Maya Ellison
The Ford Crown Victoria is a car model that has been in production since at least 1992. While not all Crown Victorias have plastic intake manifolds, some models do. The 1992-1995 Crown Victorias used a solid aluminum intake manifold, while later models, including the 2004 Crown Victoria, have a plastic intake manifold. Owners of the Crown Victoria have expressed concerns over the durability of the plastic intake manifold, with some opting for full metal intake manifolds instead.
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What You'll Learn
- The 1992-1995 Ford Crown Victoria used a solid aluminium intake manifold
- Plastic intake manifolds are prone to leaking
- The OEM intake manifolds tend to hold up for at least 10 years or 80,000 miles
- Aftermarket intake manifolds are available for the Ford Crown Victoria
- The stock intake manifold is the best one, even if it's plastic
The 1992-1995 Ford Crown Victoria used a solid aluminium intake manifold
The Ford Crown Victoria is a popular car, with many enthusiasts. The intake manifold is a critical component of the vehicle's engine, responsible for distributing air or a mixture of air and fuel to each cylinder head intake port. This process enhances the output power and performance of the engine.
The intake manifold is a wear item, and eventually, all need to be replaced. The manifold can break and spray coolant over the spark plugs, which can be difficult to fix. It is possible to replace the manifold yourself, but it can be a time-consuming process. It is important to note that a recycled or second-hand manifold may not be a good option, as you do not know how much life is left in the part, and it may fail soon after installation.
There are a variety of replacement intake manifolds available for the Crown Victoria, including OEM and aftermarket options. Aftermarket manifolds are generally less expensive than OEM parts, but it is important to ensure that any replacement part matches the specifications of the original to ensure a perfect fit and maintain the performance of the vehicle.
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Plastic intake manifolds are prone to leaking
Additionally, many manifolds are two-piece assemblies, so leaks can occur where the upper and lower halves of the manifold join. While hairline cracks typically do not cause engine failure, they can lead to issues with idling, fuel mixture, drivability, and emissions. Vacuum leaks (air leaks) in the intake manifold disrupt the engine management system's ability to maintain the correct air-fuel ratio, potentially resulting in a lean misfire, rough idle, hesitation when the throttle opens, and increased emissions. Small leaks tend to have a more significant impact at idle, while large leaks in individual intake runners can cause a cylinder to run dangerously lean, increasing the risk of detonation and damaging pistons or valves.
To check for leaks in a plastic intake manifold, pressure testing is recommended when the manifold is off the engine. Alternatively, penetrating dyes, such as ultraviolet dye, can be used to make cracks more visible, especially on black plastic manifolds. If the manifold is still on the engine and exhibits signs of malfunction, such as idle misfire, rough idle, or lack of power, it may be drawing air through a crack. In this case, you should inspect the gasket or sealer between the upper and lower halves of the manifold and the intake manifold gaskets where they mate with the head. Additionally, check all vacuum connections and hoses for any signs of unmetered air entering the engine. If no obvious leaks are found, the manifold may have a hairline crack.
To confirm a crack in a plastic manifold when it is still on the engine, one method involves starting the engine and letting it idle while feeding propane gas through a hose along all mating surfaces, seams, and flanges. If the idle suddenly smooths out, it indicates that a crack is drawing in the propane gas. Another technique used by professionals is to inject low-pressure mineral vapor into the intake manifold using a "smoke machine" with optional UV dye to make leaks easier to spot. If a leak is detected, the manifold can be replaced, the leak can be sealed with epoxy or RTV silicone, or the plastic can be welded with a high-temperature heat gun and compatible plastic filler material.
While plastic intake manifolds have had issues with leaking, it is worth noting that modern plastic intake manifolds have been improved with engineered compounds that enhance strength and elasticity. These advancements have significantly reduced failure rates and improved long-term reliability, making them a more viable option today.
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The OEM intake manifolds tend to hold up for at least 10 years or 80,000 miles
The Ford Crown Victoria is a popular car model that has been in production since the 1990s. Over the years, different materials have been used for its intake manifolds, including cast iron, aluminum, and plastic. While plastic intake manifolds are known to be durable, they are still prone to leaks and cracks over time due to aging and brittleness.
The OEM intake manifolds, which are made of plastic, tend to hold up for at least 10 years or 80,000 miles, whichever comes first. This means that, on average, they are designed to last for a significant portion of the vehicle's lifespan before requiring replacement. However, some owners have reported leaks and cracks in their plastic intake manifolds, which can be a common issue for this component.
When it comes to replacing the intake manifold, there are a few options available. Some people may choose to purchase a new OEM part, which can be done through authorized dealers or online retailers. Others may opt for used or aftermarket parts, which can be more affordable but may come with risks related to quality and compatibility. It is important to note that not all intake manifolds are created equal, and modifications may be necessary to ensure a proper fit.
For those seeking a more durable solution, full metal intake manifolds are available, such as the Edelbrock Jr. and the now-discontinued Typhoon. These options may be more expensive, but they offer peace of mind as they are less likely to degrade over time compared to plastic alternatives. Additionally, aluminum intake manifolds are also an option, although they may require more extensive modifications for installation.
In summary, while the OEM plastic intake manifolds in the Ford Crown Victoria are designed to last for a considerable period, they may eventually need replacement due to leaks or cracks. When making a replacement, it is important to consider the various options available, including new OEM parts, used or aftermarket parts, or upgrading to full metal or aluminum manifolds for enhanced durability.
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Aftermarket intake manifolds are available for the Ford Crown Victoria
Aftermarket intake manifolds are widely available for the Ford Crown Victoria. These manifolds are designed to be reliable replacements for the original equipment and are manufactured to match the fit, function, and performance of the factory-fitted manifolds.
Aftermarket manifolds are offered by several retailers, including Advance Auto Parts, eBay Motors, and AutoZone. These manifolds are designed to fit specific Ford Crown Victoria models, with some retailers offering a complete kit that includes the manifold, auxiliary coolant fitting, thermostat, gaskets, O-ring, and self-tapping screws. It is important to note that not all intake manifolds are created equal, and some aftermarket options may not be as reliable as others.
When considering an aftermarket intake manifold, it is essential to prioritize quality and reliability. Some aftermarket manifolds may be made of plastic, which has been known to be less durable and may need to be replaced more frequently. For example, the plastic intake manifold on the 4.6L V8 engine of the Ford Crown Victoria is notorious for failing and spraying coolant over the spark plugs, causing significant hassle and difficulty in repairs.
To avoid frequent replacements and potential engine damage, it is recommended to opt for a more durable option, such as a racing metal intake manifold. This type of manifold may offer increased durability and better performance, although it is important to note that installation can be more complex, as evidenced by ChrisFix's video demonstrating the process on a 4.6L Mustang engine.
In summary, while there are aftermarket intake manifolds available for the Ford Crown Victoria, it is important to carefully consider the quality and material of the manifold to ensure reliable performance and minimize the need for frequent replacements.
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The stock intake manifold is the best one, even if it's plastic
The stock intake manifold is the best option for your Ford Crown Victoria, even if it is made of plastic. While some people may have concerns about the use of plastic in intake manifolds, there are several advantages to using this material.
Firstly, plastic is a lightweight material, which can improve the efficiency of your vehicle. The reduced weight can lead to better fuel economy and improved handling. Additionally, plastic is a highly mouldable material, allowing for more complex shapes and designs. This can result in improved airflow and performance in the intake manifold.
Another benefit of plastic intake manifolds is their durability. Plastic manifolds are designed to withstand the high temperatures and pressures present in the engine compartment. They are also less susceptible to warping and corrosion compared to metal alternatives. While plastic can become brittle over time due to heat, proper cooling and maintenance can help prevent this issue.
Furthermore, plastic intake manifolds are often precision-engineered and tested to ensure top-quality construction and reliability. They are designed to match the fit and function of the original stock manifold, making them a perfect replacement option. This compatibility ensures convenient and trouble-free installation, saving time and labour costs.
Although some people may suggest using a metal intake manifold, it's important to note that even vehicles with metal manifolds can experience intake-related problems. Additionally, metal manifolds may be more challenging to install and could require modifications to fit properly.
In conclusion, while the stock plastic intake manifold may eventually need replacement, it remains the best option for your Ford Crown Victoria. It offers advantages in weight, mouldability, durability, and compatibility, making it a reliable and efficient choice.
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Frequently asked questions
No, not all Crown Victorias have plastic intakes. The 1992-1995 models used a solid aluminum intake manifold. However, the later models, such as the 2004 Crown Victoria, have a combination of plastic and cast parts.
Plastic intakes are known to be prone to leaking and breakage. They may also need to be replaced more frequently than metal intakes.
Yes, there are full-metal intake manifolds available as alternatives. These include the Edelbrock Jr and the now-discontinued Typhoon, which can be purchased second-hand.
Replacement intake manifolds for the Crown Victoria can be found at Advance Auto Parts, both online and in local stores.
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