ISUZU Oil Cooler Gasket 8-98045447-0 8980454470 for NPR75 NQR90 FSR90 4HK1 6HK1 — OEM Standard OD=30.2mm Oil-Resistant Seal Gasket Verified Fit
Key Attributes
Product Summary
OEM-standard ISUZU oil cooler gasket 8-98045447-0 (OD 30.2mm) for NPR75/NQR90/FSR90 and Hitachi ZX200-3/ZX330-3 with 4HK1/6HK1 engines. High-quality sealing composite resists oil and coolant from -40°C to +120°C. Direct-fit, no sealant needed. 100% new, MOQ 1 pc, neutral or custom packaging, fast 2–3 day stock delivery.
Product Details
ISUZU Oil Cooler Gasket 8-98045447-0
,OEM Standard OD=30.2mm Oil-Resistant Seal
,NPR75 NQR90 FSR90 4HK1 6HK1 Fit
The Oil Cooler Gasket with OEM numbers 8-98045447-0 / 8980454470 is a verified direct-fit replacement for ISUZU NPR75, NQR90, NQR75 and FSR90 trucks, as well as Hitachi ZX200-3, ZX240-3 and ZX330-3 excavators equipped with 4HK1 and 6HK1 diesel engines. Installed at the mating surface between the oil cooler and the engine cylinder block, this gasket (GASKET; OIL COOLER TO C/BL B) seals both oil and coolant passages, preventing oil leakage and coolant cross-contamination while ensuring proper operation of the engine oil cooling system.
Manufactured from a high-quality sealing composite material to standard OEM thickness specifications, this gasket operates effectively across a temperature range of -40 °C to +120 °C, withstanding the severe thermal cycling and sustained pressure conditions found in the engine bay. With an outer diameter of 30.2 mm, it is precision-stamped with mounting holes that exactly match the oil cooler housing, allowing direct replacement without additional sealant or machining.
| Part Number | 8-98045447-0 / 8980454470 |
|---|---|
| Product Name | Oil Cooler Gasket (Gasket; Oil Cooler to C/Bl B) |
| Outer Diameter | OD = 30.2 mm |
| Thickness | Standard OEM specification |
| Material | High-quality sealing composite |
| Color | Black |
| Working Temperature | -40 °C to +120 °C |
| Net Weight | Approx. 0.5 g |
| Dimensions | Approx. 2.8 × 2.8 × 0.3 cm |
| Condition | 100% Brand New |
| Car Model | NPR75, NQR90, NQR75, FSR90 |
| Engine Model | 4HK1 / 6HK1 |
| Installation | Direct OEM replacement |
| Quality Standard | OEM equivalent / ISO quality control |
| Origin | China Mainland |
| Package | Neutral packing or made as requested |
| MOQ | 1 pc |
| Payment Terms | T/T, PayPal, etc. |
| Main Markets | Middle East, Asia, Africa, South America, North America & Europe |
Data source: supplier specification listings and OEM cross-reference records.
This gasket replaces the following ISUZU OEM numbers and series cross-references:
- 8-98045447-0
- 8980454470
- 8-98045-447-0
- 98045447
- 8943388781 / 8-94338878-1
- 8973841300
- 8-9804-5447-0
When the oil cooler gasket exhibits any of the following conditions, timely inspection and replacement are required:
- External oil seepage around the oil cooler: An aged, hardened or damaged gasket allows engine oil to seep from the cooler-to-block mating surface. Oil stains become visible on the engine bottom or sides.
- Coolant and oil mixing (emulsification): Seal failure allows the coolant and oil passages to interconnect. A milky, foamy substance appears on the oil filler cap or dipstick.
- Abnormal increase in oil consumption: Gasket leakage causes continuous oil loss, requiring frequent top-ups even without large visible puddles (oil may seep slowly externally or into the cooling system).
- Abnormal coolant level drop or fluid contamination: Coolant seeps through the failed gasket into the oil passages, lowering the coolant level and causing the oil to become cloudy.
- Oil sludge buildup around the oil cooler: Long-term minor seepage attracts dust and forms sludge, indicating degraded gasket sealing performance.
| Brand | Model / Equipment | Series | Engine | Note |
|---|---|---|---|---|
| ISUZU | NPR75 | N-Series | 4HK1 | Oil cooler gasket B |
| ISUZU | NQR90 | N-Series | 4HK1 | Oil cooler gasket B |
| ISUZU | NQR75 | N-Series | 4HK1 | Oil cooler gasket B |
| ISUZU | FSR90 | FORWARD 12.0 | 4HK1 | Oil cooler gasket B |
| HITACHI | ZX200-3 / ZX240-3 / ZX270-3 | ZX Series | 4HK1 | Excavator oil cooling system |
| HITACHI | ZX330-3 | ZX Series | 6HK1 | Excavator oil cooling system |
| HITACHI | SH200-5 / SH240-5 / CX210B / CX240B | SH / CX Series | 4HK1 / 6HK1 | Series reference |
Data source: vehicle and equipment compatibility per hitachi-isuzu.com (NPR75 4HK1; ZX200-3 / ZX240-3 / ZX270-3 4HK1; ZX330-3 6HK1; SH200-5 / CX210B etc.) and isuzu-ts-auto.ru (NPR75 / NQR90 / NQR75 / FSR90 4HK1) product pages.
Engine model confirmation: This gasket primarily fits 4HK1 and 6HK1 diesel engines. Variations may exist across model years or emission configurations. Verify the original engine nameplate before ordering.
Position confirmation (Gasket A / B distinction): This product is Gasket B (OD = 30.2 mm). The oil cooler assembly may use multiple gaskets of different sizes (e.g., Gasket A). Confirm the required position and dimensions before ordering.
Pre-installation verification: Please provide the VIN, engine number or original gasket number for precise fitment confirmation.
| Feature | Benefit & Verification Signal |
|---|---|
| High-Quality Sealing Composite Material | Composite material offers excellent resistance to oil, coolant and high temperatures, maintaining stable sealing at -40 °C to +120 °C — per hitachi-isuzu.com material and temperature specification. |
| Precision Stamped Forming (OD = 30.2 mm) | Outer diameter and mounting holes precisely match the oil cooler housing, ensuring uniform sealing pressure and preventing seepage — per okisuzu.com dimension listing. |
| Standard OEM Thickness | Thickness meets original specification, maintaining the correct clearance between cooler and block without additional adjustment — per hitachi-isuzu.com "Thickness: Standard OEM Specification". |
| Direct Replacement Design | Mounting dimensions precisely match the original; no additional sealant or surface modification required — per "Installation Type: Direct Replacement". |
| Broad Compatibility | Covers both ISUZU trucks (NPR75 / NQR90 / FSR90) and Hitachi construction machinery (ZX200-3 / ZX330-3), offering strong versatility — per supplier compatibility list. |
| Lightweight Compact Design | Net weight only approx. 0.5 g; compact size for easy inventory management and installation — per globalparts.ae data. |
| QC Item | Verification Method |
|---|---|
| OD and Thickness Dimension Inspection | Caliper / projector measurement — ensures OD = 30.2 mm and thickness meet OEM standards. |
| Material Composition & Hardness Test | Spectrometer / hardness tester — verifies the sealing composite meets oil and temperature resistance requirements. |
| Sealing Surface Flatness Inspection | Straight edge / feeler gauge — verifies no warping or deformation on the sealing surface. |
| Oil / Coolant Resistance Test | Immersion test — verifies material swelling rate and strength retention in oil and coolant. |
| Appearance & Packaging Inspection | 100% visual inspection — no cracks, burrs or chipped edges; packaging meets transport requirements. |
Certification: The supplier declares 100% new condition, with OEM or aftermarket quality options. For bulk procurement, request material certificates and dimensional inspection records from the supplier.
Oil cooler gasket replacement involves draining engine oil and coolant. Professional installation by a qualified technician is recommended. The mating surfaces of the oil cooler housing and engine block must be thoroughly cleaned before installation. All old gasket residue, oil and sealant must be removed; otherwise, the new gasket will fail to seal. Do not apply sealant to either side of the gasket (unless otherwise specified in the workshop manual). Tighten the cooler mounting bolts to the specified torque and sequence.
- Drain fluids: Drain engine oil and coolant, collecting waste fluids properly.
- Remove attachments: Remove lines and components around the oil cooler assembly to access the cooler mounting bolts.
- Remove old gasket: Remove the cooler mounting bolts and take out the old gasket. Use a plastic scraper or dedicated cleaner to completely remove old gasket residue and oil sludge from the mating surface. Never use a metal scraper on aluminum sealing surfaces.
- Install new gasket: Align the new gasket with the dowel pins / mounting holes on the block or cooler. Confirm correct orientation (if marked).
- Install cooler: Reinstall the cooler, tightening the mounting bolts to the specified torque and sequence in steps.
- Fill fluids: Fill with the specified amount of new engine oil and coolant. Start the engine and idle, checking the gasket mating surface for leaks.
- Road test: Perform a short road test, recheck for oil or coolant leaks, and confirm fluid levels are normal.
- Every 20,000 km or 12 months: Check around the oil cooler for signs of oil or coolant seepage.
- Every 50,000 km: In conjunction with oil changes, inspect the cooler sealing condition; replace the gasket promptly if minor seepage is found.
- When abnormal oil or coolant level drops or fluid emulsification is detected: Stop immediately and inspect to rule out gasket failure and cross-contamination.
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