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SKU:
NLT2T00277
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Valve Cover with Oil Cap 3928405 for Cummins 4B3.9 6B5.9 6C8.3 B3.9 B4.5 B5.9
$54.29
In Stock
$54.29
Sale price
$54.29
Regular price
This is a valve cover with oil fill cap for compatible Cummins B- and C-series diesel engines, including 4B3.9, 6B5.9, B4.5 and related applications.
Estimated delivery between
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
We do our best to list all compatible models, but equipment can vary by engine, serial number and production configuration. Use the part numbers and fitment details below to confirm your application.
| Equipment / Engine | Compatible Application |
|---|---|
| Cummins diesel engines | 4B3.9 / B3.9 |
| Cummins diesel engines | 6B5.9 / B5.9 |
| Cummins diesel engines | B4.5 |
| Cummins diesel engines | 6C8.3 applications where this cover configuration is used |
Product Overview
The valve cover seals the top of the cylinder head, keeps oil inside the valvetrain area and helps keep dirt and debris away from rocker components. Cracks, warped sealing surfaces or damaged cap openings can lead to oil seepage and contamination around the top of the engine.
Part number 3928405 is widely cross-referenced with Cummins B-series applications and related numbers such as 3960372. Engine build and breather arrangements can differ, so the casting shape, cap position and mounting pattern should be matched before installation.
Key Features & Performance
- Includes the valve-cover body and oil-fill cap configuration shown
- Helps contain engine oil around the rocker/valvetrain area
- Fits multiple Cummins industrial and equipment engine families
- Reference number 3928405 provides a strong identification point
Specifications
| Reference number | 3928405 |
| Additional cross-reference | 3960372; verify before ordering |
| Part type | Valve / rocker cover with oil-fill cap |
Before You Order
Compare the cover shape, bolt pattern, breather provisions and oil-fill location with the original cover. A new gasket may be required depending on what is included with your order.
Frequently Asked Questions
What usually causes a valve cover to need replacement?
Common reasons include cracks, distorted sealing surfaces, damaged oil-fill areas or persistent oil leakage that remains after the gasket and fasteners have been checked.
Is this an OEM part?
This listing is for a replacement component for the applications shown above. Match the reference number, physical configuration and machine or engine details before ordering.