ISUZU OEM Standard Push Rod for 4JH1 4JB1 4JA1 4JG1 Engines — Lightweight 0.06kg Valve Train Component
Basic Properties
Place of Origin:
CHINA
Brand Name:
YIMI
Certification:
ISO/TS16949
Trading Properties
Minimum Order Quantity:
20 PCS
Price:
Negotiable
Payment Terms:
T/T
Supply Ability:
10000 pcs/month
Specifications
| Net Weight: | 0.06 Kg | Material: | Metal |
| Installation Position: | Between Tappet And Rocker Arm | Compatible Engines: | ISUZU 4JH1, 4JB1, 4JA1, 4JC1, 4JG1, 4JG2 |
| Compatible Models: | ISUZU NKR77, NKR55, NKR66, NKR69, NKR71, NHR, NPR, NQR, NLR, NMR, QKR, TFR, TFS | Parts Figure-Key Number: | 014-088 |
| OEM Part Number: | 8-97071673-0 / 8970716730 | Associated Numbers: | 8-94143202-0 / 8941432020、8-97071673-1 / 8970716731 |
| High Light: | OEM Standard Push Rod,Compatible with ISUZU 4JH1 Valve Train Component,Lightweight 0.06kg ROD; PUSH |
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Product Description
ISUZU Push Rod 8-97071673-0 8970716730 for NKR77 4JH1 4JB1 — 0.06kg OEM Standard Valve Train Component
Product Overview
The ISUZU Push Rod with OEM numbers 8-97071673-0 / 8970716730 is a precision-engineered replacement designed for ISUZU NKR77 series light-duty trucks, compatible with 4JH1, 4JB1, 4JA1, and 4JG1 diesel engines. This component is a core part of the engine's valve train — the Push Rod (ROD; PUSH) — responsible for transferring camshaft lift motion to the rocker arms for precise valve actuation.
Numbering Note: This product number is 8-97071673-0 / 8970716730. Same-series numbers include 8-94143202-0 / 8941432020, 8-97071673-1 / 8970716731, and cross-reference numbers 02/800883, 02/800279. Please verify the specific number based on actual vehicle configuration.
Working Principle
The push rod is a critical force transmission component of the engine's valve train, installed between the tappet and the rocker arm. Its working principle includes:
- Force Transmission: As the camshaft rotates, the cam lobe pushes the tappet upward, transferring force to the lower end of the push rod.
- Lift Transfer: The push rod transmits the tappet's lift motion upward to the rocker arm, causing it to pivot.
- Valve Actuation: The rocker arm's pivot motion pushes the valve stem downward, overcoming spring pressure to open the intake or exhaust valve.
- Return: After the cam lobe passes its peak, the valve spring closes the valve, and the push rod returns to its original position.
Failure Symptoms
⚠️ Inspect immediately if any of these occur
| Symptom | Probable Cause |
|---|---|
| "Tapping" metallic noise from engine (valve train noise) | Bent or worn push rod; excessive valve clearance |
| Reduced engine power; poor acceleration | Deformed push rod reducing valve lift |
| Rough idle; engine vibration | Damaged push rod affecting individual cylinder valve operation |
| Visual inspection shows bent, worn, or broken push rod | Material fatigue from long-term high-load operation or poor lubrication |
| Hard starting | Severely damaged push rod preventing proper valve opening |
Technical Specifications
Net Weight: 0.06kg
HS Code: 840999100
Parts Figure-Key Number: 014-088
Quality Grade: High Quality
Material: Metal
Condition: Brand New
Warranty: 1 year
Packaging: Neutral Carton
Place of Origin: China
Delivery Time: 5–8 working days
Minimum Order Quantity: 5 pieces
Vehicle & Engine Compatibility
Primary Applications:
| Brand | Model Series | Compatible Engine | Notes |
|---|---|---|---|
| ISUZU | NKR77 | 4JH1, 4JB1 | Light-duty truck |
| ISUZU | NHR | 4JA1, 4JB1 | Light-duty truck |
| ISUZU | NPR | 4JB1 | Light/medium-duty truck |
| ISUZU | NQR | 4JG1, 4JG2 | Medium-duty truck |
| ISUZU | TFR / TFS | 4JA1, 4JB1 | Pickup truck |
Extended Compatibility Note: This product is widely compatible with ISUZU NKR77, NKR, NPR, NHR, NLR, NMR, QKR, TFR, TFS models and 4JH1, 4JB1, 4JA1, 4JC1, 4JG1, 4JG2 engines. Please verify the chassis code and engine model on the vehicle nameplate before ordering.
Important Fitment Warnings
- Number Confirmation: This product number is 8-97071673-0 / 8970716730. Associated numbers include 8-94143202-0 / 8941432020 and 8-97071673-1 / 8970716731. Verify the specific number on the original part before ordering.
- Installation Orientation: Push rods have a specific up/down orientation — ensure the upper end faces the rocker arm and the lower end faces the tappet.
- Valve Clearance Adjustment: After push rod replacement, valve clearance must be adjusted to ISUZU workshop manual specifications.
- Associated Components: When replacing push rods, it is recommended to inspect tappets, rocker arms, and valve clearance adjusting screws — replace if necessary.
- Lubrication: Apply engine oil to both ball ends of the push rod before installation.
- Set Replacement Recommended: If one push rod is damaged, inspect all push rods and replace as a set if necessary.
- Professional Installation: Push rods are critical valve train components requiring precision valve clearance adjustment — must be performed by a qualified engine repair technician.
Features & Benefits
OEM Standard Design
Manufactured to ISUZU original specifications — ensures perfect fitment for NKR77/4JH1/4JB1/4JA1/4JG1 engines; direct OEM replacement, no modification required.
Manufactured to ISUZU original specifications — ensures perfect fitment for NKR77/4JH1/4JB1/4JA1/4JG1 engines; direct OEM replacement, no modification required.
Lightweight Design (0.06kg)
Weight of only 0.06kg — reduces reciprocating mass and inertia loads; improves engine response performance.
Weight of only 0.06kg — reduces reciprocating mass and inertia loads; improves engine response performance.
100% Factory Quality Inspection
Every piece undergoes strict quality inspection — 100% tested before delivery.
Every piece undergoes strict quality inspection — 100% tested before delivery.
1-Year Warranty
Reliable after-sales protection — 1-year quality guarantee.
Reliable after-sales protection — 1-year quality guarantee.
Broad Vehicle Compatibility
Fits NKR77, NKR, NPR, NHR, NLR, NMR, QKR, TFR, TFS models and 4JH1, 4JB1, 4JA1, 4JC1, 4JG1, 4JG2 engines.
Fits NKR77, NKR, NPR, NHR, NLR, NMR, QKR, TFR, TFS models and 4JH1, 4JB1, 4JA1, 4JC1, 4JG1, 4JG2 engines.
Flexible Supply
MOQ 5 pieces, delivery 5–8 working days — meets diverse procurement needs.
MOQ 5 pieces, delivery 5–8 working days — meets diverse procurement needs.
Quality Control & Verification
| QC Item | Inspection Method | Acceptance Criterion | Frequency |
|---|---|---|---|
| Push rod length | Height gauge / CMM | OEM standard size ± tolerance | 100% |
| Push rod diameter | Micrometer | OEM standard size ± tolerance | 100% |
| Ball end surface hardness | Rockwell hardness tester (HRC) | Standard hardness range | Batch sampling |
| Push rod straightness | V-block + Dial indicator | ≤ standard value | Batch sampling |
| Material composition | Spectrometer | Per metal standard | Batch sampling |
| Visual inspection | Visual | No scratches, burrs, or rust | 100% |
| 100% function test | Special inspection equipment | 100% tested | 100% |
Installation & Maintenance
IMPORTANT SAFETY NOTICE:
Push rods are critical valve train components — improper installation may cause valve failure and severe engine damage. Replacement requires precision valve clearance adjustment — must be performed by a qualified engine repair technician.
Push rods are critical valve train components — improper installation may cause valve failure and severe engine damage. Replacement requires precision valve clearance adjustment — must be performed by a qualified engine repair technician.
Installation Guidelines
Preparation:
- Confirm engine model (4JH1 / 4JB1 / 4JA1 / 4JG1) and part number (8-97071673-0)
- Prepare tools: Socket wrench, feeler gauge, torque wrench, engine oil
- Recommended to also prepare: Valve cover gasket, tappets (if needed)
Removing Old Push Rod:
- Park vehicle on level surface, engage parking brake, and allow the engine to cool.
- Remove the valve cover.
- Remove the rocker arm assembly, note the position of each push rod.
- Remove the old push rods and inspect for bending, wear, or cracks.
- Inspect tappets and rocker arms for wear.
Installing New Push Rod:
- Inspect new push rod: Check for scratches, burrs, or defects.
- Lubricate: Apply engine oil to both ball ends of the new push rod.
- Install push rod: Install the new push rod in its original position between the tappet and rocker arm — note the orientation.
- Install rocker arm assembly: Install the rocker arm assembly and torque bolts to specification.
- Adjust valve clearance: Valve clearance must be adjusted to ISUZU workshop manual specifications.
- Install valve cover: Install the valve cover with a new gasket.
Maintenance Schedule
| Item | Interval | Notes |
|---|---|---|
| Valve clearance check/adjustment | Every 20,000～30,000 km | Check immediately if noise detected |
| Push rod inspection | During engine overhaul | Check for bending or wear |
| Push rod replacement | Upon bending/wear | Replace as a set if necessary |
Packaging & Supply
| Packaging | Neutral Carton |
| Quantity per package | 5 pieces/pack |
| Product Net Weight | 0.06 kg |
| Brand | OEM Standard |
| Place of Origin | China |
| Customization Options | OEM custom packaging / neutral packaging / private labeling |
| Minimum Order Quantity | 5 pieces |
| Delivery Time | 5–8 working days |
| Warranty | 1 year |
| HS Code | 840999100 |
| Target Customers | Truck parts wholesalers, light-duty truck repair shops, engine overhaul shops, fleet purchasers, export traders |
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