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8971317293 4KH1 4JH1 Intake Valve 8971317290 8970802141 For ISUZU NKR77 NHS NPR NQR TFR UCS 8-97131729-3
8971317293 8971317290 8970802141 8-97131729-0 8-97080214-1 4KH1 4JH1 Intake Valve for ISUZU NHS/NKR/NPR/NQR/TFR/UCS 8-97131729-3 , 3 Quality Grades Available China ISUZU (Qingling) Quality / Famous Brand Aftermarket Quality /China ISUZU (Qingling) Quality for Choose .
Description
The Intake Valve is a critical internal engine component that controls the flow of air (or air-fuel mixture) into the combustion chamber of the ISUZU 4KH14JH1 diesel engine. The intake valve opens at precisely the right moment to allow fresh air to enter the cylinder, then closes to seal the combustion chamber during compression and power strokes .
The intake valve operates under extreme conditions, withstanding combustion temperatures up to 800°C (1472°F) and high cylinder pressures. Premium intake valves are manufactured from heat-resistant alloy steel with a hardened tip and precision-ground valve face to ensure proper sealing against the valve seat .
This intake valve is specifically designed for ISUZU NKR77 light-duty trucks powered by the 4KH1, 4JH1(3.0L turbo diesel) engine – a highly reliable and fuel-efficient powerplant widely used for cargo transport, delivery services, and commercial fleets .
Products Specifications
| Parameter | Specification |
|---|---|
| Product Name | Intake Valve / Engine Intake Poppet Valve / Air Intake Valve |
| OE Numbers | 8971317293, 8-97131729-3 8971317290 8970802141 8-97131729-0 8-97080214-1 |
| Quality | Qingling (China ISUZU) Quality – Factory-grade |
| Valve Type | Intake (poppet valve) |
| Material | Heat-resistant alloy steel (silicon-chromium or equivalent) |
| Valve Face Treatment | Induction-hardened – Wear-resistant |
| Valve Tip Treatment | Hardened – Wear-resistant |
| Stem Treatment | Chrome-plated or induction-hardened |
| Head Diameter | OEM specification (verify with original) |
| Stem Diameter | OEM specification (verify with original) |
| Overall Length | OEM specification (verify with original) |
| Valve Angle | OEM specification (typically 45 degrees) |
| Compatible Engine | ISUZU 4KH1 4JH1 (3.0L Turbo Diesel) |
| Compatible Models | ISUZU NKR77 ISUZU NHS/NPR/NQR/TFR/UCS (see fitment table) |
| Quantity per Engine | 8 intake valves (4-cylinder – 2 per cylinder) |
| H/S Code | 8409999000 |
| Place of Origin | China |
| MOQ | 1 piece (set of 8 recommended) |
| Warranty | 1 Year |
Intake Valve VS Exhaust Valve
| Comparison Item | Intake Valve (This Product) | Exhaust Valve (Matching Part) |
|---|---|---|
| OEM Number | 8-97131729-3 / 8971317293 | Different exclusive OEM part number (contact us for inquiry) |
| Core Function | Open to suck fresh air into engine cylinder; ensure sufficient oxygen for diesel combustion | Open to discharge high-temperature burned exhaust gas out of cylinder |
| Working Temperature | Medium working temperature (300℃-450℃)Cooled by incoming fresh air during operation | Ultra-high working temperature (650℃-850℃)Direct contact with scorching exhaust gas, no air cooling |
| Material Difference | Standard heat-resistant forged steel, meet conventional engine intake working demand | Special high-temperature nickel-based alloy, stronger heat and corrosion resistance |
| Structural Difference | Larger valve head diameter for faster air intake efficiency | Smaller valve head, thicker valve rod for anti-deformation under extreme heat |
| Common Fault Manifestations | Insufficient engine power, slow acceleration, unstable idle speed, insufficient air intake | Excessive black smoke, engine overheating, valve ablation, loud engine knocking noise |
| Replacement Suggestion | Replace separately when intake system fails; our dual quality options fully match original size | Suggest matched replacement with intake valve during full engine overhaul |
View More to explore ISUZU Engine System
- Professional manufacturer focusing on ISUZU truck engine spare parts for more than 29 years.
- Complete stock for 4KH1 series engine parts, one-stop purchasing support.
- Dual quality grade solution to cover all market segments.
- Strict QC system, professional after-sales team to solve product problems quickly.
- Support OEM & ODM service, private label packing for global wholesalers.
01
High Quality
The intake valve works in high-temperature combustion chamber environment for a long time. We adopt high-grade heat-resistant forged steel material, effectively avoiding valve deformation
02
Advanced Equipment
Strictly follow OEM dimension standard of 8-97131729-3. No grinding, cutting or other modifications required during installation, greatly saving installation time and labor cost for mechanics.
03
Professional Team
Every single intake valve passes strict dimensional detection, air tightness test and surface defect inspection before leaving factory, zero defective parts delivered to customers.
04
Custom Service
24 hours online-customer service. You can chat with us if you need help .
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