Piston Cooling Oil Jet Nozzle 8-98020649-0 8980206490 8-98173342-0 8981733420 For ISUZU FSR/FRR/FVR/NPR/NQR 6HK1 4HK1 6HE1 Diesel Engine — OEM Complete Set Of 4
The Piston Cooling Oil Jet with OEM numbers 8-98020649-0 (also listed as 8980206490) and 8-98173342-0 (also listed as 8981733420) is a verified OEM-grade direct replacement for ISUZU 6HK1, 4HK1, and 6HE1 series diesel engines. This precision-engineered component is mounted in the engine block and directs a precise, pressurized jet of engine oil onto the underside of each piston, providing essential cooling and lubrication during high-load operation.
| Part Number | 8-98020649-0 8980206490 8-98173342-0 8981733420 |
| Product Name | Piston Cooling Oil Jet Nozzle |
| Car Model | ISUZU FSR/FRR/FVR/NPR/NQR 6HK1 4HK1 6HE1 |
| Engine Model | ISUZU 6HK1 4HK1 6HE1 |
| Condition | 100% Brand New |
| Material | High-strength aluminum alloy & precision bearings |
| Quality Standard | OEM equivalent / ISO quality control |
- OEM Specification – Verified by ISUZU OEM part numbers
- Proven Durability – Cast metal body with brass cooling jet tube
- Installation Success Rate – 99% direct bolt-on fitment
- Complete Set of 4 – Comprehensive engine coverage
- OEM Cross-Reference Verified – Replaces multiple OEM numbers
If your piston cooling oil jet is failing or clogged, you may experience:
- Engine Overheating – Elevated operating temperatures under load
- Excessive Oil Consumption – Noticeable drop in oil level
- Piston Scuffing or Seizure – Potential catastrophic engine damage
- Loss of Engine Power – Reduced power output and efficiency
- Increased Exhaust Smoke – Black or blue smoke from exhaust
- Metallic Particles in Oil – Visible particles during servicing
Warning: A clogged or damaged piston cooling oil jet can lead to localized piston overheating, ring land cracking, and eventual catastrophic engine failure.
| Brand | Model | Chassis / Series | Engine | Years |
|---|---|---|---|---|
| ISUZU | FSR | F-Series | 6HE1, 6HK1 | 1995-2010 |
| ISUZU | FRR | F-Series | 6HE1, 6HH1, 4HK1 | 1995-2010 |
| ISUZU | FVR | F-Series | 6HK1 | 2000-2010 |
| ISUZU | NPR | N-Series | 4HK1 | 2004-2010 |
| ISUZU | NQR | N-Series | 4HK1 | 2004-2010 |
| Hitachi | Crawler Excavators | ZX200-3, ZX350K, ZW250 | 4HK1, 6HK1 | - |
Important: Quantity Required: 4 per engine for 4-cylinder 4HK1; 6 per engine for 6-cylinder 6HK1/6HE1. Please verify your vehicle's chassis code, production year, and engine code before ordering.
Guarantees factory-fit quality and performance with verified ISUZU OEM part numbers
Delivers fine, pressurized oil jet directly onto piston crown for optimal cooling
Cast metal body with brass jet tube withstands extreme temperatures and pressures
Reduces thermal stress on pistons, preventing ring land cracking and cylinder wall scuffing
| QC Item | Verification Method |
|---|---|
| Dimensional Accuracy | Precision inspection to match OE blueprint specifications |
| Material Composition | Cast metal body analysis and brass jet tube verification |
| Spray Pattern Test | 100% flow testing to verify oil spray pattern meets OEM specs |
| Leakage Test | 100% pressure testing to guarantee zero internal leakage |
| Durability Cycle Test | 500+ hour thermal and pressure cycling for reliability |
| Final Assembly Inspection | 100% visual and dimensional inspection before packaging |
IMPORTANT: Professional Installation Highly Recommended. Piston cooling oil jet replacement requires engine disassembly and expert knowledge.
Installation Guidelines:
- Drain engine oil completely and remove oil pan
- Remove retaining bolts securing old oil jets
- Clean mounting bore thoroughly before installation
- Ensure brass jet tube points toward underside of piston
- Torque to manufacturer's specified settings
- Verify proper alignment and no interference with moving parts
Maintenance: Inspect during major engine overhauls or if cooling issues are suspected. Always use clean, high-quality engine oil and replace oil filter regularly.
- Packaging: Protective carton to prevent shipping damage
- Set Contents: 4 PCS per set (sufficient for one 4-cylinder engine)
- For 6-Cylinder Engines: 2 sets (8 PCS) required
- Net Weight: Approx. 0.03 kg/pc
- MOQ: 1 set (4 PCS)
Suitable for wholesale distributors, engine rebuild shops, truck repair facilities, construction equipment service centers, and fleet owners.
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