Product Details

Product Overview

This high-quality Isuzu 4JB1 Cylinder Block is a direct replacement for the original OEM component. Manufactured to strict tolerances, this engine block serves as the core foundation for rebuilding or repairing Isuzu 4JB1 diesel engines. Designed for global distribution, this part is readily available for shipment to major industrial centers in North America, Europe, Asia-Pacific, the Middle East, and Africa. Ideal for B2B buyers, mechanics, and equipment distributors requiring a reliable, long-lasting engine core.

Key Features & Benefits

• OEM-Grade Quality: Manufactured using high-strength cast iron to ensure dimensional stability and resistance to wear under high compression.
• Precision Engineering: Machined to exact OEM specifications for perfect alignment of the crankshaft, pistons, and cylinder head.
• Enhanced Durability: Features reinforced webbing in the main bearing area to withstand the stresses of turbocharged applications.
• Corrosion Resistance: Treated with an anti-rust coating to protect the internal surfaces during storage and transport.
• Drop-in Ready: Includes freeze plugs and main bearing caps, reducing assembly time for rebuilders.

Technical Specifications

OEM Cross-Reference

This cylinder block is a direct replacement for the following Isuzu OEM and cross-reference part numbers:

• Primary OEM: 8-98023-526-0
• Alternative OEM: 8-98023-525-0, 8-98023-527-0
• Engine Casting Number: 4JB1-1002001

Compatibility

This engine block is specifically designed for the Isuzu 4JB1 diesel engine. Common applications include:

• Forklifts: TCM, Nissan, Toyota (with 4JB1 retrofit)
• Construction Equipment: Isuzu Excavators (model 40-5 series), Air Compressors
• Generator Sets: Industrial generators powered by the 4JB1 engine
• Vehicle Models: Isuzu N-Series trucks (NPR/NKR), Isuzu Rodeo (early models)

Note: Please verify your engine block casting number to confirm fitment before purchase.

Global Supply & Distribution

We maintain a robust global supply chain to ensure fast delivery to all major markets:

• North America: In-stock for expedited shipping to Los Angeles, Houston, Chicago, and Toronto.
• Europe: Regular shipments to Rotterdam, Hamburg, and Felixstowe.
• Asia-Pacific: Direct shipping from manufacturing hubs to Singapore, Dubai, and Sydney.
• Middle East & Africa: Reliable delivery to Jebel Ali (Dubai), Dammam, and Durban.

Trade Compliance: All products are exported with full commercial invoices and comply with international trade regulations. We offer FOB, CIF, and DDP terms to meet your logistics requirements.

Quality Assurance

Every cylinder block undergoes rigorous quality control to meet international standards:

• Certification: ISO 9001:2015 certified manufacturing facility.
• Testing: 100% pressure tested for water jacket leaks; hardness tested to ensure material consistency.
• Warranty: 12-month warranty against manufacturing defects. Covers material and workmanship issues.
• Inspection: Dimensional inspection using CMM (Coordinate Measuring Machine) to guarantee OEM tolerances.

FAQ

Q1: Is this cylinder block a direct fit for my Isuzu 4JB1 engine, or do I need additional modifications?
A: This block is a direct replacement for the 4JB1. It includes main bearing caps and freeze plugs. However, you will need to transfer your existing crankshaft, pistons, and cylinder head from your old engine. No machining is required if your parts are standard size.

Q2: What is the recommended maintenance before installing a new cylinder block?
A: Before installation, we recommend cleaning the oil galleries with compressed air and solvent to remove any manufacturing debris. Always use new gaskets and seals. Torque the main bearing caps to the OEM specification of 95-105 Nm (70-77 lb-ft) using assembly lube.

Q3: Can this block be bored oversize if my pistons are worn?
A: Yes, the 4JB1 block is designed to be rebored. It can typically be bored to +0.50mm or +1.00mm oversize. The cylinder wall thickness is sufficient for one standard oversize rebore. We recommend consulting with a professional machine shop to verify wall thickness before boring.

Our advantages

1.An authorized wholesaler of Isuzu genuine parts, Hino genuine parts, Mitsubishi genuine parts and Mahle parts.

2. We are not only supply genuine parts, but also high quality OEM parts, which are made in China or made in Japan.

3. More than 10 years of experience in machinery parts, professional supply of diesel engine parts.

4. Fast delivery, the fastest can be shipped in one day ,more than 500,000 of different types parts in stock.

5. Scientific ERP system, easy and fast to locate the parts that customer needs.

6. Professional technician checks the parts before delivery, to make sure the parts are correct, usable and defect-free.

Exhibition

Packing&Shipping

1.  Our shipment is by air/sea/express (DHL/FEDEX/TNT/UPS/EMS).

2.  Once we get confirmation of payment, we will ship products in 2 days.

3.  Our packaging is standard export wooden box or others as your requirement.

4. We’ll check and test the products before shipping , and givethe pictures to our customers to confirm.

FAQ

Q1. What is your company major products?

A: Our main products are Liner kit, Piston, Rings, Liner, Gasket kit, Bearing, Injection pump, Nozzle, Water pump, Oil pump,Crankshaft, Turbocharger,Filter, etc.

Q2.What is the MOQ?

A: Normally we can supply any quantity if we have in stock.

Q3. What is your payment term ?

A: We accept Western Union, T/T, Paypal.

Q4. What is the packing ?

A: Carton or wooden case , If you want to put your logo on the packing , We will do it after get your authorization letter.

Q5. When can you deliver products after payment ?

A: By Express ,usually might take 3-4 days ;By Air , Usually take 7-9 days ; By Sea ,usually take 1-2 months .

Q6. What can you do to complete order perfectly ?

A: In the beginning , We will communicate with clients in details to understand what they need .

Before packing , We will check the products and send photos to clients .After confirmation ,

We will packing products well to avoid damage . Once we get tracking number ,

We will send it to customer and keep contact in with clients .