CUMMINS 3990099 Filler Cap

( Brand: Cummins ), ( Manufacturer Part Number: 3990099 ), ( Part Type: Filler Cap )

Review CUMMINS Filler Cap

Introducing the Cummins 3990099 Filler Cap, an essential component designed to ensure the proper sealing and functioning of your fuel system. This high-quality filler cap is engineered to fit select Cummins engines, specifically those requiring a part number starting with 3990099.

The Cummins 3990099 Filler Cap is manufactured with precision and durability in mind. It is made from robust materials that can withstand the rigors of heavy-duty applications. The cap's design features a secure sealing gasket that creates a tight seal, preventing fuel from leaking and ensuring optimal engine performance.

This filler cap comes with an integrated vent to allow air to enter the fuel tank while fuel is being dispensed, which helps maintain an equalized fuel pressure. It also has a vented fuel cap design that complies with the Environmental Protection Agency (EPA) regulations for evaporative emissions control.

The Cummins 3990099 Filler Cap is designed with a user-friendly twist-lock mechanism that makes it easy to access the fuel filler opening. This feature not only simplifies the refueling process but also helps prevent spills and fuel waste.

Moreover, the cap is equipped with a transparent fuel level indicator, allowing you to easily monitor the fuel level in your tank without having to open the cap every time. This not only saves time but also helps reduce the risk of fuel spills and potential contamination.

In summary, the Cummins 3990099 Filler Cap is a reliable and robust component that plays a crucial role in the fuel system of your Cummins engine. With its secure sealing design, user-friendly twist-lock mechanism, vented fuel cap, and transparent fuel level indicator, this filler cap offers convenience, functionality, and durability to keep your engine performing at its best.

Cummins Filler Cap (Part Number 3990099): A Comprehensive Analysis

The Cummins 3990099 filler cap is a crucial component for diesel engines, particularly those manufactured by Cummins. This analysis aims to provide an unbiased evaluation of this part, including its advantages, disadvantages, and a concluding recommendation.

1. OEM Part: This filler cap is an Original Equipment Manufacturer (OEM) part, ensuring a perfect fit and compatibility with Cummins engines.

2. Durability: Cummins is known for its robust engineering, and this filler cap is no exception. It is designed to withstand the harsh conditions of diesel engines.

3. Leak-Free: The seal on this filler cap is designed to prevent leaks, ensuring that fuel remains in the engine where it belongs and reducing the risk of messy spills.

1. Expensive: Compared to aftermarket alternatives, the Cummins OEM filler cap can be quite pricey.

2. Availability: Depending on the specific engine model and location, finding this part in stock may be challenging.

The Cummins 3990099 filler cap is a high-quality component that offers the advantage of being an OEM part, ensuring a perfect fit and durability. However, it comes with a higher price tag compared to aftermarket alternatives. If you value the peace of mind that comes with using genuine OEM parts, this filler cap is an excellent choice. Alternatively, if you're looking to save some money, you might consider an aftermarket alternative. Ultimately, the decision depends on your budget and priorities.

If you're looking for a reliable and durable filler cap for your Cummins engine and are willing to invest in an OEM part, the Cummins 3990099 filler cap is an excellent choice. On the other hand, if you're looking to save some money, you might consider exploring aftermarket alternatives. Regardless of your decision, ensure that you're purchasing the correct part number for your specific engine model to ensure proper fitment and functionality.

Details:

With this Cummins Filler Cap, you can be assured of its quality and performance. It is a great addition to your trucks engine and easy install. It is designed to fit perfectly and enhance the functionality of your trucks engine.

part #: 3990099 prices

• $7.88-$50.00

specifications commerciatruc:

• brand: Cummins
• mpn: 3990099
• part type: Filler Cap

general commerciatruc:

• condition: New
• Parts Accessories > Commercial Truck Parts > Other Commercial Truck Parts

offer commerciatruc:

• availability: In Stock
• started: May 5, 2025
• options: Ship-to-home
• sold: 0
• quantity: 1

seller commerciatruc:

• rating: 100.0%
• city: Waco, Texas
• # reviews: 17

returns commerciatruc:

• policy: No Returns

shipping commerciatruc:

• transit: 3-9 Days
• cost: $0.00
• class: Standard
• carrier: USPS
• type: Calculated
• service: USPS Ground Advantage

payments commerciatruc:

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

Cummins 3990099 Is Similar To:

• 33009045 Lot Of 23 Heax Cap Screws Bolts Cummins 5 1 2 Long Fine Thread 5 8 (27.7% similar) ...(April 27th, 2016)
• Cummins Oem Oil Filler Connection (57.6% similar) Oil connection for a Cummins...(October 29th, 2018)
• Cummins 2880396 Filler Cap Is Used Primarily On Epa13 6.7 Liter Isf qsf Engines (40% similar) It comes with an unspecified length warranty for added peace of mind. The Cummins filler cap 2880396 is designed for use on EPA13 6.7 liter ifs/SF engines. Made by Cummins in the USA, this filler cap provides a reliable seal for engine...(February 14th, 2025)
• Cummins 3088162 Bag Of 3 Hexagon Head Cap Screw (43.8% similar) Part #: Cummins 3088162 for sale...(September 4th, 2025)
• Cummins 3902114 3-2 Pack Genuine Hexagon Flange Head Cap Screw Oem New (38.4% similar) The product is a 3-2 pack of genuine Cummins hexagon flange head cap screws, with the manufacturer part number 3902114. These oem screws are brand new and designed specifically for commercial trucks...(October 26th, 2025)
• Cummins 4962610 New Replaces Seal Oil Cap (50.7% similar) Condition: new. Brand: Cummins...(November 14th, 2025)
• Cummins 4082974 Genuine Plug Cover Oem Seal Cap New (49.4% similar) Part details: oem number: 4082974. Quantity: 1 piece.: plug cover / seal cap. Packaging: original bag aged/worn. The original Cummins packaging has aged, wrinkled, and partially separated due to long-term storage dated 2005 , but the plug cover itself is in perfect new condition. Compatibility: ...(December 6th, 2025)
• Cummins 3902116 One Hex Flange Head Cap Screw Genuine Oem Made In Usa (40% similar) Part #: Cummins 3902116 for sale...(January 1st, 2026)
• Cummins 3954701 New Oem Screw Hex Flang Hd Cap G57 (47.4% similar) The product is a brand new oem Cummins screw with hex flange HD cap, specifically designed as G57...(January 24th, 2026)
• Cummins 3093807 Qty 4 Multi Purpose Hardware Screw Hexagon Flange Head Cap (38% similar) Qty 4 Cummins 3093807: multi purpose hardware screw, hexagon flange head cap qty...(February 25th, 2026)
• Cummins 4026889 Nos Genuine Oem Engine 4026889 Oil Level Dipstick Lock Cap (35% similar) This sale is for a new old stock Cummins engine cap and dipstick with the part number 4026889...(May 2nd, 2026)