1. Car & Truck Engines Used/New Products
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  3. JOHN DEERE A4039R

JOHN DEERE A4039R Manifold

A4039r John Deere Aftermarket Manifold

( Brand: John Deere ), ( Manufacturer Part Number: A4039R ), ( Part Type: Manifold )

Review JOHN DEERE Aftermarket Manifold

The Deere & Company A4039R Manifold is an essential component of John Deere lawn tractors, specifically those with liquid-cooled engines. This manifold serves as a crucial connection point for various engine components, facilitating the smooth flow of coolant throughout the engineering system.

The A4039R Manifold is manufactured from high-quality materials, primarily cast iron, which provides excellent heat dissipation properties. Its robust design ensures durability and reliability, enabling the manifold to withstand the rigors of continuous use in lawn care applications.

This manifold features an intricate cooling system design, with multiple ports for coolant inlet and outlet. The inlet port allows coolant to enter the engine, while the outlet ports facilitate the removal of heated coolant. These ports are strategically placed to optimize cooling efficiency and ensure even distribution of coolant throughout the engine.

One of the standout features of the Deere A4039R Manifold is its compatibility with a wide range of John Deere lawn tractor models. It can be used in both gasoline and diesel engines, making it a versatile option for various tractor configurations. This broad applicability enhances the manifold's value to Deere customers, as it allows them to source a single part for use across multiple tractor models.

The A4039R Manifold is also designed with ease of installation in mind. It comes with all necessary hardware for attachment, ensuring a straightforward installation process. Additionally, the manifold's precise manufacturing ensures a perfect fit, minimizing the need for extensive modifications or adjustments during installation.

In summary, the Deere & Company A4039R Manifold is an essential engine component for John Deere lawn tractors, ensuring efficient cooling and reliable engine performance. Its robust design, versatility, and ease of installation make it an indispensable part of any tractor maintenance or repair project.

The Deere A4039R Manifold is a component used in John Deere tractors for cooling and exhaust systems. Here are some potential pros and cons that may help you make an informed decision about purchasing this manifold:

Pros:

1. High-quality construction: John Deere is known for its durable and reliable parts, and the A4039R Manifold is no exception. It is made from high-quality materials, ensuring long-lasting performance.

2. Improved cooling system: The manifold plays a crucial role in the cooling system of a tractor. By replacing a worn-out or damaged manifold, you can improve the overall cooling efficiency of your tractor, which can lead to better performance and longer engine life.

3. Enhanced exhaust system: The manifold also affects the exhaust system of a tractor. A new manifold can help reduce exhaust emissions and improve fuel efficiency by ensuring a proper flow of exhaust gases.

4. OEM compatibility: The A4039R Manifold is an original equipment manufacturer (OEM) part, which means it is specifically designed and engineered for use in John Deere tractors. This ensures a precise fit and optimal performance.

Cons:

1. Cost: Replacing a manifold can be a significant investment, especially if it is not covered under warranty. The cost of the A4039R Manifold may be a deterrent for some tractor owners.

2. Installation complexity: Installing a new manifold can be a complex process that requires specialized tools and knowledge. It may be necessary to hire a professional mechanic to install the manifold, which can add to the overall cost.

3. Potential for other issues: Replacing a manifold may not address all potential issues with your tractor's cooling or exhaust system. Other components, such as the radiator or exhaust valves, may also need to be inspected and replaced.

Conclusion:

The Deere A4039R Manifold is a high-quality, OEM part that can help improve the cooling and exhaust systems of your John Deere tractor. However, it comes with a significant investment and installation complexity. If you are experiencing issues with your tractor's cooling or exhaust system, it may be worth considering the benefits of a new manifold, but it is essential to weigh the costs and potential for other underlying issues.

Recommendation:

Before purchasing a new manifold, it is recommended that you have your tractor inspected by a qualified mechanic to determine the root cause of any cooling or exhaust system issues. They may be able to identify other components that need to be replaced or suggest alternative solutions to improve your tractor's performance. If a new manifold is the best option, make sure to purchase from a trusted dealer or supplier to ensure authenticity and quality.

Details:

Aftermarket A4039R Manifold: Part Number: Manufacturer: John Deere. Designed specifically for trucks, trailers, and buses. Manufactured following strict OE standards to work like the original component. Made of high-quality components for durability, reliability, and performance.

Engineered using the latest technology to ensure product lasts longer in service. Engineered with a factory-like design for effortless installation, ensuring perfect match your vehicle.

part #: a4039r prices

  • $75.00-$155.99

specifications grokengines:

  • brand: John Deere
  • mpn: A4039r
  • part type: Manifold

offer grokengines:

  • sold: 0
  • quantity: 2
  • started: November 4, 2025
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  • options: Ship-to-home
  • availability: In Stock

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  • Car Truck Parts Accessories > Engines Engine Parts > Engines

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  • rating: 98.6%
  • city: Los Angeles, California
  • # reviews: 57410
part type: manifold,
category: auto parts > car truck parts accessories > engines engine parts > engines, sku: 6429229840168611,

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5 offers $75.00–$155.99 USD
  • Offer #1: $75.00 price + $18.00 shipping estimate = $93.00* total.+$18.00 shipping
  • Offer #2: $155.99 price + $0.00 shipping estimate = $155.99* total. Lawn & Garden. Replaces Part Numbers: A3386R,.FREE SHIPPING
  • Offer #3: $155.99 price + $0.00 shipping estimate = $155.99* total. Replaces Part Number(s):.FREE SHIPPING
  • Offer #4: $155.99 price + $0.00 shipping estimate = $155.99* total. Part Details.FREE SHIPPING
  • Offer #5: $109.12 price + $21.95 shipping estimate = $131.07* total. MANIFOLD.+$21.95 shipping

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