New Isuzu 2.3L 4ZD1 Cylinder Head – Built for Trooper II and Pickup (1986-1993) Valves and Springs Only

This head comes valves and springs only you must re-use your camshaft and rocker assembly.

Restore your Isuzu Trooper II or Pickup’s engine performance with this New 2.3L 4ZD1 Cylinder Head. Specifically designed for 1986-1993 Isuzu models, this cylinder head meets OEM specifications, providing a precise fit and reliable operation. Crafted from high-quality materials, it enhances engine efficiency, power, and fuel economy, making it an ideal replacement for worn or damaged cylinder heads in the 4ZD1 engine. A core return is required for this purchase.

Fitment and Compatibility
This cylinder head is built for direct fitment in the Isuzu Trooper II and Pickup models equipped with the 2.3L 4ZD1 engine:

• Isuzu Trooper II: Compatible with 1986-1993 models featuring the 2.3L 4ZD1 engine.
• Isuzu Pickup: Suitable for 1986-1993 models with the 2.3L 4ZD1 engine.

---

Product Features

1. OEM-Quality Design and Fitment
Manufactured to original equipment manufacturer (OEM) standards, this cylinder head offers a seamless fit, restoring the original performance of your engine. With precision machining and assembly, it provides reliable operation for your Isuzu’s 2.3L 4ZD1 engine.

2. Improved Airflow and Fuel Efficiency
Optimized for efficient airflow and combustion, this cylinder head helps increase fuel efficiency and engine power. Ideal for those looking to bring back the original performance of their vehicle, it enhances throttle response and overall engine smoothness.

3. Durable, Long-Lasting Construction
Crafted from high-quality aluminum, this cylinder head is engineered to withstand extreme temperatures and engine pressures. Whether used for everyday driving or light off-road conditions, it provides long-lasting durability and reliability for your Isuzu.

4. Rigorous Quality Control and Testing
Each cylinder head undergoes strict quality control, including pressure testing and crack inspections, to ensure it meets the highest standards. This level of quality assurance guarantees dependable performance and peace of mind for your replacement part.

---

Specifications

• Engine Compatibility: Isuzu 2.3L 4ZD1 engine for Trooper II and Pickup (1986-1993)
• Material: High-strength aluminum construction
• Testing: Pressure tested and inspected for defects
• Includes: Fully assembled cylinder head with valve guides and seals

---

Benefits of Choosing Our New Isuzu 2.3L 4ZD1 Cylinder Head

• Restores Engine Power and Efficiency: Replacing a worn or damaged cylinder head helps bring your engine’s performance back to factory levels, enhancing power and fuel economy.
• Built for Durability: Made from quality materials, this cylinder head is designed to withstand the demands of daily driving, off-road use, and more.
• Easy Installation: The OEM design provides a direct fit, making installation quick and hassle-free for mechanics and DIY enthusiasts alike.
• High-Quality Manufacturing: Precision-engineered to meet OEM specifications, ensuring long-term reliability and performance.

---

Ideal Applications

This cylinder head is ideal for Isuzu Trooper II and Pickup owners needing a dependable replacement for the 2.3L 4ZD1 engine. Perfect for restoring engine performance in vehicles from 1986-1993, it offers reliable operation and fuel efficiency for both everyday and off-road use.

---

Installation and Warranty Information

Our New Isuzu 2.3L 4ZD1 Cylinder Head is crafted for a precise fit, making installation straightforward. Professional installation is recommended for optimal results. This product is backed by a two-year warranty, providing added confidence in its quality and longevity.

---

Order Today for Reliable Engine Performance

Upgrade your Isuzu Trooper II or Pickup with this New 2.3L 4ZD1 Cylinder Head. Built to OEM specifications, it’s designed to restore performance and efficiency in your Isuzu’s 2.3L engine. Order now and enjoy our two-year warranty for peace of mind.

---

Heavy Duty Parts Company – Core Returns Policy

Effective December 17, 2025

At Heavy Duty Parts Company, core returns are essential to our ability to provide high-quality, cost-effective cylinder heads. Returned cores supply critical components—such as keepers, springs, and retainers—that are vital to proper engine performance and allow us to maintain OEM-level quality.

No Upfront Core Charge

Unlike many suppliers, we do not charge a core fee upfront. Instead, we rely on customers to return their used cores within the required timeframe.

Core Return Requirements

• Cores are due within 30 days of the purchase date

• If a core is not returned within 60 days, the product warranty is void

• Unreturned cores will be charged as follows:

  • Cylinder heads under $600: $200 per unreturned core

  • Cylinder heads $600 and above: $400 per unreturned core

Customers needing additional time may contact us to request an extension. Approved extensions will prevent core charges from being applied.

Core Return Process

Cylinder heads are shipped with prepaid core return labels included in packets attached to the outside of each box. If labels are missing, customers should contact us for replacements prior to returning the core.

Core Eligibility

Some cylinder heads do not require a core return. In certain cases, core requirements may be waived at our discretion.

Why Core Returns Matter

• Reused core components help maintain OEM-quality standards

• Core returns allow us to keep pricing competitive

• Recycling cores supports sustainability by reducing waste and conserving resources

This policy applies to all purchases made on or after December 17, 2025.

Send Back All Components

To ensure the quality and integrity of our remanufacturing process, we ask that you return all components that were originally included with your new cylinder head. This includes items such as:

• Rocker arms
• Camshafts (if applicable)
• Any other hardware that came with your purchase

Easy & Free Core Return Process

• Each purchase includes a prepaid core return label in a plastic sleeve on the box.
• Simply pack your core with all included components, attach the label, and drop it off with the carrier—no extra cost to you.
• Returned cores undergo inspection and recycling, ensuring maximum efficiency.

Customer Partnership & Sustainability

By returning your core and its components, you help maintain a reliable supply chain, ensuring we can continue offering top-quality products at the best prices. This process not only benefits your wallet but also contributes to a greener and more efficient automotive industry.

We appreciate your support in keeping our business and the industry running smoothly!

Shop

Isuzu