4BG1 Con Rod Bush – Isuzu Engine Parts, OEM Size Connecting Rod Bushing for Construction &

Product Details

Product Overview

This high-precision 4BG1 Con Rod Bush is specifically manufactured for Isuzu 4BG1 diesel engines, a power unit widely used in construction machinery, agricultural equipment, industrial generators, and marine applications. As a critical component within the engine’s valvetrain and bottom end assembly, this connecting rod bushing ensures the smooth articulation of the piston assembly and connecting rod, reducing friction and wear over extended operational periods.

Designed to OEM size specifications, this bushing provides a direct replacement fit for standard Isuzu 4BG1 engine rebuilds or overhauls. The part is sourced from, a reputable aftermarket parts supplier based in Guangdong, China, and is suitable for equipment requiring reliable, long-lasting performance in demanding environments such as mining, farming, and power generation.

Please verify your engine model and existing part number to ensure compatibility. This component is a common wear item during engine overhaul and is essential for restoring compression and reducing mechanical noise in Isuzu 4BG1 power units.

Key Features & Benefits

• Precision Engineering: Manufactured to OEM dimensional tolerances, ensuring a tight, accurate fit within the connecting rod small end and piston pin.
• Enhanced Durability: Constructed from high-strength, wear-resistant materials designed to withstand extreme loads and high operating temperatures common in diesel engines.
• Reduced Friction: The smooth, oil-retentive surface finish minimizes friction between the piston pin and connecting rod, improving overall engine efficiency.
• Direct Replacement: Sold as a standard OEM size component, making it ideal for standard engine rebuilds without the need for oversize machining.
• Wide Application: Suitable for Isuzu 4BG1 engines used in excavators, loaders, generators, marine engines, and agricultural tractors.
• Quality Tested: Each batch undergoes outgoing inspection and machinery test reports to verify dimensional accuracy and material integrity.
• Trusted Supply: Backed by a 6-month warranty and online technical support for peace of mind during installation and operation.

Technical Specifications

OEM Cross-Reference

This 4BG1 con rod bushing is designed to meet or exceed the specifications of the original Isuzu part. While specific OEM numbers may vary by production year and exact engine variant, this bushing is the direct replacement for the standard Isuzu 4BG1 connecting rod small end bushing. Common cross-reference numbers include:

• Isuzu 8-98023-526-0 (Typical reference for 4BG1 engine bottom end parts)
• Isuzu 8-97003-025-1 (Alternative reference for 4BG1 bushing)
• Compatible with all standard 4BG1 connecting rod assemblies

Note: We recommend comparing the dimensions (inner diameter, outer diameter, and length) of your existing bushing with this part to ensure a perfect match before installation.

Compatibility

This connecting rod bushing is specifically designed for the Isuzu 4BG1 diesel engine. This engine platform is commonly used for the following equipment types:

• Construction Machinery: Excavators (e.g., Isuzu-based mini excavators), wheel loaders, and backhoe loaders.
• Agricultural Equipment: Tractors, harvesters, and irrigation pumps.
• Industrial Power: Generator sets (Gensets) and air compressors.
• Marine Applications: Small to medium marine propulsion engines.
• Material Handling: Forklifts and telehandlers.

This bushing is commonly used for engine overhaul kits and rebuilds for the 4BG1 engine. Please verify your engine serial number to confirm fitment.

Global Supply & Distribution

We offer worldwide shipping to meet the demands of international B2B buyers. Our logistics network supports fast and reliable delivery to major ports and industrial centers across:

• North America: Los Angeles, Houston, Vancouver, Toronto
• Europe: Rotterdam, Hamburg, Antwerp, London
• Asia-Pacific: Singapore, Dubai, Sydney, Shanghai
• Middle East & Africa: Jebel Ali, Riyadh, Lagos, Nairobi
• South America: Santos, Buenos Aires, Valparaíso

Our export team has extensive experience handling international trade documentation, customs clearance, and bulk shipping. We provide flexible delivery options including FOB (Free on Board), CIF (Cost, Insurance, and Freight), and door-to-door courier services for smaller orders. Whether you need a single replacement part or bulk stock for a fleet maintenance program, we ensure your parts arrive on time and in perfect condition.

Quality Assurance

Every 4BG1 Con Rod Bush undergoes rigorous quality control to ensure it meets the high standards required for diesel engine performance. Our quality assurance process includes:

• Material Verification: All raw materials are sourced from certified suppliers and tested for hardness, tensile strength, and chemical composition.
• Dimensional Inspection: Each bushing is checked for precise inner/outer diameter and length to ensure a proper press-fit and clearance.
• Outgoing Video Inspection: We provide video inspection reports upon request, allowing you to verify the product quality before shipment.
• Machinery Test Report: A machinery test report is available to confirm the part’s performance under simulated load conditions.
• Warranty Support: This product is backed by a 6-month warranty against manufacturing defects. After the warranty period, our team continues to offer online technical support for any installation or performance questions.

FAQ

1. How do I know if this 4BG1 Con Rod Bush fits my engine?

This bushing is specifically manufactured for the Isuzu 4BG1 diesel engine. To confirm fitment, check your engine model number (typically stamped on the engine block) and compare it to the 4BG1 designation. Additionally, measure the inner diameter, outer diameter, and length of your existing bushing. If your engine uses a standard (non-oversize) connecting rod, this part should be a direct replacement. If you are rebuilding an engine with a machined rod, you may need an oversize bushing.

2. What is the recommended installation procedure for this bushing?

Installation should be performed by a qualified diesel mechanic. The bushing is typically pressed into the small end of the connecting rod using an arbor press or specialized tool. After installation, the bushing often requires a final hone to achieve the precise clearance required for the piston pin. Always lubricate the bushing with clean engine oil during assembly and check the piston pin rotation for smooth, free movement. Ensure the oil hole in the bushing aligns with the lubrication passage in the connecting rod.

3. Can I use this bushing in a high-hour engine without replacing the piston pin?

It is strongly recommended to replace the piston pin whenever you install a new con rod bushing. The piston pin and bushing wear together as a matched set. Reusing an old, worn piston pin with a new bushing can lead to accelerated wear, improper clearance, and potential engine knock. For best results, always replace the piston pin, bushing, and piston rings as part of a comprehensive top-end or bottom-end overhaul.