The 1973 Nissan Pickup, commonly known as the Datsun 620 in some markets, has long been admired for its durability, simplicity, and classic styling. However, if you’re looking to bring your truck into the modern age with significantly more power and performance, swapping out the stock engine for a modern LS engine is a fantastic upgrade. The LS engine family, with its reputation for high performance, reliability, and ease of modification, has become the engine of choice for many enthusiasts.
This article provides a detailed, step-by-step guide to performing an 73 nissan pu ls swap engine Pickup. From initial considerations to the step-by-step installation process, we’ll explore the essentials of this exciting modification.
Why Choose an 73 nissan pu ls swap engine?
The Nissan Pickup 1973 comes with a variety of factory engine options, including a small inline-four or a six-cylinder, all of which provide modest power for their time. Swapping in an LS engine—whether it’s the LS1, LS3, or any other variant—offers a significant increase in horsepower and torque, often doubling or even tripling the original engine’s performance.
For example, an 73 nissan pu ls swap engine provides around 350 horsepower and 365 lb-ft of torque, which is more than enough to transform the truck into a modern powerhouse. If you want even more performance, the LS3 offers 430 horsepower, and the LS7 can reach up to 505 horsepower.
Proven Reliability
One of the key advantages of LS engines is their exceptional reliability. The LS family has earned a reputation for being durable, with many examples running well beyond 200,000 miles with proper maintenance. This durability is particularly advantageous if you’re planning to use the truck as a daily driver or want to keep it running for many years to come.
Modern Technology and Efficiency
In addition to the performance gains, LS engines benefit from modern technologies that improve efficiency and reduce emissions compared to older engines. These engines often deliver better fuel economy than the original engine in your 1973 Nissan Pickup, despite the substantial increase in power.
Ease of Maintenance and Parts Availability 73 nissan pu ls swap engine
Since the LS engine is used in numerous GM vehicles, there’s an abundance of replacement parts available. If any issues arise down the road, sourcing parts for an LS engine is easy and affordable compared to older, rarer engine options. The widespread popularity of the LS family also means there are many aftermarket upgrades available, allowing you to further improve performance or efficiency over time.
Aftermarket Support
Perhaps one of the most compelling reasons to swap an LS engine into your 1973 Nissan Pickup is the extensive aftermarket support. Countless manufacturers produce custom parts, engine mounts, wiring harnesses, and other components specifically designed to make LS swaps into various vehicles, including your Nissan Pickup.
Preparing for the LS Engine Swap
Choosing the Right LS Engine
The LS engine family includes various options, each with different power outputs, performance characteristics, and prices. Here’s a breakdown of some popular choices for your swap:
- LS1: The LS1 is one of the most common LS engines, found in vehicles like the Chevrolet Corvette and Pontiac GTO. With 350 horsepower and 365 lb-ft of torque, it offers a significant upgrade over the original engine in the 73 nissan pu ls swap engine, while remaining manageable for daily driving.
- LS3: If you’re looking for more power, the LS3 is an excellent option. With 430 horsepower and 424 lb-ft of torque, it provides an exciting boost in performance, suitable for those looking to push their Nissan Pickup to new heights.
- LS7: Found in high-performance vehicles like the Chevrolet Corvette Z06, the LS7 offers 505 horsepower and 470 lb-ft of torque. This engine is ideal for enthusiasts who crave extreme performance in their truck.
- LS9: For a supercharged option, the LS9 provides an astounding 638 horsepower and 604 lb-ft of torque. It’s a perfect choice if you want to make your Nissan Pickup a true performance machine.
Each of these engines has its advantages, depending on your budget and performance goals. If you want a balance of cost and power, the LS1 or LS3 is a great choice. For maximum performance, the LS7 and LS9 are the way to go.
Budgeting for the Swap
An LS engine swap is a major investment, so it’s essential to plan your budget carefully. Costs can vary depending on the engine you choose, as well as whether you’re buying new or used parts.
Engine Cost
A used LS engine can range from $2,000 to $5,000, depending on its condition and specific model. New LS crate engines typically start around $5,000 and can go upwards of $12,000 for high-performance variants.
Swap Kit
While custom engine mounts and other swap components can be sourced individually, many companies offer complete swap kits designed for the 1973 Nissan Pickup. These kits generally cost between $500 and $2,000.
Additional Parts 73 nissan pu ls swap engine
You’ll need various other components, including a new fuel system, wiring harness, radiator, exhaust system, and more. These additional parts can add up, with costs ranging from $500 to $2,500 or more, depending on the quality and brand.
Overall, the total cost of an LS engine swap can range from $4,000 to $15,000 or more, depending on the engine and parts you choose. Be sure to factor in labor costs if you’re not performing the swap yourself.
Tools and Equipment
Performing an LS swap requires access to a wide range of tools, including:
- Engine Hoist: You’ll need an engine hoist to remove the old engine and install the new one. A 1-ton hoist is usually sufficient for this type of work.
- Torque Wrench: This tool is crucial for tightening bolts to the correct specifications, especially when securing the engine and transmission.
- Impact Wrench: An impact wrench helps speed up the process of removing bolts and fasteners.
- Welding Equipment: Custom exhaust components or engine mounts may require welding. A MIG welder is commonly used for these types of jobs.
- Jack and Jack Stands: You’ll need to lift the truck to remove components from beneath the vehicle. A good jack and sturdy jack stands are essential for safety.
The Process of Installing an LS Engine in a 1973 Nissan Pickup
Removing the Stock Engine
The first step in the swap is to remove the original engine from the truck.
- Disconnect the Battery: Always start by disconnecting the battery to avoid electrical accidents.
- Drain Fluids: Remove all fluids, including oil, coolant, and transmission fluid.
- Remove Components: Take out the radiator, air intake, and any other components obstructing access to the engine.
- Disconnect Wiring: Unplug the wiring harness, disconnect the fuel lines, and remove any electrical connections to the engine.
- Unbolt the Engine: Unbolt the engine from its mounts and lift it out using the engine hoist.
Installing the LS Engine
With the original engine removed, you can begin the installation of the LS engine.
- Install Engine Mounts: Install the custom engine mounts designed for the 73 nissan pu ls swap engine. These mounts are available from various aftermarket suppliers and will allow the LS engine to be secured in the engine bay.
- Attach the Transmission: Depending on your choice of transmission (manual or automatic), you may need an adapter to mate it with the LS engine. Common transmission options for LS swaps include the 4L60E and 4L80E automatics or a T56 manual transmission.
- Wiring: Use a standalone wiring harness designed for LS swaps. This will connect the LS engine’s components to your truck’s electrical system. You’ll also need a custom ECU to run the engine, such as the Holley Terminator X, which is a popular choice for LS swaps.
Fuel System and Exhaust
The LS engine requires a returnless fuel system, so you will need to upgrade your truck’s fuel system to accommodate the new engine.
- Fuel Tank and Lines: Install a fuel tank and fuel lines that are compatible with the LS engine’s requirements.
- Exhaust System: LS engines generally require custom exhaust headers and pipes. Many swap kits include headers that are specifically designed to fit your Nissan Pickup, but custom exhaust work may still be necessary to achieve a perfect fit.
Cooling and Other Systems
The LS engine runs much hotter than the stock engine, so it’s crucial to upgrade the cooling system.
- Radiator: Install a high-performance radiator capable of handling the heat produced by the LS engine. Aluminum radiators are a popular choice for this type of swap.
- Cooling Fans: Install high-flow electric cooling fans to help maintain optimal operating temperatures.
Testing and Final Checks 73 nissan pu ls swap engine
After all the components are installed, perform the following checks:
- Double-Check Connections: Ensure that all wiring, fuel lines, and exhaust components are securely connected.
- Start the Engine: Fire up the engine and check for leaks or issues. Listen for any strange noises and ensure the engine is running smoothly.
- Test Drive: Take your truck for a test drive to check the performance, transmission shifts, and braking. Make any necessary adjustments to improve drivability.
Conclusion
73 nissan pu ls swap engine is a thrilling way to modernize your classic truck, bringing it up to date with modern power, performance, and reliability. While the process involves a significant investment of time and money, the results are well worth the effort. Whether you choose a mild LS1 or a high-performance LS7 or LS9, you’ll enjoy a truck that delivers incredible performance and reliability for years to come.
With the right preparation, tools, and support, you can successfully complete the LS swap and enjoy the benefits of a truly unique, high-performance Nissan Pickup.