MOPAR 68378400AC Vapor Tube

( Manufacturer Part Number: 68378400AC ), ( Part Type: Tube ), ( Parts Included: Only Part Reference 5 On The Diagram Is Included ), ( Genuine Oem: Yes ), ( Replaces Part Number: 68378400ab ), ( Universal Fitment: Direct Replacement )

Review MOPAR Genuine Vapor Tube

The **Mopar 68378400AC Vapor Tube** is a high-performance, precision-engineered component designed to enhance the efficiency and reliability of Chrysler, Dodge, Jeep, and Ram vehicles equipped with fuel-injected engines. This vapor tube, part of the vehicle s fuel system, plays a critical role in managing fuel vapors generated during normal engine operation, ensuring they are properly routed back to the intake manifold for combustion rather than being vented into the atmosphere. Crafted from durable, corrosion-resistant materials, the 68378400AC vapor tube is built to withstand the demanding conditions of high-performance driving, extreme temperatures, and prolonged exposure to fuel vapors, which can be highly corrosive over time. Its seamless design minimizes leaks and ensures a tight seal, preventing fuel odors, vapor loss, and potential emissions violations. This component is particularly essential for maintaining optimal engine performance, as it helps regulate fuel pressure and prevents vapor buildup that could lead to engine stalling, rough idling, or reduced fuel economy. Whether installed in a classic muscle car, a modern truck, or a high-mileage daily driver, the Mopar 68378400AC vapor tube delivers dependable performance, reinforcing the reputation of Mopar for providing genuine, high-quality replacement parts that meet or exceed OEM specifications. Its straightforward yet robust construction makes it an ideal choice for both professional mechanics and DIY enthusiasts seeking to restore or upgrade their vehicle s fuel system with confidence.

### Pros and Cons of buying a Mopar 68378400AC Vapor Tube

1. **Compatibility** This part is specifically designed for Mopar vehicles, ensuring a direct fit without the need for extensive modifications. It is commonly used in applications such as the 4.7L, 5.2L, and 5.7L V8 engines, particularly in models like the Jeep Grand Cherokee, Dodge Durango, and Chrysler 300.

2. **Reliability** Mopar is a trusted brand under Chrysler, known for producing high-quality aftermarket and OEM replacement parts. The vapor tube is designed to handle the engine s cooling system efficiently, reducing the risk of overheating and coolant loss.

3. **Ease of Installation** The part is straightforward to install, requiring basic tools and mechanical knowledge. Many users report that it can be swapped out in under an hour, especially if the vehicle is already cooled down and the engine bay is accessible.

4. **Cost-Effective** Compared to purchasing an entire cooling system or engine, replacing just the vapor tube is a relatively inexpensive fix. It can prevent more costly damage down the line, such as warped cylinder heads or a failing water pump.

5. **Prevents Coolant Leaks** The vapor tube helps manage coolant flow and pressure, reducing the likelihood of leaks from the radiator cap or hoses. This can extend the life of the cooling system components.

6. **Widely Available** As a common Mopar part, it is easy to find in auto parts stores, online retailers, or directly from Mopar s website. Availability ensures that replacements or additional support can be obtained quickly if needed.

7. **Durability** The material used in the vapor tube is designed to withstand the heat and pressure of an engine s cooling system, providing long-term performance under normal driving conditions.

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1. **Potential for Counterfeit Parts** Like many aftermarket or replacement parts, there is a risk of purchasing a counterfeit or low-quality vapor tube. Buying from reputable sellers (such as official Mopar dealers, RockAuto, or Amazon with verified sellers) can mitigate this risk, but it still requires caution.

2. **Age of the Part** If the vehicle is older, the vapor tube may wear out over time due to exposure to heat, coolant additives, or minor cracks that develop from thermal cycling. Regular inspection is recommended, especially in high-mileage vehicles.

3. **Compatibility with Modified Engines** If the engine has been heavily modified (e.g., forced induction, high-performance cooling upgrades), the stock vapor tube may not be sufficient. In such cases, an upgraded or aftermarket vapor tube may be necessary.

4. **Coolant System Maintenance** The vapor tube works best when the entire cooling system is in good condition. If the radiator, water pump, hoses, or thermostat are failing, replacing just the vapor tube may not fully resolve coolant-related issues. A comprehensive cooling system flush and inspection are advisable.

5. **Installation Challenges** While generally easy, some vehicles may have tight spaces in the engine bay, making installation slightly more difficult. Improper installation (e.g., overtightening or misalignment) could lead to leaks or damage to surrounding components.

6. **Limited Longevity in Extreme Conditions** Vehicles used in extreme environments (e.g., desert heat, heavy towing, or frequent high-performance driving) may experience accelerated wear on the vapor tube. In such cases, more frequent inspections or upgrades may be necessary.

7. **Mixed Reviews on Durability** Some users report that the vapor tube fails prematurely, particularly if the vehicle has a history of coolant system issues (e.g., hard water deposits, coolant contamination). This variability in durability can be frustrating for buyers.

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The Mopar 68378400AC vapor tube is a practical and cost-effective solution for addressing coolant system leaks or failures in compatible Mopar vehicles. Its compatibility, ease of installation, and reliability make it a strong choice for most drivers. However, potential buyers should be aware of the risks associated with counterfeit parts, the importance of maintaining the rest of the cooling system, and the possibility of premature failure in extreme conditions.

For most standard applications such as daily driving, light towing, or routine vehicle maintenance the vapor tube is a sound investment. If the vehicle is high-mileage, heavily modified, or used in harsh conditions, additional precautions (e.g., using high-quality coolant, inspecting the system regularly, or upgrading to a performance vapor tube) are recommended.

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1. **Purchase from a Trusted Source** Buy the vapor tube from an authorized Mopar dealer, a reputable online retailer (e.g., RockAuto, Amazon with verified sellers), or a well-reviewed local auto parts store to avoid counterfeit parts.

2. **Inspect the Cooling System** Before installing the new vapor tube, check the radiator, hoses, water pump, and thermostat for signs of wear or failure. A complete cooling system flush with a high-quality coolant (e.g., Mopar Premium or Prestone) will extend the life of the new part.

3. **Follow Installation Guidelines** Refer to the vehicle s service manual or Mopar s installation instructions to ensure the vapor tube is installed correctly. Avoid overtightening and ensure proper alignment to prevent leaks.

4. **Monitor for Leaks** After installation, monitor the engine bay for coolant leaks, especially during the first few drives. If leaks persist, recheck the installation or inspect for damage to surrounding components.

5. **Consider Upgrades for Performance Vehicles** If the vehicle is modified for high performance (e.g., turbocharging, forced induction), consider an aftermarket vapor tube designed for higher pressures and temperatures.

6. **Set a Reminder for Maintenance** Schedule regular cooling system inspections, especially if the vehicle is high-mileage or used in extreme conditions. Replace the vapor tube proactively if it shows signs of cracking or corrosion.

For the average driver with a stock or lightly modified Mopar vehicle, the Mopar 68378400AC vapor tube is a **reliable and cost-effective choice** for maintaining a healthy cooling system. With proper care and maintenance, it should provide years of trouble-free service.

Details:

The Genuine Mopar Vapor Tube 68378400AC is a high-quality replacement part specifically designed for vehicles.

part #: 68378400ac prices

• $48.13-$54.53

specifications emissyste:

• for makes: Mopar
• mpn: 68378400ac
• part type: Tube
• parts included: Only Part Reference 5 On The Diagram Is Included
• genuine oem: Yes
• replaces part number: 68378400ab
• universal fitment: Direct Replacement

payments emissyste:

• other
• credit card: Visa
• wallet: Google-pay

offer emissyste:

• sold: 0
• availability: In Stock
• quantity: 1
• started: March 15, 2026
• options: Ship-to-home

returns emissyste:

• paid by: Buyer
• policy: Returns Accepted
• time: 60 Days

shipping emissyste:

• service: USPS Ground Advantage
• carrier: USPS
• class: Standard
• type: Fixed
• transit: 4-8 Days
• cost: $5.00

general emissyste:

• Car Truck Parts Accessories > Exhaust Emission Systems > Other Exhaust Emission Parts
• condition: New other see details

seller emissyste:

• city: Madison height, Michigan
• rating: 98.4%
• # reviews: 264

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