
5312664 Comparison
| photo | price | summary | rating |
|---|---|---|---|
![]() | $224.99 | Condition is New other (see details), New Cummins aftercooler O-ring kit part # 5312664, shipping cost = $15.60 | 100.0% |
![]() | $225.00 | Top Pick! Condition is New other (see details), Cummins Kit, aftercooler O-Ring 5312664, shipping cost = $15.00 | 99.8% |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $472.04 | Condition is New, Cummins 5312664 Kit aftercooler O-Ring Fits 6CT 6CTA 6CTAA 8.3L , FREE SHIPPING | ![]() |

Cummins 5312664 Aftercooler O-Ring Kit
The Cummins 5312664 Aftercooler O-Ring Kit is an essential component for maintaining the optimal performance of your Cummins engine. This kit is specifically designed to fit various Cummins engines and replaces the worn-out or damaged O-rings in the aftercooler system.
The Aftercooler O-Ring Kit includes a comprehensive set of high-quality O-rings that cater to various applications in the aftercooler system. These O-rings are manufactured using advanced materials that ensure superior sealing properties, even under extreme temperatures and pressures. The kit comprises several sizes and shapes of O-rings, ensuring a perfect fit for your engine model.
The O-rings in this kit serve multiple purposes in the aftercooler system. They seal various joints and connections, preventing coolant and air from leaking out. Proper sealing is crucial for maintaining the coolant temperature and ensuring efficient engine operation. Additionally, the O-rings help to prevent contaminants from entering the coolant system, which could potentially cause damage to the engine.
Installing the Cummins 5312664 Aftercooler O-Ring Kit is a straightforward process. The kit comes with clear instructions, making it easy for DIY enthusiasts to complete the installation themselves. However, if you prefer, you can also have the kit installed by a professional mechanic. Replacing the O-rings in your aftercooler system at regular intervals is an essential part of engine maintenance, ensuring long-lasting and reliable performance.
In summary, the Cummins 5312664 Aftercooler O-Ring Kit is a crucial accessory for maintaining the performance and longevity of your Cummins engine. The high-quality O-rings in this kit ensure a perfect seal in the aftercooler system, preventing leaks and contaminants from entering. With clear installation instructions and a comprehensive set of O-rings, this kit is an excellent investment for any Cummins engine owner.
Cummins 5312664 Aftercooler O-Ring Kit: A Detailed Analysis
The Cummins 5312664 Aftercooler O-Ring Kit is a crucial component for maintaining the performance and efficiency of Cummins engines. This kit ensures the proper sealing of the aftercooler, which is essential for the cooling system to function optimally. In this analysis, we will discuss the pros and cons of buying this kit to help you make an informed decision.
Pros:1. Ensures Proper Sealing: The primary advantage of purchasing a Cummins 5312664 Aftercooler O-Ring Kit is that it guarantees a proper seal between the aftercooler and the engine components. A good seal is crucial as it prevents coolant leaks and ensures efficient cooling.
2. Improves Cooling System Performance: By maintaining a proper seal, this kit helps improve the overall performance of the cooling system. A well-sealed aftercooler ensures that coolant flows smoothly and evenly, which is essential for optimal engine temperature and longevity.
3. Reduces Maintenance Costs: Regularly replacing the o-rings in the aftercooler kit can help prevent costly repairs and engine damage caused by coolant leaks.
4. Easy Installation: The Cummins 5312664 Aftercooler O-Ring Kit is designed to be easy to install. The kit includes all the necessary o-rings, making it a convenient solution for engine owners looking to maintain their cooling system.
Cons:1. Cost: The Cummins 5312664 Aftercooler O-Ring Kit can be an expensive investment, especially for small engine owners or those operating on a tight budget.
2. Frequency of Replacement: Depending on the usage and operating conditions, the o-rings in the aftercooler kit may need to be replaced more frequently than other engine components. This can lead to additional costs over time.
Conclusion:The Cummins 5312664 Aftercooler O-Ring Kit is a valuable investment for anyone looking to maintain the performance and longevity of their Cummins engine. While it may come with a higher upfront cost, the benefits of a properly sealed aftercooler, improved cooling system performance, and reduced maintenance costs make it a worthwhile investment. For engine owners who prioritize the efficiency and reliability of their cooling system, the Cummins 5312664 Aftercooler O-Ring Kit is an excellent choice.
Details:
Kit comes with 5 o-rings. HM bin location p52 Cummins part # 5312664.
specifications inboardfuel:
- brand: Cummins
- mpn: 5312664
- part type: Ring
- country of origin: United States
payments inboardfuel:
- credit card: diners-club
- wallet: apple-pay
- other
general inboardfuel:
- category: Boat Parts > Inboard Engines Components > Intake Fuel Systems
returns inboardfuel:
- paid by: seller
- policy: returns accepted
- time: 30 days
seller inboardfuel:
- # reviews: 3363
- city: hyannis, massachusetts
- rating: 100.0%
shipping inboardfuel:
- carrier: usps
- service: usps priority mail
- type: calculated
- class: expedited
- transit: 4-9 days
offer inboardfuel:
- prices: $224.99–$472.04
- item condition:
- New other (see details)
- New
- availability: in stock
- started: january 22, 2026
- options: ship-to-home
- in stock #: 3
- best offers: true
- sold #: 10



