OEM Fit Oil Cooler Housing for ISUZU 4HF1 4HG1 Engines - ISO/TS 16949 Certified Oil Cooler Cover Assembly
Basic Properties
Place of Origin:
CHINA
Brand Name:
YIMI
Certification:
ISO/TS16949
Model Number:
4HF1 4HG1
Trading Properties
Minimum Order Quantity:
20 PCS
Price:
Negotiable
Payment Terms:
T/T
Supply Ability:
10000 pcs/month
Specifications
| Position: | Engine Side — Oil Cooler Mounting | Material: | Metal |
| Net Weight: | 1.8 Kg | Engine Compatibility: | 4HF1 / 4HG1 / 4HG1-T |
| OEM Part Number: | 8-97333783-0 / 8973337830 | Cooling Type: | Engine Coolant Circulation |
| Installation: | Direct OEM Replacement | Vehicle Models: | ISUZU NPR / NQR / NKR / NPR71 / NQR71 / CXZ / Bogdan A-091 / A-092 |
| High Light: | OEM Fit Oil Cooler Housing,4HF1 4HG1 Engine Compatibility Oil Cooler Cover Assembly,ISO/TS 16949 Certified Engine Oil Cooler Cover |
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Product Description
ISUZU NPR 4HF1 4HG1 Oil Cooler Housing 8-97333783-0 8973337830 OEM Fit
Oil Cooler Housing 8-97333783-0 8973337830 for ISUZU NPR NQR NKR 4HF1 4HG1 4HG1-T CXZ — Verified OEM Fit Engine Oil Cooler Cover Assembly
Product Description
The Oil Cooler Housing with OEM numbers 8-97333783-0 and 8973337830 is a verified direct-fit replacement for ISUZU NPR / NQR / NKR / NPR71 / NQR71 / CXZ light and medium-duty trucks and Bogdan A-091 / A-092 buses equipped with 4HF1 / 4HG1 / 4HG1-T diesel engines. This oil cooler housing is a critical engine lubrication system component responsible for housing the oil cooler element, channeling coolant flow around the oil cooler core, and maintaining proper engine oil temperature under all operating conditions.
Working Principle
The oil cooler housing (also called oil cooler cover) 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 housing also provides sealed passages for oil inlet and outlet connections, maintaining proper oil pressure and flow through the cooling circuit. The 4HF1 is a 4.3L inline-four direct-injection diesel engine and the 4HG1 is a 4.57L variant, both widely used in ISUZU NPR/NQR trucks from 1994 to 2016. The oil cooler housing is manufactured from high-grade metal with precision-machined surfaces to ensure a leak-free seal with the oil cooler element and cylinder block.
Failure Symptoms
Replace the oil cooler housing when any of these symptoms appear:
- Engine oil leakage around the oil cooler area — visible oil traces on the housing surface, mounting flange, or surrounding engine components.
- Coolant seepage at the housing joint — coolant mixing with engine oil or external coolant leaks at the housing-to-block mating surface.
- Engine overheating — a cracked or deformed housing prevents proper coolant flow around the oil cooler, reducing heat exchange efficiency.
- Oil contamination with coolant — internal housing failure allows coolant to enter the oil circuit, creating a milky emulsion in the engine oil.
- Visible cracks, deformation, or corrosion on the housing — 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 housing is removed, all gaskets and O-rings must be replaced with new units. The housing mounting surface must be perfectly clean and flat before installation. Always torque the housing 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) | 8-97333783-0 | ISUZU OEM Parts Database |
| Part Number (Long) | 8973337830 | ISUZU OEM Parts Database |
| Alternate Format | 8-97333-783-0 / 8-97333783-J | ISUZU OEM Parts Database |
| Part Name | Oil Cooler Housing / Oil Cooler Cover Assembly | ISUZU EPC |
| Vehicle Models | ISUZU NPR / NQR / NKR / NPR71 / NQR71 / CXZ / Bogdan A-091 / A-092 | ISUZU application catalog |
| Engine Compatibility | 4HF1 / 4HG1 / 4HG1-T | ISUZU application catalog |
| Material | Metal | Product specification |
| Net Weight (per unit) | 1.8 kg | Product specification |
| Packaging | Neutral Carton / Color Box / Customer Brand | Product specification |
| Minimum Order Quantity | 10 PCS | Product specification |
| Certification | ISO/TS 16949 | Third-party system audit |
OEM Cross-Reference
| Type | Number |
|---|---|
| Primary OEM — Short | 8-97333783-0 |
| Primary OEM — Long | 8973337830 |
| Alternate Format | 8-97333-783-0 |
| Related Variant | 8-97333783-J / 897333783J |
| Related OEM | 8-97385200-1 / 8973852001 |
| Related OEM | 8972123340 |
| Related OEM | 8973852000 |
| Related OEM | IZ02-M137A |
| Competitive Cross-Reference | IZUMI 8-97333783-0, BZLP, JMC 8973337830 |
| Part Number: | 8-97333783-0 8973337830 | Product Name: | Oil Cooler Housing |
| Car Model: | NPR | Engine Model: | 4HF1 4HG1 |
| Condition: | 100% Brand New | Size: | Standard |
| Weight: | Standard | Origin: | China Mainland |
| Main Market: | Middle East, Asia, Africa, South America, North America & Europe | Package: | Neutral Packing Or Make It As Requested |
| Material: | High-strength aluminum alloy & precision bearings | Cooling Type: | Engine coolant circulation |
| Installation: | Direct OEM replacement | Quality Standard: | OEM equivalent / ISO quality control |
Vehicle & Engine Compatibility
| Brand | Model | Chassis | Engine | Years |
|---|---|---|---|---|
| ISUZU | NPR | NPR66 / NPR70 / NPR71 / NPR75 | 4HF1 / 4HG1 / 4HG1-T | 1994–2016 |
| ISUZU | NQR | NQR70 / NQR71 / NQR75 | 4HF1 / 4HG1 / 4HG1-T | 1996–2016 |
| ISUZU | NKR | NKR66 / NKR71 / NKR77 | 4HF1 / 4HG1 | 1994–2007 |
| ISUZU | NPR71 | NPR71L | 4HG1-T | 1995–2016 |
| ISUZU | CXZ | CXZ | 4HF1 | 1990s–2000s |
| ISUZU | ELF | N-Series | 4HF1 / 4HG1 | 1994–2016 |
Non-ISUZU Applications (Same Platform)
| Brand | Model | Application |
|---|---|---|
| Bogdan | A-091 / A-092 | Bus |
| Chevrolet | W3500 / W4500 | Light Truck |
| GMC | W3500 / W4500 | Light Truck |
Important Fitment Notes:
- This oil cooler housing is designed for the 4HF1 / 4HG1 / 4HG1-T engine family. Confirm your specific engine model before ordering.
- The 8-97333783-J / 897333783J is the J-suffix variant for the same application — verify your exact OEM number against your original component.
- The 8972123340 and 8973852000 are related OEM numbers for the same oil cooler assembly.
- Oil cooler housing gaskets and O-rings are not included — order separately as needed.
- 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
Precision-Cast Metal Construction
High structural strength and excellent heat resistance for reliable oil cooler protection — verified by material specification and hardness testing.
High structural strength and excellent heat resistance for reliable oil cooler protection — verified by material specification and hardness testing.
OEM-Exact Mounting Flange
Precision-matched to the ISUZU 4HF1/4HG1 cylinder block — direct bolt-on installation without modification — verified by CMM dimensional inspection.
Precision-matched to the ISUZU 4HF1/4HG1 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.
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.
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.
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.
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 NPR/NQR/NKR platform.
Based on repair order tracking — confirms reliable fitment across the NPR/NQR/NKR platform.
Quality Control & Verification
| QC Item | Verification Method / Standard |
|---|---|
| Mounting Flange Dimensions | CMM, 100% inspection |
| Housing 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 housing. Never reuse old gaskets or O-rings.
Installation Guidelines — Reference ISUZU 4HF1 / 4HG1 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 housing mounting bolts in a diagonal sequence. Carefully separate the housing from the oil cooler element and cylinder block. Remove the old gasket and O-rings.
- Inspection: Clean the housing 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 housing onto the cylinder block. Ensure proper alignment.
- Torque Sequence: Tighten the oil cooler housing-to-block bolts in a diagonal sequence to the specified torque. Tighten the engine oil cooler fixing bolts to specification.
- 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 housing joint. Verify proper oil pressure and coolant temperature.
Recommended Torque Values
| Fastener | Torque |
|---|---|
| Oil Cooler Housing-to-Block Bolts | Per ISUZU workshop manual specification |
| Oil Cooler Fixing Bolts | Per ISUZU workshop manual specification |
| 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 housing area. Check engine oil level and condition.
- Every 40,000–50,000 km: Inspect the oil cooler housing and gaskets for deterioration. Replace gaskets if any leakage is found.
- When coolant contamination is detected: Inspect the oil cooler housing and oil cooler element immediately. Replace if any damage is found.
- At engine overhaul: Always replace the oil cooler housing gaskets and O-rings with new units.
Packaging & Supply
- Standard Packaging: Anti-rust oil + VCI film + neutral carton.
- Custom Packaging: Neutral box, color box, or customer-branded packaging.
- Suitable For: Engine repair shops, ISUZU parts distributors, fleet maintenance centers, bus fleet operators.
- Supply Capacity: Stable batch supply with batch-level quality reports available.
- Minimum Order Quantity: 10 PCS
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