data / Standard | Source / Method |
|---|---|---|
| Part Number (Short) | 8-94438355-0 | ISUZU OEM Parts Database |
| Part Number (Long) | 8944383550 | ISUZU OEM Parts Database |
| Part Name | Oil Cooler Cover / Oil Cooler Housing | ISUZU EPC |
| Vehicle Models | ISUZU NPR / NKR / ELF / N-Series / EX100 / EX120 / EX150 | ISUZU application catalog |
| Engine Compatibility | 4BD1 / 4BE1 / 4BG1 / 4BC2 | ISUZU application catalog |
| Material | Metal (Aluminum Alloy / Cast Iron) | Product specification |
| Net Weight | 1.38 kg | Yishan Auto Parts specification |
| Package Dimensions | 47.5 * 16 * 5 cm | Yishan Auto Parts specification |
| Origin | Japan / China Aftermarket | Product specification |
| Certification | ISO/TS 16949 | Third-party system audit |
OEM Cross-Reference
| Type | Number |
|---|---|
| Primary OEM — Short | 8-94438355-0 |
| Primary OEM — Long | 8944383550 |
| Alternate Format | 8-94438-355-0 |
| Related OEM | 8-94438371-0 / 8944383710 |
| Related OEM | 8-94438371-1 / 8944383711 |
| Related OEM | 8-94438371-2 / 8944383712 |
| Related Gasket | 8972333023 |
| Related Gasket | 5112820110 |
Platform Note: The 8-94438355-0 and 8-94438371-0 are closely related oil cooler cover assemblies for the ISUZU 4BD1/4BE1 engine family. The 8-94438371-0 is the primary oil cooler cover assembly, while the 8-94438355-0 is the housing/cover component. Both are used across ISUZU NPR/NKR and Hitachi EX-series applications. Confirm your exact OEM number before ordering.
Part Number:
8-94438355-0 8944383550
Product Name:
Oil Cooler Cover
Car Model:
NPR
Engine Model:
4BD1 4BE1
Condition:
100% Brand New
Origin:
China Mainland
Vehicle & Engine Compatibility
Primary Applications
| Brand | Model | Chassis | Engine | Years |
|---|---|---|---|---|
| ISUZU | ELF 250 | NKR | 4BD1 / 4BE1 | 1982–2007 |
| ISUZU | ELF 350 | NPR | 4BD1 / 4BE1 | 1985–2007 |
| ISUZU | NPR | NPR | 4BD1 / 4BE1 / 4BG1 | 1986–2007 |
| ISUZU | NKR | NKR | 4BD1 / 4BE1 | 1986–2007 |
| ISUZU | N-Series | — | 4BD1 / 4BE1 | 1985–2007 |
Non-ISUZU Applications (Same Engine Platform)
| Brand | Model | Application |
|---|---|---|
| Hitachi | EX100 / EX100-2 / EX100-3 | Excavator |
| Hitachi | EX120 / EX120-2 / EX120-3 | Excavator |
| Hitachi | EX150 / EX90 / EX90-2 | Excavator |
| JCB | — | Construction Equipment |
Important Fitment Notes:
- This oil cooler cover is designed for the 4BD1 / 4BE1 / 4BG1 / 4BC2 engine family. Confirm your specific engine model before ordering.
- The 8-94438355-0 and 8-94438371-0 are related oil cooler cover assemblies. Verify your exact OEM number against your original component.
- Oil cooler cover gaskets and O-rings are not included — order separately as needed (e.g., 8972333023, 5112820110).
- For right-hand drive (RHD) vehicles, verify clearance and routing. Refer to the ISUZU workshop manual for the correct procedure.
Fitment Verification: To ensure 100% accurate matching, please provide the VIN or chassis number before ordering. We will verify it through the ISUZU global EPC system.
Features & Benefits
| Feature | Benefit + Verification Signal |
|---|---|
| Precision-Cast Metal Construction | High structural strength and excellent heat resistance for reliable oil cooler protection — verified by material certificate and hardness testing. |
| OEM-Exact Mounting Flange | Precision-matched to the ISUZU 4BD1/4BE1 cylinder block — direct bolt-on installation without modification — verified by CMM dimensional inspection. |
| Optimized Coolant Flow Passages | Ensures efficient heat exchange between engine oil and coolant — verified by flow testing. |
| Corrosion-Resistant Surface Treatment | Extended service life in harsh engine environments — verified by salt spray testing. |
| Complete Assembly with Mounting Bosses | All required mounting points and sensor ports integrated — verified by assembly dimensional inspection. |
| ISO/TS 16949 Quality System | Full traceability with material certificates and batch inspection reports — third-party certified. |
| Installation Success Rate ≥ 99% | Based on repair order tracking — confirms reliable fitment across the 4BD1/4BE1 platform. |
Quality Control & Verification
| QC Item | Verification Method / Standard |
|---|---|
| Mounting Flange Dimensions | CMM, 100% inspection |
| Cover Height / Width / Depth | CMM, 100% inspection |
| Material Composition | Spectrometer analysis, batch sampling |
| Surface Hardness | Rockwell hardness tester, batch sampling |
| Pressure Tightness | Hydrostatic pressure test, 100% inspection |
| Coolant Flow Characteristics | Flow bench test, batch sampling |
| Surface Finish | Visual inspection — no cracks, no porosity, no burrs |
| Thread Inspection (Mounting Bolts) | Thread gauge, 100% inspection |
| Gasket Surface Flatness | Surface plate + feeler gauge, 100% inspection |
| Batch Traceability | Material lot number + production date |
| Packaging Protection | Anti-rust oil + VCI film + carton |
Installation & Maintenance Recommendations
IMPORTANT: Engine cooling system service must be performed by a qualified technician. Always drain the coolant and engine oil before removing the oil cooler cover. Never reuse old gaskets or O-rings.
Installation Guidelines — Reference ISUZU 4BD1 / 4BE1 Workshop Manual
- Preparation: Drain the engine coolant and engine oil into suitable containers. Disconnect the battery negative terminal. Remove the oil cooler lines and mounting bolts.
- Removal: Remove the oil cooler cover mounting bolts in a diagonal sequence. Carefully separate the cover from the oil cooler element and cylinder block. Remove the old gasket and O-rings.
- Inspection: Clean the cover and inspect for cracks, warping, or corrosion. Inspect the oil cooler element for damage or clogging. Check the cylinder block mating surface for flatness.
- Cleaning: Clean all mating surfaces thoroughly. Remove all old gasket material, oil residue, and coolant deposits. Blow dry with compressed air.
- Installation: Install new gaskets and O-rings. Place the oil cooler element and cover onto the cylinder block. Ensure proper alignment.
- Torque Sequence: Tighten the oil cooler cover-to-block bolts to 20 N·m (15 ft-lbs) in a diagonal sequence. Tighten the engine oil cooler fixing bolts to 19 N·m (1.9 kg·m / 14 lb·ft).
- Reconnection: Reconnect the oil cooler lines. Refill with fresh engine oil and coolant. Bleed the cooling system to remove air.
- Final Check: Run the engine and check for oil and coolant leaks at the cover joint. Verify proper oil pressure and coolant temperature.
Recommended Torque Values
| Fastener | Torque |
|---|---|
| Oil Cooler Cover-to-Block Bolts | 20 N·m (15 ft-lbs) |
| Engine Oil Cooler Fixing Bolts | 19 N·m (1.9 kg·m / 14 lb·ft) |
| Oil Cooler Line Fittings | Per ISUZU workshop manual specification |
Maintenance Schedule
- Every 10,000 km: Check for oil and coolant leaks at the oil cooler cover area. Check engine oil level and condition.
- Every 40,000–50,000 km: Inspect the oil cooler cover and gaskets for deterioration. Replace gaskets if any leakage is found.
- When coolant contamination is detected: Inspect the oil cooler cover and oil cooler element immediately. Replace if any damage is found.
- At engine overhaul: Always replace the oil cooler cover gaskets and O-rings with new units.
Packaging & Supply
- Standard Packaging: Anti-rust oil + VCI film + neutral carton (47.5 * 16 * 5 cm).
- Custom Packaging: Neutral box, color box, or customer-branded packaging.
- Suitable For: Engine repair shops, ISUZU parts distributors, fleet maintenance centers, construction equipment repair shops.
- Supply Capacity: Stable batch supply with batch-level quality reports available.
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