Product Description
The CUMMINS 3905802 OEM OIL GAUGE TUBE END is the genuine end-piece for the oil gauge (dipstick) tube assembly on many 1994–1998 Ram 2500/3500 5.9L 12-valve Cummins trucks. This small but critical component helps guide and seal the dipstick at the top of the tube, keeping your oil level readings accurate and preventing moisture and debris from entering the tube. Built to Cummins engineering standards, this tube end is also used across multiple B-series and midrange Cummins engines, making it a smart choice for both pickup and industrial applications that demand reliability.
When paired with the correct OEM dipstick tube and dipstick, the 3905802 tube end helps maintain factory oil level calibration so you’re not guessing at “FULL” when towing, daily driving, or running tuned power levels.
Fitment
- 1994–1998 Dodge Ram 2500/3500 with 5.9L 12-Valve Cummins (6BT) – typical automotive application (verify by VIN/ESN)
- Also appears on various Cummins B-series / midrange engines:
- 4B3.9 / B3.9, 6B5.9 / B5.9 / ISB (including some Chrysler/Euro V applications)
- 6C8.3 / C8.3, ISC/ISL midrange platforms
- Selected QSB and industrial B-series engines (confirm by engine serial number)
Always verify fitment by engine serial number (ESN) or OEM literature for non-automotive and industrial applications.
How This Part Is Used
- Installs at the upper end of the OEM oil gauge tube assembly
- Provides a properly sized passage and seat for the dipstick blade
- Helps keep the dipstick correctly aligned and sealed for repeatable oil readings
- Designed to handle engine bay heat, vibration, and fluid exposure over long service life
Recommended Cummins Companion Parts (Cummins-Only)
For a complete, leak-free oil level system on 5.9L 12-valve trucks, pair the 3905802 tube end with these genuine Cummins components from CPP Diesel:
- CUMMINS 3905801 OEM OIL GAUGE TUBE (DIPSTICK TUBE) – RAM 5.9L 12V (1994–1998)
- CUMMINS 3905799 OEM OIL GAUGE TUBE (DIPSTICK TUBE) – RAM 5.9L (1989–1998)
- CUMMINS 5269589 OEM OIL GAUGE TUBE (DIPSTICK TUBE) – 5.9L 6BT (1989–1998)
- CUMMINS 3923016 OEM CLIP – OIL LEVEL (DIPSTICK) TUBE – RAM 5.9L 12-VALVE (1994–1998)
- CUMMINS 3909395 OEM SPRING HOSE CLAMP (DIPSTICK) – RAM 5.9L (1994–1998)
- CUMMINS 3928740 OEM ENGINE OIL DIPSTICK – 5.9L 12-VALVE (1994–1995)
- CUMMINS 3923128 OEM ENGINE OIL DIPSTICK – 5.9L 12-VALVE (1996–1998)
Why Choose Genuine Cummins 3905802 From CPP Diesel?
- OEM accuracy: Correct end-form and dimensions for B-series tubes and dipsticks.
- Consistent readings: Helps keep your oil level marks where Cummins intended.
- Durability: Built to withstand vibration, temperature swings, and oil exposure.
- Wide application: Suitable for Ram pickups and many midrange/industrial Cummins engines.
Install Tips
- Inspect the existing tube and dipstick for rust, damage, or distortion before reusing.
- Clean the inside of the tube and the new tube end to remove sludge or debris.
- Make sure the tube end is fully seated and correctly oriented to the tube and bracket.
- After installation, warm the engine, park on level ground, and verify the oil level using the correct OEM dipstick for your year.
FAQ
Will Cummins 3905802 fit my 1994–1998 5.9L 12-valve Ram?
Yes. The 3905802 tube end is commonly used on 1994–1998 Dodge Ram 2500/3500 5.9L 12-valve applications when paired with the correct OEM dipstick tube and dipstick. Always verify by VIN/ESN if your truck has been modified or repaired with non-stock components.
Is 3905802 the piece the dipstick tube slides into?
It’s the oil gauge tube end at the upper portion of the dipstick tube assembly. It helps align and support the dipstick for accurate readings and provides a clean, sealed interface at the top of the tube.
Which Cummins parts should I pair with this tube end?
For 5.9L 12-valve trucks, the 3905802 tube end is often paired with the 3905801 or 3905799/5269589 dipstick tubes, the 3923016 tube clip, and the correct OEM dipstick (3928740 for many ’94–’95 trucks, 3923128 for many ’96–’98 trucks). Matching all components keeps the tube properly supported and oil level marks accurate.
Does this part also work on industrial or midrange Cummins engines?
Yes. The 3905802 oil gauge tube end is listed across many B-series and midrange Cummins platforms (4B3.9, 6B5.9, 6C8.3, ISC/ISL, and more). For industrial, generator, and equipment engines, always confirm by engine serial number (ESN) and Cummins parts documentation.
Is this a genuine Cummins part or aftermarket?
This listing is for a genuine Cummins 3905802 oil gauge tube end supplied through CPP Diesel – not a generic or “will-fit” substitute. You get OEM material quality, geometry, and compatibility with Cummins oil gauge tube assemblies.
Specifications for cummins 3905802
| Specification | Value |
|---|---|
| Brand | Cummins Genuine Parts |
| Part Number | 3905802 |
| UPC | Not specified by manufacturer / not publicly listed |
| GTIN | Not specified by manufacturer / not publicly listed |
| Engine Platform | Cummins B-series & midrange: 4B3.9 / B3.9, 6B5.9 / B5.9 / ISB, 6C8.3 / C8.3, select ISC/ISL and QSB applications (verify by ESN) |
| Typical Vehicle Fitment | 1994–1998 Dodge Ram 2500/3500 with 5.9L 12-Valve Cummins (6BT), plus various midrange/industrial B-series engines |
| Cross Reference | Used with tubes 3905801, 3905799, 5269589 and dipsticks 3928740 / 3923128 (compatibility varies by build – verify by ESN) |
| E-Codes / Emissions | Not applicable (mechanical oil level component) |
| Shipping Weight | Approx. 0.03 lb (0.02 kg) – small hardware item |
| Package Dimensions | Approx. 2 in x 1 in x 1 in (may vary by packaging) |
| Shipping Method | Standard ground shipping from CPP Diesel (expedited options available at checkout) |
| Prop 65 Warning | This product can expose you to chemicals present in engine oils and fuel residues, which are known to the State of California to cause cancer and reproductive harm. For more information, visit www.P65Warnings.ca.gov. |
