ISUZU 4BG1 Crankshaft 8-94339895-0 Forged Steel Dynamic Balance Tested ISO/TS16949 Certified Engine Core Component

Name: ISUZU 4BG1 Crankshaft 8-94339895-0 Forged Steel Dynamic Balance Tested ISO/TS16949 Certified Engine Core Component
Brand: Yimi (Guangzhou) Automotive Parts Co, Ltd
SKU: NPR 4BG1
Availability: InStock

Basic Properties

Place of Origin: CHINA

Brand Name: YIMI

Certification: ISO/TS16949

Model Number: NPR 4BG1

Trading Properties

Minimum Order Quantity: 20 PCS

Price: Negotiable

Payment Terms: T/T

Supply Ability: 10000 pcs/month

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Specifications

Connecting Rod Journal Diameter:	Refer To 4BG1 Engine Specifications (verify)	Overall Length:	Refer To 4BG1 Engine Specifications (verify)
Main Journal Diameter:	Refer To 4BG1 Engine Specifications (verify)	Material:	Forged Steel / Ductile Cast Iron
Compatible Engine:	ISUZU 4BG1	OEM Part Number:	8-94339895-0 / 8943398950
Installation Position:	Lower Engine Block / On Main Bearing Saddles	Part Type:	Engine Rotating Component
High Light:	Forged Steel Crankshaft , Dynamic Balance Tested Engine Core Component , ISO/TS16949 Certified ISUZU 4BG1 Crankshaft

Product Description

ISUZU Crankshaft 8-94339895-0 8943398950 for NPR 4BG1 — OEM Standard Engine Core Component

The ISUZU Crankshaft with OEM numbers 8-94339895-0 / 8943398950 is a precision-engineered replacement designed for ISUZU 4BG1 series diesel engines. This product is a core rotating component of the engine, responsible for converting the reciprocating motion of the pistons into rotational motion and transmitting power to the flywheel and drivetrain.

Numbering Note: This product number is 8-94339895-0 / 8943398950, also listed as 894339-8950.

Working Principle

The crankshaft is one of the most heavily loaded components in the engine, connected to the pistons via connecting rods. Its working principle includes:

Power Conversion: During the engine's power stroke, combustion pressure pushes the piston downward, converting reciprocating motion into rotational motion through the connecting rod.
Power Output: The crankshaft transmits rotational power through the flywheel to the clutch, transmission, and ultimately to the wheels.
Balance: Counterweights on the crankshaft offset the reciprocating inertia of the pistons and connecting rods, reducing engine vibration.
Accessory Drive: The front of the crankshaft drives the timing system, water pump, alternator, A/C compressor, and other accessories via belts/gears.

Failure Symptoms

⚠️ Inspect immediately if any of these occur:

Symptom	Probable Cause
Severe engine vibration, especially at specific RPM ranges	Bent crankshaft or damaged counterweights; loss of dynamic balance
Heavy "knocking" sound from engine (main bearing noise)	Worn main bearing journals; excessive main bearing clearance
Consistently low oil pressure	Worn crankshaft journals causing increased oil leakage
Crankshaft pulley wobbles noticeably	Bent crankshaft front end or damaged harmonic balancer
Engine fails to start or suddenly stalls	Broken crankshaft; severe internal engine damage

Product Specifications

ISUZU Crankshaft 8-94339895-0 for NPR 4BG1 Diesel Engine

Part Number:	8-94339895-0 8943398950
Product Name:	Crankshaft
Car Model:	NPR
Engine Model:	4BG1
Condition:	100% Brand New
Material:	High-strength aluminum alloy & precision bearings
Quality Standard:	OEM equivalent / ISO quality control
Warranty:	1 year

Vehicle & Engine Compatibility

Primary Vehicle Applications:

Brand	Model	Chassis	Engine
ISUZU	NPR	NPR	4BG1
ISUZU	NKR	NKR	4BG1
ISUZU	NQR	NQR	4BG1

Features & Benefits

High-Quality Forged Steel/Ductile Cast Iron Material

Excellent fatigue strength and wear resistance for long-term reliable operation under high-speed, high-load conditions.

Precision-Machined Dimensions

Ensures precise fit with main and connecting rod bearings — provides stable rotational support and proper lubrication clearance.

100% Dynamic Balance Tested

Ensures smooth high-speed engine operation; significantly reduces vibration and noise; extends engine service life.

ISO/TS16949 Quality Management Certified

Internationally recognized automotive industry quality standard ensuring full-process quality control.

Important Fitment Warnings

Number Confirmation: Verify the specific number on the engine nameplate before ordering.
Associated Components: When replacing the crankshaft, it is recommended to replace main bearings, connecting rod bearings, and front/rear crankshaft seals simultaneously.
Professional Installation: Crankshaft replacement is a core engine overhaul procedure requiring complete engine disassembly and reassembly. Must be performed by a qualified engine repair technician.