11Z Main Bearing & Connecting Rod Bearing 11701-78300 for Toyota Diesel Engine Parts

Product Details

Product Overview

This precision-engineered set includes the main bearing and connecting rod bearing (part number 11701-78300) specifically designed for the Toyota 11Z diesel engine. As a critical component within the engine’s rotating assembly, this bearing set ensures proper crankshaft support and connecting rod alignment, reducing friction and wear for extended engine life.

Manufactured to OEM size specifications, these bearings are an ideal replacement for heavy-duty applications commonly found in construction equipment, industrial machinery, agricultural tractors, marine gensets, and material handling vehicles. The 11Z engine platform is known for its reliability, and using high-quality bearings is essential for maintaining performance and preventing catastrophic engine failure.

This product is commonly used as a direct replacement for the original Toyota part number 11701-78300, ensuring a precise fit within the engine block and connecting rod assembly. Please verify your engine model and application requirements before installation.

Key Features & Benefits

• OEM-Specification Dimensions: Manufactured to match the exact size and tolerances of the original Toyota 11Z engine bearings, ensuring a proper crush and clearance for reliable oil film retention.
• Enhanced Durability: Constructed from high-strength materials designed to withstand the high loads and temperatures of diesel engine operation, reducing the risk of bearing spin or seizure.
• Complete Set Convenience: This package includes both main and connecting rod bearings, simplifying the ordering process for a full engine rebuild or overhaul.
• Reduced Friction & Wear: Precision-machined surfaces provide an optimal oil wedge, minimizing friction between the crankshaft journals and connecting rods for improved fuel efficiency and engine longevity.
• Rigorous Quality Control: Each bearing undergoes outgoing inspection, including video documentation, to verify dimensional accuracy and surface finish before shipment.
• Versatile Application: Suitable for a wide range of industrial sectors, including construction, agriculture, marine, and power generation, making it a versatile stock item for parts distributors.

Technical Specifications

OEM Cross-Reference

This bearing set is designed as a direct replacement for the following original equipment manufacturer part numbers. Cross-reference your existing part to confirm compatibility.

• Toyota OEM: 11701-78300
• Alternative Reference: 11Z Main Bearing Set
• Alternative Reference: 11Z Connecting Rod Bearing Set

Note: This list is based on the primary part number provided. Always verify your engine’s specific requirements.

Compatibility

This product is specifically engineered for the Toyota 11Z diesel engine. Based on the engine model, it is commonly used for the following applications:

• Construction: Excavators, Loaders, and Compact Track Loaders
• Industrial: Forklifts, Aerial Work Platforms, and Compressors
• Agriculture: Tractors and Harvesters
• Marine: Auxiliary engines and small vessel propulsion
• Power Generation: Genset drive engines
• Material Handling: Cranes and Telehandlers

Important: Fitment is inferred from the engine model. Please confirm that your equipment utilizes the Toyota 11Z diesel engine before purchase.

Global Supply & Distribution

We offer worldwide shipping capabilities to support international B2B buyers and parts distributors. Our logistics network ensures fast, reliable delivery to major ports and industrial centers globally.

• Major Markets Served: North America (USA, Canada, Mexico), Europe (EU & UK), Asia-Pacific (Japan, Korea, Australia, Southeast Asia), Middle East (UAE, Saudi Arabia), and Africa.
• Export Experience: Our team is experienced in international trade compliance, including proper documentation for customs clearance, certificates of origin, and commercial invoicing.
• Shipping Options: We offer a range of shipping methods from express couriers (DHL, FedEx, UPS) for small orders to sea freight (FCL/LCL) for bulk shipments to reduce per-unit costs.
• Lead Time: Standard orders are processed and dispatched within 3-7 business days, depending on stock levels and order quantity.

Quality Assurance

We are committed to providing high-quality replacement parts that meet the demands of professional use.

• Manufacturing Standards: Components are manufactured in ISO-certified facilities in Guangdong, China, following strict quality control protocols.
• Testing Procedures: Each batch undergoes dimensional inspection to ensure they meet OEM tolerances. A Machinery Test Report is available upon request to verify material composition and hardness.
• Warranty: This product is backed by a 6-month warranty against manufacturing defects in materials or workmanship, providing peace of mind for your investment.
• Inspection: Video Outgoing Inspection is provided, allowing you to visually confirm the quality of the bearings before they are shipped.

FAQ

Q: How do I confirm that part number 11701-78300 fits my 11Z engine?
A: The part number 11701-78300 is the standard OEM number for the Toyota 11Z engine main and rod bearing set. You should first check the casting or stamping on your old bearing or consult your engine’s parts manual. If your engine uses a standard (non-undersize) bearing and is a Toyota 11Z model, this set is the correct replacement. If your crankshaft has been ground, you will need an undersize bearing set.

Q: What is the recommended installation procedure for these bearings?
A: Installation requires mechanical expertise. Ensure the bearing journals on the crankshaft and inside the connecting rods are clean and free of debris. Apply clean engine oil to the bearing surfaces before assembly. Torque the main bearing caps and connecting rod caps to the manufacturer’s specifications using a calibrated torque wrench. It is critical to check the bearing clearance using Plastigage to ensure it falls within the specified range (typically 0.02-0.06 mm for diesel engines).

Q: Can I use these bearings in a high-horsepower or turbocharged 11Z application?
A: These bearings are manufactured to standard OEM specifications. For stock or mildly tuned 11Z engines used in standard industrial or agricultural applications, they are suitable. For high-performance, turbocharged, or heavily modified engines generating significantly more power, we recommend consulting with a specialist to determine if a performance-grade bearing with different material composition is required to handle the increased load.