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Isuzu 8980184621 Injector Sleeve For 4HK1 6HK1 Engines 8976066610 For 700P ELF FRR FVR FVM NPR NQR
Direct replacement injector sleeve (injector nozzle holder sleeve / injector tube sleeve) for Isuzu 4HK1 and 6HK1 diesel engines OE cross reference: 8976066610, 8980184621, 8-97606661-0, 8-98018462-1 Compatible with Isuzu 700P, ELF, FRR, FVR, FVM, NPR, and NQR trucks Precision-engineered brass construction – Seals injector nozzle in cylinder head Choose from 2 quality levels – Famous Brand Aftermarket Quality / Japanese ISUZU Quality Critical for engine performance – Prevents combustion gas and coolant leakage MOQ: 1 piece (set of 4 or 6 recommended)
Description
Products Overview
The Injector Sleeve (also known as injector nozzle holder sleeve, injector tube sleeve, or injector seal sleeve) is a precision-engineered brass component that serves as a critical sealing element in the cylinder head of Isuzu 4HK1 and 6HK1 common rail diesel engines. This sleeve creates a sealed passage between the injector nozzle and the combustion chamber, preventing high-pressure combustion gases from escaping and stopping coolant from entering the injector bore area .
This injector sleeve is specifically designed for Isuzu 4HK1 (4-cylinder) and 6HK1 (6-cylinder) diesel engines – powerful and reliable powerplants found in Isuzu 700P, ELF, FRR, FVR, FVM, NPR, and NQR medium and heavy-duty trucks.Choose from 2 quality levels – Famous Brand Aftermarket Quality / Japanese ISUZU Quality.These engines are widely used for cargo transport, logistics, construction, and municipal applications worldwide.The injector sleeve serves multiple critical functions: it positions the injector nozzle precisely within the cylinder head, seals the combustion chamber to prevent gas blow-by, isolates the injector from engine coolant, and protects the injector tip from carbon buildup and corrosion . Manufactured from corrosion-resistant brass, these sleeves are designed to withstand extreme cylinder pressures (up to 200 bar) and temperatures ranging from -40°C to 150°C
Products Specifications
| Parameter | Specification |
|---|---|
| Product Name | Injector Sleeve / Injector Nozzle Holder Sleeve / Injector Tube Sleeve / Injector Seal Sleeve |
| OE Numbers | 8976066610, 8980184621, 8-97606661-0, 8-98018462-1 |
| Quality Options | Famous Brand Aftermarket Quality / Japanese ISUZU Quality |
| Material | Precision-machined brass – Corrosion-resistant and high-strength |
| Design | Cylindrical with flared end and threaded interface |
| Pressure Rating | 200 bar (2,900 PSI) – Withstands common rail injection pressures |
| Temperature Range | -40°C to 150°C (-40°F to 302°F) |
| Function | Seals injector nozzle in cylinder head – Prevents gas and coolant leakage |
| Compatible Engines | Isuzu 4HK1 (4-cylinder), Isuzu 6HK1 (6-cylinder) |
| Compatible Models | Isuzu 700P, ELF, FRR, FVR, FVM, NPR, NQR (see fitment table) |
| Quantity per Engine | 4 sleeves (4HK1) / 6 sleeves (6HK1) |
| H/S Code | 8409999000 |
| Place of Origin | China |
| MOQ | 1 piece (full engine set recommended) |
| Warranty | 1 Year |
Related Products
More Related Parts You May Need
| Part | OEM Number (Typical) | Purpose |
|---|---|---|
| Injector Sealing Washer / Copper Gasket | Various | Seals injector nozzle to sleeve |
| Injector Clamp Bolt | 8980184622 (example) | Secures injector to cylinder head |
| Injector Sleeve Sealant | 8980184623 (example) | Specialized high-temperature sealant |
| Injector Puller Tool | Various | Removes injectors from sleeves |
| Cylinder Head Gasket Set | Various | Complete top-end overhaul |
Signs Your Rubber Upper Cushion Needs Replacement
| Symptom | What You May Notice | What It Means |
|---|---|---|
| Hard starting | Engine cranks excessively before starting | Loss of compression – Injector sleeve seal failure |
| Rough idle | Engine shakes or runs unevenly at idle | Combustion gases leaking past injector sleeve |
| Engine misfire under load | Hesitation or stumbling when accelerating | Injector not properly sealed – Compression loss |
| Black smoke from exhaust | Excessive black smoke during acceleration | Poor combustion due to sealing issues |
| Coolant loss without external leak | Radiator level drops – No visible drips | Combustion gases pressurizing cooling system through failed sleeve seal |
| Bubbles in coolant reservoir | Air or gas bubbles visible in coolant tank | Combustion gases entering cooling system – Critical warning |
| White sweet-smelling exhaust smoke | Coolant burning in combustion chambers | Sleeve seal failure allowing coolant into cylinder |
| Engine overheating | Temperature gauge high – No other cause | Combustion gas intrusion into cooling system |
| Fuel in coolant (rare) | Diesel smell or sheen in coolant | Severe seal failure – Immediate attention required |
Installation Notes
| Step | Procedure |
|---|---|
| 1 | Remove the injector from the affected cylinder |
| 2 | Clean the injector bore area thoroughly |
| 3 | Use a specialized injector sleeve puller to remove the old sleeve (do not damage cylinder head bore) |
| 4 | Clean the sleeve bore in the cylinder head – Remove all carbon, rust, and old sealant |
| 5 | Inspect the bore for damage or corrosion – The head may require machining if damaged |
| 6 | Apply appropriate sealant to the new sleeve (per Isuzu specification) |
| 7 | Use an injector sleeve installation tool to press the new sleeve into place |
| 8 | Ensure the sleeve is seated to the correct depth |
| 9 | Allow sealant to cure per manufacturer's instructions |
| 10 | Reinstall the injector with a new copper washer or seal |
| 11 | Torque injector clamp bolts to 30 N·m (22 ft-lbs) per cylinder |
| 12 | Bleed the fuel system to remove trapped air |
| 13 | Start the engine and check for leaks – Verify no bubbles in coolant |
Important Recommendations:
| Tip | Benefit |
|---|---|
| Replace all injector sleeves at the same time | Ensures consistent sealing performance across all cylinders |
| Always use new injector sealing washers | Old washers will not seal properly |
| Use only recommended sealant | Incorrect sealant will fail under high pressure/temperature |
| Pressure test cooling system after installation | Confirms proper sealing before returning vehicle to service |
| Flush cooling system if combustion gases have entered | Contaminated coolant can cause further damage |
Why Choose Us?
1. 29 years one-stop supply for all Isuzu models & full truck parts
Professional Isuzu parts supplier, one-stop sourcing saves your time and cost.
2. Two quality grades for your choice
Famous brand aftermarket and genuine Japanese Isuzu quality available, fit for 4HK1 / 6HK1 engines, selectable by budget and reliability needs.
3.Premium material & precise workmanship
Corrosion-resistant brass made, precision machined with strict dimensional accuracy; withstands 200 bar pressure and -40°C~150°C extreme temperature for stable engine performance.
4. Perfect fit & durable performance
Flared-end design ensures accurate injector alignment, effectively protects engine and avoids fuel leakage.
5. Low MOQ & flexible purchase
1 piece acceptable for single replacement; full set options for engine rebuild.
6. Fast global delivery & warranty support
Ships worldwide in 1–8 working days, backed by 1-year manufacturer warranty.
7. Wholesale & fleet discount
Competitive bulk pricing for repair shops, fleets and parts distributors, professional technical support provided.
FAQs
Q1: How many injector sleeves do I need for my engine?
A: This depends on your engine:
Isuzu 4HK1 (4-cylinder engine) – 4 injector sleeves (one per cylinder)
Isuzu 6HK1 (6-cylinder engine) – 6 injector sleeves (one per cylinder)
We recommend replacing all injector sleeves at the same time for consistent engine performance.
Q2: Will this fit my Isuzu 700P with the 4HK1 engine?
A: Yes. The injector sleeve with OEM numbers 8976066610 and 8980184621 is specifically designed for Isuzu 4HK1 and 6HK1 engines, which power the 700P, ELF, FRR, FVR, NPR, NQR, and other Isuzu medium and heavy-duty trucks.
Q3: What are the symptoms of a bad injector sleeve?
A: Common symptoms include hard starting, rough idle, misfiring under load, black smoke, coolant loss without external leaks, bubbles in the coolant reservoir, engine overheating, and in severe cases, white sweet-smelling exhaust smoke.
Q4: Can I replace just one injector sleeve?
A: While technically possible, we strongly recommend replacing all injector sleeves at the same time. If one sleeve has failed, the others are likely near the end of their service life. Replacing all ensures balanced engine performance and saves labor costs in the long run.
Q5: What is the difference between OEM numbers 8976066610 and 8980184621?
A: These are different part numbers for similar injector sleeves used across different Isuzu applications:
8980184621 / 8-98018462-1 – Commonly referenced for 4HK1/6HK1 engines
8976066610 / 8-97606661-0 – Alternative or superseded part number
Both are injector sleeves for 4HK1 and 6HK1 engines. Please verify your specific engine requirements.
Q6: Do I need special tools to install injector sleeves?
A: Yes. Proper installation requires:
Injector sleeve puller (for removal)
Injector sleeve installation tool (for pressing new sleeve)
Proper sealant
We strongly recommend professional installation by a qualified diesel mechanic.
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Baishiyi Jiulongpo District, High-tech Zone,Chongqing,China.
Phone Number/Whatsapp/wechat
+8617383152089
ZCMisuzu@guanglian99.com
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