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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.
Lightweight Design (0.06kg)
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.
Flexible Supply
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.
Installation Guidelines
Preparation:
Confirm engine model (4JH1 / 4JB1 / 4JA1 / 4JG1) and part number (8-97071673-0)
Yimi (Guangzhou) Automotive Parts Co., Ltd.
Located in Guangzhou—the economic and transportation hub of Southern China—we are a specialized supplier and exporter with over 20 years of experience in the automotive parts industry. We focus on the production and sales of high-quality ... Yimi (Guangzhou) Automotive Parts Co., Ltd.
Located in Guangzhou—the economic and transportation hub of Southern China—we are a specialized supplier and exporter with over 20 years of experience in the automotive parts industry. We focus on the production and sales of high-quality ...
